<PAGE>   1
 
================================================================================
 
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                            ------------------------
 
                                   FORM 10-Q
 
(MARK ONE)
 
[X] QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE
    ACT OF 1934
 
                  FOR THE QUARTERLY PERIOD ENDED JUNE 30, 1997
 
                                       OR
 
[ ] TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE
    ACT OF 1934
 
                         FOR THE TRANSITION PERIOD FROM
                               --------------- TO
                                ---------------
 
                         COMMISSION FILE NUMBER: 28050
                            ------------------------
 
                          ONYX ACCEPTANCE CORPORATION
                            ------------------------
 
<TABLE>
<S>                                           <C>
                   DELAWARE                                     33-0577635
        STATE OR OTHER JURISDICTION OF                       (I.R.S. EMPLOYER
        INCORPORATION OR ORGANIZATION                      IDENTIFICATION NO.)
</TABLE>
 
                          ONYX ACCEPTANCE CORPORATION
                      8001 IRVINE CENTER DRIVE, 5TH FLOOR
                               IRVINE, CA. 92618
                                 (714) 450-5500
                            ------------------------
 
     Indicate by check mark whether the registrant (1) has filed all reports
required to be filed by Section 13 or 15(d) of the Securities Exchange Act of
1934 during the preceding 12 months (or for such shorter period that the
registrant was required to file such reports), and (2) has been subject to such
filing requirements for the past 90 days. Yes [X] No [ ]
 
     As of July 31, 1997, there were 6,014,695 shares of registrant's Common
Stock, par value $.01 per share outstanding.
 
================================================================================
<PAGE>   2
 
                          ONYX ACCEPTANCE CORPORATION
 
                     INDEX TO QUARTERLY REPORT ON FORM 10-Q
 
<TABLE>
<CAPTION>
                                                                                        PAGE
                                                                                        ----
<S>                                                                                     <C>
PART I. FINANCIAL INFORMATION
Item 1. Financial Statements
         Consolidated Statements of Financial Condition at June 30, 1997 (Unaudited)
           and December 31, 1996......................................................    3
         Consolidated Income Statements for the three months and six months
           ended June 30, 1997 (Unaudited) and June 30, 1996 (Unaudited)..............    4
         Consolidated Statements of Cash Flows for the three months and six months
           ended June 30, 1997 (Unaudited), and June 30, 1996 (Unaudited).............    5
         Notes to Consolidated Financial Statements...................................    6
 
Item 2. Management's Discussion and Analysis of Financial Condition and Results of
Operations............................................................................    8
 
PART II. OTHER INFORMATION
Item 4. Submission of Matters to a Vote of Security Holders...........................   12
Item 5. Other Information.............................................................   12
Item 6. Exhibits and Reports on Form 8-K..............................................   16
 
SIGNATURES............................................................................   22
</TABLE>
 
                                        2
<PAGE>   3
 
PART I.  FINANCIAL INFORMATION
 
ITEM 1.  FINANCIAL STATEMENTS.
 
                  ONYX ACCEPTANCE CORPORATION AND SUBSIDIARIES
 
                 CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION
 
                                     ASSETS
 
<TABLE>
<CAPTION>
                                                                                                
                                                                                                
                                                                     JUNE 30,       DECEMBER 31,
                                                                       1997             1996    
                                                                   ------------     ------------
                                                                   (UNAUDITED)
<S>                                                                <C>              <C>
Cash and cash equivalents........................................  $  1,421,338      $   603,028
Trust receivables................................................    19,203,742       10,105,690
Contracts held for sale -- net of allowance(1)...................    59,733,080       12,562,072
Retained interest in securitized assets..........................    35,833,427       29,632,039
Other assets.....................................................     6,126,642        3,774,123
                                                                   ------------      -----------
          Total assets...........................................  $122,318,229      $56,676,952
                                                                   ============      ===========
 
                                     LIABILITIES AND EQUITY
Liabilities
Debt.............................................................  $ 71,940,265      $13,194,560
Other liabilities................................................    11,142,382        5,568,577
                                                                   ------------      -----------
          Total liabilities......................................    83,082,647       18,763,137
          Total equity...........................................    39,235,582       37,913,815
                                                                   ------------      -----------
          Total liabilities and equity...........................  $122,318,229      $56,676,952
                                                                   ============      ===========
</TABLE>
 
---------------
 
(1) Net of Unearned Discounts
 
        See accompanying notes to the consolidated financial statements
 
                                        3
<PAGE>   4
 
                  ONYX ACCEPTANCE CORPORATION AND SUBSIDIARIES
 
                         CONSOLIDATED INCOME STATEMENTS
                                  (UNAUDITED)
 
<TABLE>
<CAPTION>
                                                    THREE MONTHS ENDED         SIX MONTHS ENDED
                                                         JUNE 30,                  JUNE 30,
                                                  -----------------------   -----------------------
                                                     1997         1996         1997         1996
                                                  ----------   ----------   ----------   ----------
<S>                                               <C>          <C>          <C>          <C>
REVENUES:
Finance revenue.................................  $3,265,712   $2,752,428   $5,147,704   $4,887,780
Interest expense................................   1,830,284    1,255,688    2,885,192    3,045,956
                                                  ----------   ----------   ----------   ----------
Net finance revenue.............................   1,435,428    1,496,740    2,262,512    1,841,824
Provision for credit losses.....................     211,324       49,824      504,594      (25,070)
                                                  ----------   ----------   ----------   ----------
Net finance revenue after provision.............   1,224,104    1,446,916    1,757,918    1,866,894
Gain on sale of loans...........................   4,300,069    4,175,387    8,076,212    9,500,098
Service fee income..............................   2,975,717      680,701    5,595,354    1,785,595
 
EXPENSES:
Salaries and benefits...........................   4,327,419    2,065,663    7,744,744    3,871,645
Depreciation....................................     258,819      199,041      460,801      369,439
Occupancy.......................................     333,183      154,624      657,274      276,747
General and administrative expenses.............   2,461,962    1,241,377    4,399,714    2,010,601
                                                  ----------   ----------   ----------   ----------
Total expenses..................................   7,381,383    3,660,705   13,262,533    6,528,432
                                                  ----------   ----------   ----------   ----------
Net income before income taxes..................   1,118,507    2,642,299    2,166,951    6,624,155
Income taxes....................................     465,297      526,591      901,297    1,308,691
                                                  ----------   ----------   ----------   ----------
Net income......................................  $  653,210   $2,115,708   $1,265,654   $5,315,464
                                                  ==========   ==========   ==========   ==========
Net income per share............................  $     0.10   $     0.33   $     0.20   $     1.06
Weighted average number of shares of Common
  Stock and Common Stock Equivalents
  outstanding...................................   6,377,710    6,375,451    6,354,662    5,036,488
</TABLE>
 
        See accompanying notes to the consolidated financial statements
 
                                        4
<PAGE>   5
 
                  ONYX ACCEPTANCE CORPORATION AND SUBSIDIARIES
 
                CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
 
<TABLE>
<CAPTION>
                                                                                SIX MONTHS ENDED
                                                                                    JUNE 30,
                                                                         -------------------------------
                                                                             1997              1996
                                                                         -------------     -------------
                                                                                   (UNAUDITED)
<S>                                                                      <C>               <C>
Net cash (used) provided by operating activities.....................    $ (56,556,748)    $  36,328,936
 
INVESTING ACTIVITIES:
  Purchases of property and equipment................................       (1,735,534)         (725,808)
                                                                         -------------     -------------
     Net cash used in investing activities...........................       (1,735,534)         (725,808)
 
FINANCING ACTIVITIES:
  Proceeds from issuance of common stock.............................                         30,337,128
  Proceeds from exercise of options/warrants.........................           56,112             5,070
  Payments of IPO related and other capitalized fees.................                         (1,735,669)
  Proceeds from drawdowns on warehouse line of credit................                          1,048,568
  Payments on capital lease obligations..............................          308,775            24,651
  Proceeds from drawdowns on excess servicing line of credit.........       13,500,000        12,800,000
  Payoff of excess servicing line of credit..........................                        (12,800,000)
  Payoff of dealer participation line of credit......................                        (10,617,786)
  Paydown of commercial paper related to securitization..............     (198,500,000)     (176,000,000)
  Proceeds from issuance of commercial paper.........................      243,913,253       130,699,469
  Payoff of subordinated debt........................................                        (10,000,000)
  Proceeds (payments) on other debt..................................         (167,548)          753,967
                                                                         -------------     -------------
     Net cash provided by (used in) financing activities.............       59,110,592       (35,484,602)
                                                                         -------------     -------------
     Increase in cash and cash equivalents...........................          818,310           118,526
Cash and cash equivalents at beginning of period.....................          603,028         1,622,713
                                                                         -------------     -------------
     Cash and cash equivalents at end of period......................    $   1,421,338     $   1,741,239
                                                                         =============     =============
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:
     Cash paid for interest                                              $   2,751,361     $   3,936,722
</TABLE>
 
        See accompanying notes to the consolidated financial statements
 
                                        5
<PAGE>   6
 
                  ONYX ACCEPTANCE CORPORATION AND SUBSIDIARIES
 
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                                  (UNAUDITED)
 
NOTE 1 -- SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
 
     Basis of Presentation. The financial statements included herein are
unaudited and have been prepared in accordance with generally accepted
accounting principles for interim financial reporting and Securities and
Exchange Commission regulations. Certain information and footnote disclosures
normally included in financial statements prepared in accordance with generally
accepted accounting principles have been condensed or omitted pursuant to
regulations. In the opinion of management, the financial statements reflect all
adjustments (of a normal and recurring nature) which are necessary to present
fairly the financial position, results of operations and cash flows for the
interim periods. Operating results for the six months ended June 30, 1997 are
not necessarily indicative of the results that may be expected for the year
ending December 31, 1997. For further information, refer to the financial
statements and footnotes thereto included in the Company's 1996 Annual Report On
Form 10-K and Annual Report on Form 10-K/A and 10-Q for the quarter ended March
31, 1997.
 
NOTE 2
 
     Earnings Per Share. In February 1997, the Financial Accounting Standards
Board issued Statement No. 128, "Earnings per Share," ("SFAS 128") which is
required to be adopted on December 31, 1997. At that time, the Company will be
required to change the method currently used to compute earnings per share and
to restate all prior periods. Under the new requirements for calculating basic
earnings per share, the dilutive effect of common stock equivalents will be
excluded. The Company has not yet determined what the impact of SFAS 128 will be
on the calculation of earnings per share but management does not believe the
impact is material.
 
NOTE 3 -- CONTRACTS HELD FOR SALE
 
     Contracts held for sale consisted of the following:
 
<TABLE>
<CAPTION>
                                                             JUNE 30,       DECEMBER 31,
                                                               1997             1996
                                                            -----------     ------------
        <S>                                                 <C>             <C>
        Contracts held for sale...........................  $69,033,249      $14,539,285
        Less Unearned interest............................   10,488,529        2,301,207
                                                            -----------      -----------
                                                             58,544,720       12,238,078
        Allowance for credit losses.......................     (292,724)         (61,190)
                                                            -----------      -----------
                                                             58,251,996       12,176,888
        Dealer participation..............................    1,481,084          385,185
                                                            -----------      -----------
        Total.............................................  $59,733,080      $12,562,073
                                                            ===========      ===========
</TABLE>
 
NOTE 4 -- RETAINED INTEREST IN SECURITIZED ASSETS
 
     SFAS 125 requires that following a transfer of financial assets, an entity
is to recognize the assets it controls and the liabilities it has incurred, and
derecognize assets for which control has been surrendered and liabilities that
have been extinguished.
 
     Retained interests in securitized assets ("RISA") capitalized upon
securitization of contracts represent the present value of the estimated future
earnings to be received by Onyx from the excess spread created in securitization
transactions. Excess spread is calculated by taking the difference between the
coupon rate of the contracts sold and the certificate rate paid to the investors
less contractually specified servicing and guarantor fees and projected credit
losses, after giving effect to estimated prepayments.
 
                                        6
<PAGE>   7
 
                  ONYX ACCEPTANCE CORPORATION AND SUBSIDIARIES
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
                                  (UNAUDITED)
 
     Prepayment and credit loss assumptions are based on industry and the
Company's historical experience. Credit losses are projected using cumulative
loss frequency and severity estimates by management. All assumptions are
evaluated each quarter and adjusted, if appropriate, to reflect the actual
performance of the contracts.
 
     Future earnings are discounted at a rate management believes to be
representative of market at the time of securitization. The balance of RISA is
amortized against actual excess spread income earned on a monthly basis over the
expected repayment life of the underlying contracts. RISAs are marked to market
each quarter. Market value changes are calculated by discounting the excess
spread using a current market discount rate. As of June 30, 1997 the market
value of RISAs approximated cost. Onyx retains the rights to service all
contracts it securitizes.
 
     The following table presents the activity of the RISA.
 
<TABLE>
<CAPTION>
                                                                       SIX MONTHS ENDED
                                                                        JUNE 30, 1997
                                                                       ----------------
        <S>                                                            <C>
        Balance December 31, 1996..................................      $ 29,632,039
        Additions..................................................        17,250,000
        Amortizations..............................................       (11,048,612)
                                                                         ------------
        Ending balance.............................................      $ 35,833,427
                                                                         ============
</TABLE>
 
     In initially valuing the RISA, Onyx established an off balance sheet
allowance for expected future credit losses. The allowance is based upon
historical experience and management's estimate of future performance regarding
credit losses. The amount is reviewed periodically and adjustments are made if
actual experience or other factors indicate that future performance may differ
from management's prior expectations.
 
     The following table presents the estimated future undiscounted retained
interest earnings to be received from securitizations. Estimated future
undiscounted RISA earnings are calculated by taking the difference between the
coupon rate of the contracts sold and the certificate rate paid to the
investors, less the contractually specified servicing fee of 1.0% and guarantor
fees, after giving effect to estimated prepayments and assuming no losses. To
arrive at the RISA, this amount is reduced by the off balance sheet allowance
established for potential future losses and by discounting to present value.
 
<TABLE>
<CAPTION>
                                                        JUNE 30, 1997     DECEMBER 31, 1997
                                                        -------------     -----------------
        <S>                                             <C>               <C>
        Estimated net undiscounted RISA earnings....     $ 56,119,981        $ 41,493,370
        Off balance sheet allowance for losses......       16,552,472           8,415,871
        Discount to present value...................        3,734,082           3,445,460
                                                         ------------        ------------
        Retained interest in securitized assets.....     $ 35,833,427        $ 29,632,039
                                                         ============        ============
        Outstanding balance of contracts sold
          through securitizations...................     $506,377,151        $388,427,211
                                                         ============        ============
</TABLE>
 
     Management believes that the off balance sheet allowance for losses is
currently adequate to absorb potential losses in the sold portfolio.
 
                                        7
<PAGE>   8
 
ITEM 2.MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS
       OF OPERATIONS.
 
OVERVIEW
 
     Onyx Acceptance Corporation (the "Company" or "Registrant") is a
specialized consumer finance company engaged in the purchase, securitization and
servicing of motor vehicle retail installment contracts ("Contracts") originated
by franchised and select independent automobile dealerships within California,
Arizona, Washington, Oregon, Idaho, Illinois, Indiana, Nevada and Florida. The
Company focuses its efforts on acquiring Contracts that are secured by late
model used and, to a lesser extent, new automobiles and entered into with
purchasers whom the Company believes have a favorable credit profile. As of June
30, 1997, the Company had acquired over $860 million in Contracts from over
2,000 dealerships in California, Arizona, Washington, Oregon, Idaho, Illinois,
Indiana, Nevada and Florida.
 
     The following table illustrates the changes in the Company's Contract
acquisition volume, total revenue, securitization activity and servicing
portfolio during the past five fiscal quarters:
 
                    SELECTED QUARTERLY FINANCIAL INFORMATION
 
<TABLE>
<CAPTION>
                                                      FOR THE QUARTERS ENDED
                       ------------------------------------------------------------------------------------
                       MARCH 31,     JUNE 30,     SEPTEMBER 30,     DECEMBER 31,     MARCH 31,     JUNE 30,
                         1996          1996           1996              1996           1997          1997
                       ---------     --------     -------------     ------------     ---------     --------
                                                      (DOLLARS IN THOUSANDS)
<S>                    <C>           <C>          <C>               <C>              <C>           <C>
Contracts purchased
  during period......  $  73,343     $ 83,555       $  79,936         $ 83,006       $ 125,713     $145,548
Average monthly
  purchases during
  period.............     24,433       27,852          26,645           27,669          41,904       48,516
Gain on Sale of
  Contracts..........      5,325        4,175           4,325            4,303           3,776        4,300
Total revenue(1).....      6,775        6,353           6,303            5,790           7,223        8,711
Contracts Securitized
  during period......    100,500       85,013         120,000          100,000          90,000      121,676
Servicing Portfolio
  at period end......    266,251      317,054         359,104          400,665         478,440      564,922
</TABLE>
 
---------------
 
(1) Total revenue is comprised of Net Interest Income, Servicing Fee Income and
    Gain on Sale of Contracts.
 
     Net income decreased from $2.1 million or $.33 per share in the second
quarter of 1996 to $653,210 or $.10 per share in the second quarter of 1997. Net
income for the six month period ended June 30, 1997 decreased to $1.3 million or
$.20 per share from $5.3 million or $1.06 per share for the like period of 1996.
Due to the utilization of NOL carryforwards, second quarter 1996 income was not
fully tax effected (effective tax rate of 19.9%). These carryforwards were not
available to the Company in the second quarter of 1997, when the effective tax
rate was 41.6%. Assuming a statutory effective tax rate of 41.6%, net income and
net income per share for the second quarter 1996 would have been $1.5 million
and $0.24 per share, respectively. Also, Management believes it was prudent in
light of the performance of the securitized receivables in several of the
grantor trusts completed in 1996 to include a pretax charge of $900,000 or $.08
per share during the second quarter of 1997, to increase the off-balance sheet
loss reserves.
 
CONTRACTS PURCHASED AND SERVICING PORTFOLIO.
 
     The Company continued to experience significant growth in its purchased
volume of Contracts. This growth was due to the continued expansion of its
markets including the opening of two new offices during the second quarter, in
Florida and Illinois, and the initiation of contract purchases from dealerships
in Oregon, Idaho and Indiana. Also, the Company has increased penetration within
existing markets in California, Arizona, Washington and Nevada. Purchased
Contract volume increased to $145.5 million for the second quarter of 1997 from
$83.6 million for the second quarter of 1996, representing an increase of 74%.
For the six
 
                                        8
<PAGE>   9
 
month period ended June 30, 1997 purchased Contracts volume was $271.3 million
compared to $156.9 million for the six month period ending June 30, 1996. The
Company's servicing portfolio at June 30, 1997 was $564.9 million compared to
$317.1 at June 30, 1996, an increase of 78.1%. Average Contracts serviced for
the six months ended June 30, 1997 were $475.1 million as compared to $265.2
million for the like period of 1996. Total revenues for the second quarter of
1997 were $8.7 million compared to $6.4 million for the same period of 1996.
Total revenues for the six months ended June 30, 1997 were $15.9 million as
compared to $13.1 million for the six month period ended June 30, 1996.
 
                             RESULTS OF OPERATIONS
 
QUARTERS ENDED JUNE 30, 1997 AND 1996 AND SIX MONTHS ENDED JUNE 30, 1997 AND
1996
 
     NET FINANCE REVENUE. Net finance revenue decreased to $1.4 million for the
quarter ended June 30, 1997 from $1.5 million for the same period in 1996. Net
finance revenue for the six month period ending June 30, 1997 increased by 27.8%
to 2.3 million from $1.8 million for the like period of 1996. The period to
period variances are primarily attributable to fluctuations in Contracts held
for sale during each period.
 
     PROVISIONS FOR CREDIT LOSSES. During the quarter ended June 30, 1997, the
provision for credit losses totaled $211,324 compared to $49,824 for the same
period ended in 1996. This increase is attributable to an increase in Contracts
held for sale in the period and to a general increase in reserves on those
contracts held for sale at the end of the period in response to generally higher
loss experience. Provision for credit losses for the six month period ended June
30, 1997 were $504,594 compared to $(25,070) for the period ended June 30, 1996.
At June 30, 1997 Contracts held for sale were $59.7 million compared to $12.6
million at December 31, 1996.
 
     GAIN ON SALE OF CONTRACTS. The Company completed a $121.7 million
securitization during the quarter ended June 30, 1997, resulting in a gain on
sale of Contracts of $4.3 million compared to a securitization of $85.0 million
for the second quarter of 1996, resulting in a gain on sale of $4.2 million. The
gain on sale for the securitization completed in the second quarter of 1997 was
only moderately higher than that for the like period in 1996, notwithstanding
that the transaction was $36.7 million larger, due primarily to the increase in
the Company's assumption for loan losses in its gain on sale calculation. The
gain was reduced by a pretax charge of $900,000 to increase off balance sheet
loss reserves. Gain on sale of Contracts for the six months period ending June
30, 1997 was $8.1 million with sales of $211.7 million compared to $9.5 million
with sales of $185.5 million for the six month period ending June 30, 1996.
 
     SERVICING FEE INCOME. Servicing fee income increased to $3.0 million for
the quarter ended June 30, 1997 from $680,701 for the quarter ended June 30,
1996. The increase was attributable to a significant increase in the size of the
servicing portfolio from $317.1 million at June 30, 1996 to $564.9 million at
June 30, 1997. Servicing fee income for the six months ending June 30, 1997 was
$5.6 million compared to $1.8 million for the six months ending June 30, 1996.
 
     SALARIES AND BENEFITS EXPENSE. The Company incurred salary and benefit
expenses of $4.3 million during the second quarter of 1997 compared with $2.1
million for the second quarter of 1996, an increase of 105%. This is
attributable to staffing of the two additional Auto Finance Centers, growth of
the servicing portfolio and the fact that the number of employees at the Company
increased from 131 at June 30, 1996 to 292 at June 30, 1997. Salary and benefit
expenses for the six month period ended June 30, 1997 were $7.7 million compared
to $3.9 million for the six months ending June 30, 1996.
 
     OTHER OPERATING EXPENSES. Other operating expenses increased by 93.8% to
$3.1 million for the quarter ended June 30, 1997 from $1.6 million for the same
period ended June 30, 1996. The increases are due to growth of the servicing
portfolio, growth in activity related to Contracts purchased and the opening of
two new auto finance centers. Other operating expenses for the six month period
ending June 30, 1997 were $5.5 million compared to $2.7 million for the same
period in 1996.
 
     NET INCOME. The Company posted net income of $653,210 for the quarter ended
June 30, 1997 or $.10 per share compared to $2.1 million or $.33 per share for
the same period of 1996. Due to the utilization of NOL carryforwards, second
quarter 1996 income was not fully tax effected (effective tax rate of 19.9%).
 
                                        9
<PAGE>   10
 
These carryforwards were not available to the Company in the second quarter of
1997, when the effective tax rate was 41.6%. Assuming a statutory effective tax
rate of 41.6%, net income and net income per share for the second quarter 1996
would have been $1.5 million and $0.24 per share, respectively. For the six
months ended June 30, 1997, net income was $1.3 million compared to $5.3 million
for the period ending June 30, 1996.
 
ASSET QUALITY
 
     At June 30, 1997, delinquencies for the Servicing Portfolio equalled 2.05%
or $11.6 million as compared to 1.05% at June 30, 1996 or $3.3 million.
 
     Loan losses for the Servicing Portfolio as a percentage of average serviced
loans outstanding increased to 2.04% during the second quarter of 1997 compared
to 1.29% for the second quarter of 1996. The levels of delinquencies and loan
losses have increased on a year over year basis due in part to the continued
seasoning of the Company's auto portfolio. The portfolio, however, has sustained
higher than expected levels of delinquencies and loan losses due to the
continued recognition of loan losses on contracts purchased from dealerships,
primarily out of the Company's North Hollywood office. The Company announced
that the primary segment contributing to the higher than projected losses are
those contracts originated from dealerships serviced by the North Hollywood
office from July 1995 to July 1996. The Company expects the loans from this
segment of the portfolio to contribute a disproportionate share of the overall
loan losses of the Company through the end of 1997 and to contribute to
increased loan losses through the fourth quarter of 1997. As a result of these
developments, the Company increased its off-balance sheet reserves during the
second quarter of 1997. At June 30, 1997, off-balance sheet reserves as a
percentage of contracts sold in securitizations were 3.27%.
 
                 DELINQUENCY EXPERIENCE OF SERVICING PORTFOLIO
 
<TABLE>
<CAPTION>
                                                            FOR THE QUARTERS ENDED JUNE 30,
                                                      -------------------------------------------
                                                             1997                    1996
                                                      -------------------     -------------------
                                                       AMOUNT       NO.        AMOUNT       NO.
                                                      --------     ------     --------     ------
                                                                (DOLLARS IN THOUSANDS)
<S>                                                   <C>          <C>        <C>          <C>
Servicing portfolio.................................  $564,922     54,243     $317,054     29,494
Delinquencies(1)(2)
  31-59 days........................................  $  7,023        699        1,855        153
  60-89 days........................................  $  1,981        178          796         65
  90+ days..........................................  $  2,591        229          691         58
Total...............................................  $ 11,595      1,106        3,342        276
Total delinquencies as a percent of Servicing
  Portfolio.........................................      2.05%      2.04%        1.05%      0.94%
</TABLE>
 
---------------
(1) Delinquencies include principal amounts only.
(2) The period of delinquency is based on the number of days payments are
    contractually past due.
 
                  LOAN LOSS EXPERIENCE OF SERVICING PORTFOLIO
 
<TABLE>
<CAPTION>
                                                                           FOR THE QUARTERS
                                                                            ENDED JUNE 30,
                                                                         ---------------------
                                                                           1997         1996
                                                                         --------     --------
                                                                        (DOLLARS IN THOUSANDS)
<S>                                                                      <C>          <C>
Period end contracts outstanding.......................................  $564,922     $317,054
Average servicing portfolio(1).........................................  $517,134     $290,848
Number of gross charge-offs............................................       496          153
  Gross charge-offs....................................................  $2,999.6     $1,042.5
  Net charge-offs(2)...................................................  $2,631.4     $  936.8
Annualized net charge-offs as a percent of average servicing
  portfolio............................................................      2.04%        1.29%
</TABLE>
 
---------------
(1) Average is based on daily balances.
 
(2) Net charge-offs are gross charge-offs minus recoveries of Contracts
    previously charged off.
 
                                       10
<PAGE>   11
 
LIQUIDITY AND CAPITAL RESOURCES
 
     The Company requires substantial cash and capital resources to operate its
business. Its primary uses of cash include: (i) acquisition of Contracts; (ii)
payments of dealer participation; (iii) securitization costs, including cash
held in spread accounts; (iv) settlements of hedging transactions; (v) operating
expenses; and (vi) interest expense. The capital resources available to the
Company include: (i) net interest income during the warehousing period; (ii)
contractual servicing fees; (iii) future servicing cash flows; (iv) settlements
of hedging transactions; (v) sales of contracts in Securitizations; (vi) equity
investments; and (vii) borrowings under its credit facilities.
 
     Cash used in operating activities was $56.6 million for the six months
ended June 30, 1997, compared to $36.3 million provided for the six months ended
June 30, 1996. The substantial increase in cash used in operating activities was
attributable to the fact that Contract purchases exclude Contracts sold in
securitizations by $59.6 million. Cash used in investing activities was $1.7 for
the period ended June 30, 1997 compared to $725,808 for the period ended June
30, 1996. Cash provided by financing activities was $59.1 million for the period
ended June 30, 1997, compared to $35.5 million used in financing activities for
the period ended June 30, 1996. Cash provided during the quarter ended June 30,
1997 was provided by warehouse facilities. The Company's wholly owned special
purpose subsidiary, Onyx Acceptance Financial Corporation ("OAFC"), is party to
a $200 million auto loan warehouse program (the "CP Facility") with Triple-A One
Funding Corporation ("Triple-A"). Triple-A is a commercial paper asset-backed
conduit lender sponsored by Capital Markets Assurance Corporation ("CapMAC") and
is currently rated A-1/P-1 by Standard & Poor's Ratings Group and Moody's
Investor Services, Inc., respectively. This facility provides funds to purchase
Contracts. CapMAC provides credit enhancement to Triple-A by issuing surety
bonds covering all principal and interest obligations owed by OAFC under a loan
agreement with Triple-A. In February of 1996, the Company became party to a
revolving credit facility with State Street Bank as Agent Bank (the "Revolving
Credit Facility") under which the Company may (subject to borrowing base
availability) borrow up to $20 million for working capital and expenditures for
which the Company's $200 million CP Facility is not otherwise available. The
Revolving Credit Facility replaced a prior revolving credit facility arrangement
and in doing so, the Company reduced the interest it pays under the Revolving
Facility from a 30-day LIBOR based rate to a prime rate base. Under the two year
term of the Revolving Credit Facility, the available borrowings are based on the
following collateral based formula. The Company may borrow up to the lesser of
65% of the net book value of the Company's excess servicing and trust
receivables deemed eligible by the lenders or 80% of the value of such excess
servicing and trust receivables determined by such lenders in accordance with
their collateral valuation model. The Revolving Credit Facility converts from
revolving loans to fully-amortizing two-year term loans on January 31, 1998 or
earlier upon the occurrence of certain "credit triggers."
 
     SECURITIZATIONS. In June of 1997, the Company consummated a securitization
in the amount of $121.7 million, with a pass-through rate of 6.35% and a net
interest rate spread inclusive of all costs of 3.11%. As a result of this
securitization, the Company realized a gain on sale of approximately $4.3
million.
 
     The Contracts originated and held by the Company during the warehousing
period are all fixed rate and accordingly, the Company has exposure to changes
in interest rates. The Company is able through the use of varying maturities on
advances from the CP Facility to lock in rates during the warehousing period,
when in management's judgment it is appropriate, to limit interest rate
exposure. Further, the Company employs a hedging strategy which primarily
includes the use of two-year Treasury securities forward agreements. These
hedges are entered into by the Company in numbers and amounts which generally
correspond to the anticipated principal amount of the related securitization. As
of July 31, 1997, the Company had in effect an interest rate hedge for $150
million which matures September 15, 1997 which the Company believes is adequate
to cover its next securitization.
 
                                       11
<PAGE>   12
 
PART II.  OTHER INFORMATION
 
ITEM 4. SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS.
 
     The Company held its Annual Meeting of Stockholders on May 22, 1997 (the
"Meeting"). At the Meeting the stockholders were asked to vote on the election
of two directors and to ratify the appointment of the Company's independent
auditors.
 
     1.  ELECTION OF DIRECTORS
 
     The stockholders approved the Company's director nominees, Bruce R. Hallett
and Don P. Duffy, to serve for a term of three years expiring at the Annual
Meeting in the year 2000.
 
     The voting on the nominations was as follows:
 
<TABLE>
<CAPTION>
                             NOMINEE                          VOTES FOR     VOTES WITHHELD
        --------------------------------------------------    ---------     --------------
        <S>                                                   <C>           <C>
        Bruce R. Hallett..................................    2,755,875        26,850
        Don P. Duffy......................................    2,755,625        27,100
</TABLE>
 
     In addition, there were 2,769,431 broker non-votes and no abstentions.
 
     2.  APPOINTMENT OF INDEPENDENT AUDITORS
 
     The Company's proposal to ratify the appointment of Coopers & Lybrand LLP
as the Company's independent auditors for the fiscal year ending December 31,
1997 was also approved by the stockholders. A total of 2,755,875 shares were
voted in favor, 26,850 shares against, no shares abstained and there were
2,769,431 broker non-votes.
 
ITEM 5.  OTHER INFORMATION.
 
FORWARD LOOKING INFORMATION
 
     This report, including Management's Discussion and Analysis of Financial
Condition and Results of Operations, contains certain "forward-looking
statements" within the meaning of the Private Securities Litigation Reform Act
of 1995, which can be identified by the use of forward-looking terminology such
as "may," "will," "expect," "anticipate," "estimate," "should" or "continue" or
the negative thereof or other variations thereon or comparable terminology. The
matters set forth in this Form 10-Q constitute cautionary statements identifying
important factors with respect to such forward-looking statements, including
certain risks and uncertainties, that could cause actual results to differ
materially from those in such forward-looking statements.
 
                                  RISK FACTORS
 
     Except for the historical information contained herein, the matters
discussed in this Quarterly Report are forward-looking statements which involve
risk and uncertainties, including but not limited to economic, competitive and
governmental factors affecting the Company's operations and other factors
discussed in the Company's filing with the Securities and Exchange Commission.
 
     LIQUIDITY. The Company requires substantial cash to implement its business
strategy, including cash to: (i) acquire Contracts; (ii) pay dealer
participation; (iii) pay securitization costs including cash held in spread
accounts; (iv) settle hedge transactions; (v) satisfy working capital
requirements; (vi) pay operating expenses; and (vii) pay interest expense. These
cash requirements increase as the Company's volume of purchases of Contracts
increases. A substantial portion of the Company's revenues in any period is
represented by gain on sale of Contracts in such period but the cash underlying
such revenues is received over the life of the Contracts. In addition, cash paid
by the Company for dealer participation is not recovered at the time of
securitizations, but over the life of the Contract. The Company has operated and
expects to continue to operate on a negative cash flow basis as long as the
volume of Contract purchases continues to grow. The Company has historically
funded these negative operating cash flows principally through borrowings from
 
                                       12
<PAGE>   13
 
financial institutions, sales of equity securities and sales of subordinated
notes. No assurance can be given, however, that the Company will have access to
the capital markets in the future for equity or debt issuances or for
Securitizations, or that financing through borrowings or other means will be
available on acceptable terms to satisfy the Company's cash requirements to
implement its business strategy. The Company's inability to access the capital
markets or obtain acceptable financing could have a material adverse effect on
the Company's results of operations and financial condition.
 
     DEPENDENCE ON WAREHOUSE FINANCING. The Company depends on warehousing
facilities with financial institutions to finance the purchase of Contracts
pending securitization. The Company participates in a $200 million asset-backed
commercial paper conduit program (the "CP Facility"), of which CapMAC is the
program manager, to finance 95% of the purchase price of Contracts. The CP
Facility expires in September 1999, subject to the requirement that the related
liquidity facility provided by certain banks be extended annually. The Company
currently has (subject to borrowing base availability) a $20 million secured
revolving credit facility (the "Revolving Facility") with an institutional
lender for working capital and expenditures for which the Company's $200 million
CP Facility is not otherwise available. The Revolving Facility converts on
January 31, 1998 into fully-amortizing two-year term loans maturing in February
2000. The Company's business strategy will require continued availability of
financing during the warehousing period. There can be no assurance that such
financing will be available to the Company on favorable terms. The inability of
the Company to arrange new warehousing credit facilities or to extend its
existing credit facilities when they expire would have a material adverse effect
on the Company's results of operations and financial condition. The continued
availability of the CP Facility is subject to, among other things, maintenance
of a target net yield, and compliance by the Company with certain financial
covenants contained in the sale and servicing agreement between the Company, as
seller, and OAFC, as purchaser. These covenants include a minimum ratio of
tangible net worth to total liabilities plus tangible net worth, minimum
operating cash flow, minimum amount of Contracts serviced by the Company and
minimum cash on hand. There can be no assurance, however, that the Company will
be able to comply with these covenants in the future. The continued availability
of the Revolving Facility is subject to, among other things, substantially
similar financial covenants to those of the CP Facility except that leverage is
measured as the ratio of net worth plus subordinated debt to total liabilities
plus net worth, and is tested on the last day of every month. Additionally, the
Company is subject under the documentation governing the Revolving Facility, to
minimum net worth and subordinated debt plus net worth tests, a limitation on
quarterly operating losses and covenants restricting delinquencies, losses and
prepayments of Contracts included in a Securitization.
 
     DEPENDENCE ON SECURITIZATION PROGRAM. The Company relies significantly upon
securitizations to generate cash proceeds for repayment of its Credit Facilities
and to create availability to purchase additional Contracts. Further, gain on
sale of Contracts generated by the Company's securitizations represents a
significant portion of the Company's revenues. Several factors affect the
Company's ability to complete securitizations of its Contracts, including
conditions in the securities markets generally, conditions in the asset-backed
securities market specifically, the credit quality of the Company's portfolio of
Contracts and the Company's ability to obtain credit enhancement. If the Company
were unable to profitably securitize a sufficient number of its Contracts in a
particular financial reporting period, then the Company's revenues for such
period would decline and could result in lower income or a loss for such period.
In addition, unanticipated delays in closing a securitization could also
increase the Company's interest rate risk by increasing the warehousing period
for its Contracts.
 
     DEPENDENCE ON CREDIT ENHANCEMENT. Each of the Company's securitizations has
utilized credit enhancement in the form of surety bonds issued by CapMAC in
order to achieve "AAA/Aaa" ratings. This form of credit enhancement reduces the
costs of the securitizations relative to alternative forms of credit
enhancements currently available to the Company. CapMAC is not required to
insure future securitizations nor is the Company restricted in its ability to
obtain credit enhancement from providers other than CapMAC or to use other forms
of credit enhancement. There can be no assurance that the Company will be able
to obtain credit enhancement in any form from CapMAC or any other provider of
credit enhancement on acceptable terms or that future securitizations will be
similarly rated. The Company also relies on CapMAC's surety bonds to reduce its
borrowing cost under the "A-1/P-1" rated CP Facility. A downgrading of
 
                                       13
<PAGE>   14
 
CapMAC's credit rating or CapMAC's withdrawal of credit enhancement could result
in higher interest costs for future Company securitizations and financing costs
during the warehousing period. Such events could have a material adverse effect
on the Company's results of operations and financial condition.
 
     INTEREST RATE RISK. The Company's profitability is largely determined by
the difference, or "spread," between the effective rate of interest received by
the Company on the Contracts acquired by the Company and the interest rates
payable under its Credit Facilities during the warehousing period or for
certificates issued in securitizations. Several factors affect the Company's
ability to manage interest rate risk. First, the Contracts are purchased at
fixed interest rates, while amounts borrowed under certain of the Company's
credit facilities bear interest at variable rates that are subject to frequent
adjustment to reflect prevailing rates for short-term borrowings. The Company's
policy is to increase the buy rates it posts with dealerships for Contracts in
response to increases in its cost of funds during the Warehousing period.
However, there is generally a time lag before such increased borrowing costs can
be offset by increases in the buy rates for Contracts and, in certain instances,
the rates charged by its competitors may limit the Company's ability to pass
through its increased costs of warehousing financing. Second, the spread can be
adversely affected after a Contract is purchased and while it is held during the
warehousing period by increases in the prevailing rates in the commercial paper
markets. The CP Facility permits the Company to select maturities of up to 270
days for commercial paper issued under the CP Facility. Third, the interest rate
demanded by investors in securitizations is a function of prevailing market
rates for comparable transactions and the general interest rate environment.
Because the Contracts purchased by the Company have fixed rates, the Company
bears the risk of spreads narrowing because of interest-rate increases during
the period from the date the Contracts are purchased until the closing of its
securitization of such Contracts. The Company employs a hedging strategy that is
intended to minimize this risk which historically has involved the forward sale
of U.S. Treasury securities or use of a pre-funding structure for its
securitizations. There can be no assurance, however, that this strategy will
consistently or completely offset adverse interest-rate movements during the
warehousing period or that the Company will not sustain losses on hedging
transactions. The Company's hedging strategy requires estimates by management of
monthly Contract acquisition volume and timing of its securitizations. If such
estimates are materially inaccurate, then the Company's gains on sales of
Contracts and results of operations could be adversely affected. In addition,
the Company has some interest rate exposure to falling interest rates during the
pre-funding period to the extent that the interest rates charged on Contracts
sold in a securitization with a pre-funding structure decline below the rates
prevailing at the time that the securitization closed. Such a rate decline would
reduce the interest rate spread because the interest rate on the certificates
would remain fixed. This, in time, would negatively impact the Gains on Sale of
Contracts and the Company's results of operations.
 
     DEFAULT AND PREPAYMENT RISK. The Company's results of operations, financial
condition and liquidity depend, to a material extent, on the performance of
Contracts purchased and warehoused by the Company. A portion of the Contracts
acquired by the Company may default or prepay during the warehousing period. The
Company bears the risk of losses resulting from payment defaults during the
warehousing period. In the event of a payment default, the collateral value of
the financed vehicle may not cover the outstanding Contract balance and costs of
recovery. The Company maintains an allowance for credit losses on Contracts held
during the warehousing period which reflects management's estimates of
anticipated credit losses during such period. If the allowance is inadequate,
then the Company would recognize as an expense the losses in excess of such
allowance and results of operations could be adversely affected. In addition,
under the terms of the CP Facility, the Company will not be able to borrow
against defaulted Contracts. The Company's servicing income can also be
adversely affected by prepayment or default of Contracts in the servicing
portfolio. The Company's contractual servicing revenue is based on a percentage
of the outstanding balance of such Contracts. Thus, if Contracts are prepaid or
charged-off, then the Company's servicing revenue will decline to the extent of
such prepaid or charged-off Contracts. The level of delinquency and defaults on
Contracts warehoused and securitized has increased each quarter for the reasons
discussed above under "Results of Operations -- Asset Quality."
 
     VARIABLE QUARTERLY EARNINGS. The Company's revenues and losses have
fluctuated in the past and are expected to fluctuate in the future principally
as a result of the timing and size of its securitizations. Several
 
                                       14
<PAGE>   15
 
factors affecting the Company's business can cause significant variations in its
quarterly results of operations. In particular, variations in the volume of the
Company's Contract acquisitions, the interest rate spreads between the Company's
cost of funds and the average interest rate of purchased Contracts, the
effectiveness of the Company's hedging strategies, the certificate rate for
securitizations, and the timing and size of securitizations, can result in
significant increases or decreases in the Company's revenues from quarter to
quarter. Any significant decrease in the Company's quarterly revenues could have
a material adverse effect on the Company's results of operations and its
financial condition.
 
     DEPENDENCE ON KEY PERSONNEL. The Company's future operating results depend
in significant part upon the continued service of its key senior management
personnel, none of whom is bound by an employment agreement. The Company's
future operating results also depend in part upon its ability to attract and
retain qualified management, technical, and sales and support personnel for its
operations. Competition for such personnel is intense, and there can be no
assurance that the Company will be successful in attracting or retaining such
personnel. The loss of any key employee, the failure of any key employee to
perform in his or her current position or the Company's inability to attract and
retain skilled employees, as needed, could materially adversely affect the
Company's results of operations and financial condition.
 
     COMPETITION. Competition in the field of financing retail motor vehicles
sales is intense. The automobile finance market is highly fragmented and
historically has been serviced by a variety of financial entities including the
captive finance affiliates of major automotive manufacturers, banks, savings
associations, independent finance companies, credit unions and leasing
companies. Several of these competitors have greater financial resources than
the Company and may have a significantly lower cost of funds. Many of these
competitors also have long-standing relationships with automobile dealerships
and offer dealerships or their customers other forms of financing or services
not provided by the Company. Furthermore, during the past two years, a number of
automobile finance companies have completed public offerings of common stock,
the proceeds from which are to be used, at least in part, to fund expansion and
finance increased purchases of Contracts. The Company's ability to compete
successfully depends largely upon its relationships with dealerships and the
willingness of dealerships to offer those Contracts that meet the Company's
underwriting criteria to the Company for purchase. There can be no assurance
that the Company will be able to continue to compete successfully in the markets
it serves.
 
     GEOGRAPHIC CONCENTRATION. To date, the Company has purchased the majority
of its Contracts in California. Accordingly, adverse economic conditions or
other factors particularly affecting this state could adversely affect the
delinquency, loan loss or repossession experience of the servicing portfolio.
 
     THE EFFECT OF ADVERSE ECONOMIC CONDITIONS. The Company is a motor vehicle
consumer auto finance company whose activities are dependent upon the sale of
motor vehicles. The ability of the Company to continue to acquire Contracts in
the markets in which it operates and to expand into additional markets is
dependent upon the overall level of sales of new and used motor vehicles in
those markets. A prolonged downturn in the sale of new and used motor vehicles,
whether nationwide or in the markets in which the Company operates, could have
an adverse impact upon the Company, the results of its operations and its
ability to implement its business strategy.
 
     The automobile industry generally is sensitive to adverse economic
conditions both nationwide and regionally in California and the western United
States. Periods of rising interest rates, reduced economic activity or higher
rates of unemployment generally result in a reduction in the rate of sales of
motor vehicles and higher default rates on motor vehicle loans. There can be no
assurance that such economic conditions will not occur, or that such conditions
will not result in such severe reductions in the Company's revenues or cash
flows available to the Company to permit the Company to remain current on its
credit facilities.
 
     REGULATION. The Company's business is subject to numerous federal and state
consumer protection laws and regulations, which, among other things: (i) require
the Company to obtain and maintain certain licenses and qualifications; (ii)
limit the interest rates, fees and other charges the Company is allowed to
charge; (iii) limit or prescribe certain other terms of the Company's Contracts;
(iv) require specific disclosures; and (v) define the Company's rights to
repossess and sell collateral. The Company believes it is in compliance in all
material respects with all such laws and regulations, and that such laws and
regulations have had no
 
                                       15
<PAGE>   16
 
material adverse effect on the Company's ability to operate its business.
However, the Company's failure to comply with applicable laws and regulations,
changes in existing laws or regulations, or in the interpretation thereof, or
the promulgation of any additional laws or regulations could have a material
adverse effect on the Company's results of operations and financial condition.
 
     POSSIBLE VOLATILITY OF STOCK PRICE. The market price of the Common Stock
could be subject to significant fluctuations in response to variations in
financial results or announcements of material events by the Company or its
competitors; in addition, changes in the general conditions of the economy or
financial markets could adversely affect the market price of the Common Stock.
 
     POTENTIAL MARKET IMPACT OF SHARES ELIGIBLE FOR FUTURE SALE. Sales of
substantial amounts of Common Stock on the public market could adversely affect
the market price of the Common Stock.
 
ITEM 6. EXHIBITS AND REPORTS ON FORM 8-K.
 
     (a) EXHIBITS
 
<TABLE>
<C>            <S>
     *3.1      Restated Articles of Incorporation of the Company.
     *3.2      Bylaws of the Company.
     *3.3      Amended and Restated Articles of Incorporation of the Company.
     *3.4      Form of Certificate of Incorporation of the Company, a Delaware corporation.
     *3.5      Form of Bylaws of the Company, a Delaware corporation.
     *3.6      Form of Agreement and Plan of Merger of the Company, a Delaware corporation,
               and the Company, a California corporation.
     *4.1      Specimen certificate representing shares of Common Stock of the Company.
    *10.1      Form of Indemnification Agreement of the Company, a Delaware corporation.
    *10.2      Second Amended and Restated 1994 Stock Option Plan.
    *10.3      Form of Notice of Grant of Stock Option under Second Amended and Restated 1994
               Stock Option Plan.
    *10.4      Form of Stock Option Agreement under Second Amended and Restated 1994 Stock
               Option Plan.
    *10.5      Form of Stock Purchase Agreement under Second Amended and Restated 1994 Stock
               Option Plan.
    *10.6      1994 Special Performance Option Grant Plan.
    *10.7      Form of Notice of Grant of Stock Option under 1994 Special Performance Option
               Grant Plan.
    *10.8      Form of Stock Option Agreement under 1994 Special Performance Option Grant
               Plan.
    *10.9      Form of Stock Purchase Agreement under 1994 Special Performance Option Grant
               Plan.
    *10.10     Second Amended and Restated Loan and Security Agreement between Onyx
               Acceptance Corporation and ContiTrade Services Corporation dated as of April
               17, 1995.
    *10.11     Letter Agreement between Onyx Acceptance Corporation and ContiTrade Services
               Corporation regarding extension of the Dealer Participation Note Purchase
               Facility and the Spread Account Deposit Note Purchase Facility dated August 7,
               1995.
    *10.12     Letter Agreement between Onyx Acceptance Corporation and ContiTrade Services
               L.L.C. regarding extension of Contract Purchase Facility dated as of November
               22, 1995.
    *10.13     Third Amendment to Amended and Restated Investors' Rights Agreement between
               and among Onyx Acceptance Corporation and the Investors identified therein
               dated as of November 27, 1995.
    *10.14     Warrant to purchase Common Stock in favor of ContiTrade Services Corporation
               from Onyx Acceptance Corporation dated as of February 1, 1994.
</TABLE>
 
                                       16
<PAGE>   17
 
<TABLE>
<C>            <S>
    *10.15     First Amendment to Co-Sale and First Refusal Agreement between and among Onyx
               Acceptance Corporation, ContiFinancial Services Corporation, the Investors and
               Managers, as defined therein, dated as of February 1, 1994.
    *10.16     First Amendment to and Waiver of Certain Provisions of Investors' Rights
               Agreement between Onyx Acceptance Corporation, ContiFinancial Services
               Corporation, the Investors and the Management Holders, as defined therein,
               dated as of February 1, 1994.
    *10.17     Senior Subordinated Note and Warrant Purchase Agreement between and among Onyx
               Acceptance Corporation, Capital Resource Lenders II, L.P. and Dominion Fund
               III, L.P., dated as of November 17, 1994.
    *10.18     Senior Subordinated Note due 1999 in favor of Capital Resource Lenders II,
               L.P. from Onyx Acceptance Corporation dated as of November 17, 1994.
    *10.19     Senior Subordinated Note due 1999 in favor of Dominion Fund III, L.P. from
               Onyx Acceptance Corporation dated as of November 17, 1994.
    *10.20     Warrant to purchase Common Stock in favor of Capital Resource Lenders II, L.P.
               from Onyx Acceptance Corporation dated as of November 17, 1994.
    *10.21     Warrant to purchase Common Stock in favor of Dominion Fund III, L.P. from Onyx
               Acceptance Corporation dated as of November 17, 1994.
    *10.22     Amended and Restated Co-Sale and First Refusal Agreement between and among
               Onyx Acceptance Corporation and the Shareholders identified therein dated as
               of November 17, 1994.
    *10.23     Amended and Restated Investors' Rights Agreement between and among Onyx
               Acceptance Corporation, the Investors and the Management Holders identified
               therein dated as of November 17, 1994.
    *10.24     Amended and Restated Voting Agreement between and among Onyx Acceptance
               Corporation and the Shareholders identified therein dated as of November 17,
               1994.
    *10.25     Preferred Stock Subordination Agreement between and among Onyx Acceptance
               Corporation, Capital Resource Lenders II, L.P., Dominion Fund III, L.P. and
               certain holders of Preferred Stock identified therein dated as of November 17,
               1994.
    *10.26     Subordination and Intercreditor Agreement between and among Onyx Acceptance
               Corporation, ContiTrade Services Corporation, Capital Resource Lenders II,
               L.P., Dominion Fund III, L.P., dated as of November 17, 1994.
    *10.27     Amendment of Subordination and Intercreditor Agreement dated as of April 17,
               1995, between and among Onyx Acceptance Corporation, Capital Resource Lenders
               II, L.P., Dominion Fund III, L.P. and ContiTrade Services Corporation.
    *10.28     ISDA Master Agreement between Onyx Acceptance Financial Corporation and
               Dai-Ichi Kangyo Bank, Ltd. dated as of September 8, 1994.
    *10.29     Side Letter to ISDA Master Agreement between Onyx Acceptance Corporation and
               Dai-Ichi Kangyo Bank, Ltd. dated as of September 12, 1994.
    *10.30     Sale and Servicing Agreement between Onyx Acceptance Corporation and Onyx
               Acceptance Financial Corporation dated as of September 8, 1994.
    *10.31     Triple-A One Funding Corporation Credit Agreement between and among Onyx
               Acceptance Financial Corporation, Triple-A One Funding Corporation, CapMAC
               Financial Services, Inc. and Capital Markets Assurance Corporation dated as of
               September 8, 1994.
    *10.32     Triple-A One Funding Corporation Note in favor of Onyx Acceptance Financial
               Corporation from Triple-A One Funding Corporation dated as of September 12,
               1994.
    *10.33     Triple-A One Funding Corporation Security Agreement between and among Onyx
               Acceptance Financial Corporation, Triple-A One Funding Corporation and Capital
               Markets Assurance Corporation dated as of September 8, 1994.
</TABLE>
 
                                       17
<PAGE>   18
 
<TABLE>
<C>            <S>
    *10.34     Subordinated Security Agreement between Onyx Acceptance Corporation and Onyx
               Acceptance Financial Corporation dated as of September 8, 1994.
    *10.35     Insurance and Indemnity Agreement between and among Onyx Acceptance
               Corporation, Capital Markets Assurance Corporation, Onyx Acceptance Financial
               Corporation and Triple-A One Funding Corporation dated as of September 8,
               1994.
    *10.36     Seller Note in favor of Onyx Acceptance Corporation from Onyx Acceptance
               Financial Corporation dated September 12, 1994.
    *10.37     Subordinated Note in favor of Onyx Acceptance Corporation from Onyx Acceptance
               Financial Corporation dated September 12, 1994.
    *10.38     Sublease and Administrative Services Agreement between Onyx Acceptance
               Corporation and Onyx Acceptance Financial Corporation dated as of September 8,
               1994.
    *10.39     Tax Allocation Agreement between Onyx Acceptance Corporation and Onyx
               Acceptance Financial Corporation dated as of September 1, 1994.
    *10.40     Corporate Separateness Agreement between Onyx Acceptance Corporation and Onyx
               Acceptance Financial Corporation dated September 8, 1994.
    *10.41     Amendment Number One to Security Agreement, Subordinated Security Agreement,
               Sale and Servicing Agreement and Definitions List between and among Onyx
               Acceptance Financial Corporation, Onyx Acceptance Corporation, Triple-A One
               Funding Corporation and Capital Markets Assurance Corporation dated March 1,
               1995.
    *10.42     Series B Preferred Stock Purchase Agreement between Onyx Acceptance
               Corporation and Comdisco, Inc. dated as of November 26, 1994.
    *10.43     Series B Preferred Stock Purchase Agreement between Onyx Acceptance
               Corporation and Jack Slevin dated as of November 26, 1994.
    *10.44     Series B Preferred Stock Purchase Agreement between Onyx Acceptance
               Corporation and Individuals' Venture Fund dated as of November 30, 1994.
    *10.45     First Amendment to Amended and Restated Investors' Rights Agreement between
               and among Onyx Acceptance Corporation and certain Investors identified therein
               dated as of December 15, 1994.
    *10.46     Pooling & Servicing Agreement between and among Onyx Acceptance Corporation,
               Onyx Acceptance Financial Corporation and Bankers Trust Company dated as of
               September 1, 1994.
    *10.47     Indemnification Agreement between and among Onyx Acceptance Corporation, Onyx
               Acceptance Financial Corporation, Capital Markets Assurance Corporation and
               Merrill Lynch, Pierce, Fenner & Smith Incorporated dated as of September 27,
               1994.
    *10.48     Indemnification Agreement between Onyx Acceptance Corporation and Merrill
               Lynch, Pierce, Fenner & Smith Incorporated dated as of September 28, 1994.
    *10.49     Underwriting Agreement between and among Onyx Acceptance Corporation and
               Merrill Lynch, Pierce, Fenner & Smith Incorporated dated as of September 28,
               1994.
    *10.50     Pooling & Servicing Agreement between and among Onyx Acceptance Corporation,
               Onyx Acceptance Financial Corporation and Bankers Trust Company dated as of
               April 1, 1995.
    *10.51     Indemnification Agreement between and among Onyx Acceptance Corporation and
               Merrill Lynch, Pierce, Fenner & Smith Incorporated dated as of April 11, 1995.
    *10.52     Indemnification Agreement between and among Onyx Acceptance Corporation, Onyx
               Acceptance Financial Corporation, Capital Markets Assurance Corporation,
               ContiFinancial Services Corporation and Merrill Lynch, Pierce, Fenner & Smith
               Incorporated dated as of April 11, 1995.
    *10.53     Underwriting Agreement between Onyx Acceptance Financial Corporation and Onyx
               Acceptance Corporation and Merrill Lynch, Pierce, Fenner & Smith Incorporated
               dated as of April 11, 1995.
</TABLE>
 
                                       18
<PAGE>   19
 
<TABLE>
<C>            <S>
    *10.54     Master Lease Agreement between Onyx Acceptance Corporation and Comdisco, Inc.
               dated January 7, 1994.
    *10.55     Warrant to purchase Series A Preferred Stock in favor of Comdisco, Inc. from
               Onyx Acceptance Corporation dated as of January 7, 1994.
    *10.56     Warrant to purchase Common Stock in favor of Lighthouse Capital Partners from
               Onyx Acceptance Corporation dated November 3, 1995.
    *10.57     Master Lease Agreement between Lighthouse Capital Partners and Onyx Acceptance
               Corporation dated November 3, 1995.
    *10.58     Second Amendment to Amended and Restated Investors' Rights Agreement between
               and among Onyx Acceptance Corporation and the Investors identified therein
               dated as of November 3, 1995.
    *10.59     Agreement for On-Line Services between On-Line Computer Systems, Inc. and Onyx
               Acceptance Corporation dated as of November 19, 1993.
    *10.60     Agreement for On-Line Service between On-Line Computer Systems, Inc. and Onyx
               Acceptance Financial Corporation dated as of September 7, 1994.
    *10.61     Option Agreement between Onyx Acceptance Corporation and John W. Hall dated as
               of December 20, 1994.
    *10.62     Promissory Note in favor of Onyx Acceptance Corporation from John Hall dated
               as of December 20, 1994.
    *10.63     Option Agreement between Onyx Acceptance Corporation and Brian Mac Innis dated
               as of December 20, 1994.
    *10.64     Promissory Note in favor of Onyx Acceptance Corporation from Brian MacInnis
               dated as of December 20, 1994.
    *10.65     Stock Purchase Agreement between and among Brian Mac Innis and certain
               Investors identified therein dated as of June 7, 1995.
    *10.66     Stock Purchase Agreement between and among John W. Hall and certain Investors
               identified therein dated as of June 7, 1995.
    *10.67     Sublease Agreement between Onyx Acceptance Corporation and AT&T Resource
               Management Corporation dated as of August 31, 1993.
    *10.68     Office Space Lease (Master Lease) between and among The Irvine Company and
               American Telephone and Telegraph Company dated as of April 29, 1987.
    *10.69     First Amendment To Sublease between and among AT&T Resource Management
               Corporation and Onyx Acceptance Corporation dated as of September 1, 1993.
     10.70     Onyx Acceptance Corporation 401(k) Plan dated January 1, 1994.
    *10.71     Pooling and Servicing Agreement between Onyx Acceptance Financial Corporation,
               Onyx Acceptance Corporation and Bankers Trust Company dated as of January 1,
               1996.
    *10.72     Underwriting Agreement between Onyx Acceptance Financial Corporation and
               Merrill Lynch, Pierce, Fenner & Smith Incorporated dated January 31, 1996.
    *10.73     Indemnification Agreement by and among Capital Markets Assurance Corporation,
               Onyx Acceptance Corporation, Onyx Acceptance Financial Corporation and Merrill
               Lynch, Pierce, Fenner & Smith Incorporated dated January 31, 1996.
    *10.74     Indemnification Agreement by and between Onyx Acceptance Corporation and
               Merrill Lynch, Pierce, Fenner & Smith Incorporated dated as of January 31,
               1996.
    *10.75     Excess Servicing and Trust Receivable Revolving Credit and Term Loan Agreement
               among Onyx Acceptance Corporation, State Street Bank and Trust Company and The
               First National Bank of Boston dated as of January 31, 1996.
    *10.76     Pledge and Security Agreement by and among Onyx Acceptance Corporation, State
               Street Bank and Trust Company and The First National Bank of Boston dated as
               of January 31, 1996.
</TABLE>
 
                                       19
<PAGE>   20
 
<TABLE>
<C>            <S>
    *10.77     Subordination and Intercreditor Agreement by and among State Street Bank and
               Trust Company, The First National Bank of Boston, Capital Resource Lenders II,
               L.P., Dominion Fund III and Onyx Acceptance Corporation dated as of January
               31, 1996.
    *10.78     1996-1 Spread Account Trust Agreement between Onyx Acceptance Financial
               Corporation and Bankers Trust (Delaware) dated as of February 6, 1996.
    *10.79     1995-1 Spread Account Trust Agreement between Onyx Acceptance Financial
               Corporation and Bankers Trust (Delaware) dated as of February 6, 1996.
    *10.80     1995-1 Purchase Agreement between Onyx Acceptance Corporation and Onyx
               Acceptance Financial Corporation dated as of February 6, 1996.
    *10.81     1994-1 Spread Account Trust Agreement between Onyx Acceptance Financial
               Corporation and Bankers Trust (Delaware) dated as of February 6, 1996.
    *10.82     1994-1 Purchase Agreement between Onyx Acceptance Corporation and Onyx
               Acceptance Financial Corporation dated as of February 6, 1996.
    *10.83     Form of Dealer Agreement Non-Recourse (U) between Dealership and Onyx
               Acceptance Corporation.
    *10.84     Form of Dealer Agreement Non-Recourse (N) between Dealership and Onyx
               Acceptance Corporation.
    *10.85     1996 Stock Option/Stock Issuance Plan. 11.1 Computation of Earnings per Share.
   **10.86     Form of Pooling and Servicing Agreement between Onyx Acceptance Financial
               Corporation, Onyx Acceptance Corporation and Bankers Trust Company in
               connection with 1996-2 Grantor Trust.
   **10.87     Form of Underwriting Agreement between Onyx Acceptance Financial Corporation
               and Merrill Lynch, Pierce, Fenner and Smith Incorporated in connection with
               1996-2 Grantor Trust.
   **10.88     Form of Pooling and Servicing Agreement between Onyx Acceptance Financial
               Corporation, Onyx Acceptance Corporation and Bankers Trust Company in
               connection with 1996-3 Grantor Trust.
  ***10.89     Form of Underwriting Agreement between Onyx Acceptance Financial Corporation
               and Merrill Lynch, Pierce, Fenner and Smith Incorporated in connection with
               1996-3 Grantor Trust.
  ***10.90     Form of Pooling and Servicing Agreement between Onyx Acceptance Financial
               Corporation, Onyx Acceptance Corporation and Bankers Trust Company in
               connection with 1996-4 Grantor Trust.
  ***10.91     Form of Underwriting Agreement between Onyx Acceptance Financial Corporation
               and Merrill Lynch, Pierce, Fenner and Smith Incorporated in connection with
               1996-4 Grantor Trust.
 ****10.92     Form of Pooling and Servicing Agreement between Onyx Acceptance Financial
               Corporation, Onyx Acceptance Corporation and Bankers Trust Company in
               connection with 1997-1 Grantor Trust.
 ****10.93     Form of Underwriting Agreement between Onyx Acceptance Financial Corporation
               and Merrill Lynch, Pierce, Fenner and Smith Incorporated in connection with
               1997-1 Grantor Trust.
    #10.94     Form of Pooling and Servicing Agreement between Onyx Acceptance Financial
               Corporation, Onyx Acceptance Corporation and Bankers Trust Company in
               connection with 1997-2 Grantor Trust
</TABLE>
 
                                       20
<PAGE>   21
 
<TABLE>
<C>            <S>
    #10.95     Form of Underwriting Agreement between Onyx Acceptance Financial Corporation
               and Merrill Lynch, Pierce, Fenner and Smith Incorporated in connection with
               1997-2 Grantor Trust.
     11.1      Computation of Earnings
     27.1      Financial Data Schedule.
</TABLE>
 
---------------
 
     * Incorporated by reference from the Company's Registration Statement on
       Form S-1 (Registration No. 333-680).
 
   ** Incorporated by reference from the Company's Registration Statement on
      Form S-1 (Registration No. 333-4220).
 
  *** Incorporated by reference from the Company's Registration Statement on
      Form S-1 (Registration No. 333-10461).
 
 **** Incorporated by reference from the Company's Registration Statement on
      Form S-1 (Registration No. 333-16601).
 
***** Incorporated by reference from the Company's Registration Statement on
      Form S-1 (Registration No. 333-22301).
 
     # Incorporated by reference from the Company's Registration Statement on
       Form S-1 (Registration No. 333-28893).
 
     (b) REPORTS ON FORM 8-K
 
     Form 8-K dated April 28, 1997. Item 5 providing the Distribution Date
Statement for Distribution Date of April 15, 1997 for the Onyx Acceptance
Grantor Trust 1997-1.
 
     Form 8-K dated May 28, 1997. Item 5 providing the Distribution Date
Statement for Distribution Date of May 15, 1997 for the Onyx Acceptance Grantor
Trust 1997-1.
 
     Form 8-K dated June 26, 1997. Item 5 providing the Distribution Date
Statement for Distribution Date of June 15, 1997 for the Onyx Acceptance Grantor
Trust 1997-1.
 
     Form 8-K dated July 28, 1997. Item 5 providing the Distribution Date
Statement for Distribution Date of July 15, 1997 for the Onyx Acceptance Grantor
Trust 1997-1.
 
     Form 8-K dated July 28, 1997. Item 5 providing the Distribution Date
Statement for Distribution Date of July 15, 1997 for the Onyx Acceptance Grantor
Trust 1997-2.
 
                                       21
<PAGE>   22
 
                                   SIGNATURE
 
     Pursuant to the requirements of the Securities Exchange Act of 1934, the
registrant has duly caused this report to be signed on its behalf by the
undersigned, thereunto duly authorized.
 
ONYX ACCEPTANCE CORPORATION
Date: August 13, 1997
 
By:            JOHN W. HALL
     ----------------------------------
               John W. Hall
       Chief Executive Officer and
                President
 
By:            DON P. DUFFY
     ----------------------------------
               Don P. Duffy
       Executive Vice President and
       Principal Financial Officer
 
                                       22
<PAGE>   23
 
                                 EXHIBIT INDEX
 
<TABLE>
<CAPTION>
  EXHIBIT NO.                                  DESCRIPTION                                  PAGE
  -----------   --------------------------------------------------------------------------  ----
  <C>           <S>                                                                         <C>
      11.1      Computation of Earnings Per Share
      21.1      Subsidiaries of the Registrant
      27.1      Financial Data Schedule
</TABLE>
 
                                       23