UNITED STATES
                      SECURITIES AND EXCHANGE COMMISSION
                            WASHINGTON, D.C. 20549

                                     ----

                                   FORM 10-K

                       FOR ANNUAL AND TRANSITION REPORTS
                    PURSUANT TO SECTIONS 13 OR 15(d) OF THE
                        SECURITIES EXCHANGE ACT OF 1934




     (Mark One)

       |X|  ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
            EXCHANGE ACT OF 1934

       For the fiscal year ended December 31, 2003

                                      or

       | |  TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURI-
            TIES EXCHANGE ACT OF 1934

                For the transition period from ________ to ________

                      Commission File Number:   001-31366

<TABLE>
<CAPTION>
                                           Lehman ABS Corporation,
                                                on behalf of:
             Corporate Backed Trust Certificates, Motorola Debenture-Backed Series 2002-12 Trust
             -----------------------------------------------------------------------------------
                            (Exact name of registrant as specified in its charter)

<S>                                                                     <C>
                         Delaware                                                   13-3447441
-----------------------------------------------------------             ------------------------------------
(State or other jurisdiction of incorporation or organization)          (I.R.S. Employer Identification No.)

            745 Seventh Avenue, New York, New York                                    10019
       -------------------------------------------------                ------------------------------
           (Address of principal executive offices)                                (Zip Code)
</TABLE>


     Registrant's telephone number, including area code:  (212) 526-7000

Securities registered pursuant to Section 12(b) of the Act:

<TABLE>
<CAPTION>
Title of Class                                                                    Name of Registered Exchange
--------------                                                                    ---------------------------
<S>                                                                             <C>
Corporate Backed Trust Certificates, Motorola Debenture-Backed Series           New York Stock Exchange ("NYSE")
         2002-12
</TABLE>

Securities registered pursuant to Section 12(g) of the Act:   None

<PAGE>

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
file requirements for the past 90 days.
Yes  |X|  No | |

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405
of Regulation S-K is not contained herein, and will not be contained, to the
best of registrant's knowledge, in definitive proxy or information statements
incorporated by reference in Part III of this Form 10-K or any amendment to
this Form 10-K. |X|

Indicate by check mark whether the registrant is an accelerated filer (as
defined in Rule 12b-2 of the Act).
Yes  | |  No  |X|

State the aggregate market value of the voting and non-voting common equity
held by non-affiliates computed by reference to the price at which the common
equity was last sold, or the average bid and asked price of such common
equity, as of the last business day of the registrant's most recently
completed second fiscal quarter:

     The registrant has no voting stock or class of common stock that is held
by non-affiliates.



                      DOCUMENTS INCORPORATED BY REFERENCE

The distribution reports to security holders filed on Form 8-K during the
fiscal year in lieu of reports on Form 10-Q which includes the reports filed
on Form 8-K listed in Item 15(b) hereto.

                               Introductory Note

Lehman ABS Corporation (the "Depositor") is the Depositor in respect of the
Corporate Backed Trust Certificates, Motorola Debenture-Backed Series 2002-12
Trust (the "Trust"), a common law trust formed pursuant to the Standard Terms
for Trust Agreements, dated as of January 16, 2001, between the Depositor and
U.S. Bank Trust National Association, as trustee (the "Trustee"), as
supplemented by a Series Supplement (the "Series Supplement") dated as of June
18, 2002 in respect of the Trust, as supplemented by a Supplement to the
Series Supplement, dated as of June 21, 2002. The Trust's assets consist
solely of debentures issued by Motorola, Inc. The Certificates do not
represent obligations of or interests in the Depositor or the Trustee.

Motorola, Inc., the issuer of the underlying securities, is subject to the
information reporting requirements of the Securities Exchange Act of 1934, as
amended, (the "Exchange Act"). For information on the issuer of the underlying
securities, please see its periodic and current reports filed with the
Securities and Exchange Commission (the "Commission") under Motorola, Inc.'s
Exchange Act file number, 001-07221. Periodic and current reports and other
information required to be filed pursuant to the Exchange Act by Motorola,
Inc. may be inspected and copied at the public reference facilities maintained
by the Securities and Exchange Commission at 450 Fifth Street, N.W.,
Washington, D.C. 20549. The Commission also maintains a site on the World Wide
Web at "http://www.sec.gov" at which users can view and download copies of
reports, proxy and information statements and other information filed
electronically through the Electronic Data Gathering, Analysis and Retrieval
system, or "EDGAR." Neither the Depositor nor the Trustee has participated in
the preparation of such reporting documents, or made any due diligence
investigation with respect to the information provided therein. Neither the
Depositor nor the Trustee has verified the accuracy or completeness of such
documents or reports. There can be no assurance that events affecting the
issuer of the underlying securities or the underlying securities have not
occurred or have not yet been publicly disclosed which would affect the
accuracy or completeness of the publicly available documents described above.



                                       2
<PAGE>

                                    PART I

Item 1.  Business.
         Not Applicable

Item 2.  Properties  .
         Not Applicable

Item 3.  Legal Proceedings.
         None

Item 4.  Submission of Matters To A Vote of Security Holders.
         None

                                    PART II

Item 5.  Market for Registrant's Common Equity and Related Stockholder Matters.
         The publicly offered Certificates representing investors' interest
in the Trust are represented by one or more physical Certificates registered
in the name of "Cede & Co.", the nominee of The Depository Trust Company.
Those publicly offered Certificates are listed on the NYSE.

Item 6.  Selected Financial Data.
         Not Applicable

Item 7.  Management's Discussion and Analysis of Financial Condition and
         Results of Operations.
         Not Applicable

Item 7A. Quantitative and Qualitative Disclosures About Market Risk.
         Not Applicable

Item 8.  Financial Statements and Supplementary Data.
         Not Applicable

Item 9.  Changes In and Disagreements With Accountants on Accounting and
         Financial Disclosure.
         None

Item 9A. Controls and Procedures.
         Not Applicable

                                   PART III

Item 10. Directors and Executive Officers of the Registrant.
         Not Applicable

Item 11. Executive Compensation.
         Not Applicable

Item 12. Security Ownership of Certain Beneficial Owners and Management.
         Not Applicable

Item 13. Certain Relationships and Related Transactions.
         None

Item 14. Principal Accounting Fees and Services.
         Not Applicable



                                      3
<PAGE>

                                    PART IV

Item 15. Exhibits, Financial Statements, Schedules and Reports on Form 8-K.

         (a)  The following documents have been filed as part of this report.

              1.  Trustee's Distribution Statements documented on Form 8-K
                  regarding the distributions from the Trust to the
                  certificateholders for the period from January 1, 2003
                  through and including December 31, 2003 have been filed with
                  the Securities and Exchange Commission and are hereby
                  incorporated by reference. Filing dates are listed in Item
                  15(b) below.

              2.  None

              3.  Exhibits:

                  99.1 - Certification by Senior Vice President of the
                  Registrant pursuant to 15 U.S.C. Section 7241, as adopted
                  pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.

                  99.2 - Annual Compliance Report by Trustee pursuant to 15
                  U.S.C. Section 7241, as adopted pursuant to Section 302 of
                  the Sarbanes-Oxley Act of 2002.

         (b)  The following reports on Form 8-K were filed during the period
              covered by this report:

<TABLE>
<CAPTION>
-------------------------------------------------------------------------------------- -------------------------- -----------------
                                    Trust Description                                      Distribution Date          Filed on
-------------------------------------------------------------------------------------- -------------------------- -----------------
<S>                                                                                    <C>                        <C>
Corporate Backed Trust Certificates, Motorola Debenture-Backed Series 2002-12 Trust           04/01/2003             04/25/2003
                                                                                              10/01/2003             10/14/2003
-------------------------------------------------------------------------------------- -------------------------- -----------------
</TABLE>

         (c)  See Item 15(a) above.

         (d)  Not Applicable.



                                      4
<PAGE>

                                   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.

                               Lehman ABS Corporation, as Depositor for the
                               Trust (the "Registrant")



Dated:  March 29, 2004         By:       /s/ PAUL MITROKOSTAS
                                  --------------------------------------------
                                        Name:   Paul Mitrokostas
                                        Title:  Senior Vice President



                                      5
<PAGE>

<TABLE>
<CAPTION>
                                                    EXHIBIT INDEX

           --------------------------------------------------------------------------------------------------------
               Reference
              Number per                         Description of Exhibits                        Exhibit Number
              Item 601 of                                                                      in this Form 10-K
             Regulation SK
           --------------------------------------------------------------------------------------------------------
           <S>               <C>                                                               <C>
                             Certification by Senior Vice President of the Registrant
                 (99.1)      pursuant to 15 U.S.C. Section 7241, as adopted pursuant to              99.1
                             Section 302 of the Sarbanes-Oxley Act of 2002.
           --------------------------------------------------------------------------------------------------------
                             Annual Compliance Report by Trustee pursuant to 15 U.S.C.
                 (99.2)      Section 7241, as adopted pursuant to Section 302 of the                 99.2
                             Sarbanes-Oxley Act of 2002.
           --------------------------------------------------------------------------------------------------------
</TABLE>



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