Document:

March 30, 2002

BEI TECHNOLOGIES, INC.
BEI SENSORS & SYSTEMS COMPANY, INC.

         c/o BEI Technologies, Inc.
         One Post Street, Suite 2500
         San Francisco, California 94104
         Attention: Robert R. Corr/Mark Deibert

         Re:      Amendment to Note Purchase Agreement.

Gentlemen:

         Reference is made to the Note Purchase  Agreement  dated as of November
16, 1998 (as amended from time to time, the "Note Purchase  Agreement")  between
BEI Technologies, Inc., a Delaware corporation (the "Company") and BEI Sensors &
Systems  Company,  Inc., a Delaware  corporation  ("Systems";  together with the
Company,  the  "Co-Obligors"),  on the one  hand,  and each  purchaser  named on
Schedule A attached to the Note Purchase Agreement, on the other hand.

         Capitalized  terms used herein  without  definition  have the  meanings
ascribed to such terms in Schedule B of the Note Purchase Agreement.

         The  Co-Obligors  have  requested  that the Note holders amend the Note
Purchase   Agreement,   subject  to  the  conditions  and  in  reliance  of  the
representations and warranties set forth herein.

         In consideration of the foregoing recitals, the parties hereto agree as
follows:

         1. Amendment to the Note Purchase  Agreement.  Pursuant to Section 17.1
thereof, the Note Purchase Agreement is amended as follows:

                  (a) Section 10.3(b) of the Note Purchase  Agreement is amended
by adding the following proviso at the end thereof:

                  "provided,  however,  that  notwithstanding  anything  to  the
contrary in the  foregoing,  one time  charges of up to  $15,600,000  for excess
capacity and uncollectables with respect to OpticNet, Inc., a related party, and
a product line move shall be excluded from the calculation of  Consolidated  Net
Income for the purpose of  calculating  the ratio of Total Debt to

<PAGE>

Consolidated  EBITDA for each of the fiscal quarters ending March 30, 2002, June
29, 2002, September 28, 2002 and December 28, 2002."

                  (b) Section 10.5 of the Note Purchase  Agreement is amended by
adding the following proviso at the end thereof:

                  "provided,  however,  that  notwithstanding  anything  to  the
contrary in the  foregoing,  one time  charges of up to  $15,600,000  for excess
capacity and uncollectables with respect to OpticNet, Inc., a related party, and
a product line move shall be excluded from the calculation of  Consolidated  Net
Income for the purpose of calculating the ratio of Earnings  Available for Fixed
Charges to Fixed Charges for each of the fiscal  quarters ending March 30, 2002,
June 29, 2002, September 28, 2002 and December 28, 2002."

                  (c) Section 10.7 of the Note Purchase  Agreement is deleted in
its entirety and the following is inserted in lieu thereof:

                  "10.7 Restricted Payments.

                           The Company  will not, and will not permit any of its
Restricted Subsidiaries, at any time, to declare or make, or incur any liability
to declare or make, any Restricted  Payment,  unless after giving effect to such
action, on a cumulative  basis, (i) the aggregate amount of Restricted  Payments
of the  Company  and its  Restricted  Subsidiaries  declared or made at any time
after March 30, 2002 is less than the sum of (A) an  aggregate  amount  equal to
50% of the  Consolidated  Net Income for the period beginning March 31, 2002 and
ending at the end of the most recently  completed fiscal quarter of the Company,
plus (B)  $5,000,000  plus (C) the  aggregate  amount of Net Proceeds of Capital
Stock for such period; and (ii) no Default or Event of Default would exist."

         2.  Representations  and Warranties.  Each Co-Obligor  hereby certifies
that as of the date hereof the representations and warranties of such Co-Obligor
contained in Section 5 of the Note  Purchase  Agreement  are true and correct as
though  made on and as of such date  (except  to the  extent  such  specifically
relate to another date).

         3.  Condition  to  Effectiveness.  The  effectiveness  of  this  letter
agreement  is subject to the  receipt of a fully  executed  counterpart  of this
letter agreement by the Co-Obligors and Required Holders.

         4. No Waiver.  Each amendment set forth in this letter  agreement shall
be limited  precisely as written and shall not be deemed to be (a) an amendment,
consent  or  waiver  of any  other  terms or  conditions  of the  Note  Purchase
Agreement or any other document  related to the Note Purchase  Agreement,  (b) a
waiver of any right or remedy of the holders of the Notes  issued under the Note
Purchase  Agreement or (c) a consent to any future amendment,  consent or waiver
of the Note  Purchase  Agreement or any future  transaction,  event or condition
which would

<PAGE>

constitute  a Default or Event of  Default  under the Note  Purchase  Agreement.
Except  as  expressly  set forth in this  letter  agreement,  the Note  Purchase
Agreement and all related documents shall continue in full force and effect.

<PAGE>

         If you are in  agreement  with the  foregoing,  please sign the form of
acceptance on the enclosed  counterparts  of this letter  agreement,  whereupon,
subject to  satisfaction  of the condition set forth in paragraph 3 above,  this
letter  agreement will become a binding  agreement among the Co-Obligors and the
Note holders as of the date first written above.

                              Very truly yours,

                              CONNECTICUT GENERAL LIFE
                              INSURANCE COMPANY,
                              By CIGNA Investments, Inc.

                              By:
                                  ----------------------------------------------
                                  Name:
                                        ----------------------------------------
                                  Title:
                                         ---------------------------------------

                              CONNECTICUT  GENERAL LIFE
                              INSURANCE  COMPANY,
                              on behalf of one or more separate accounts
                              By CIGNA Investments, Inc.

                              By:
                                  ----------------------------------------------
                                  Name:
                                        ----------------------------------------
                                  Title:
                                         ---------------------------------------

                              ALL STATE LIFE INSURANCE COMPANY

                              By:
                                  ----------------------------------------------
                                  Name:
                                        ----------------------------------------
                                  Title:
                                         ---------------------------------------

                              By:
                                  ----------------------------------------------
                                  Name:
                                        ----------------------------------------
                                  Title:
                                         ---------------------------------------

<PAGE>

The  foregoing  letter  agreement is hereby  accepted as of the date first above
written.

BEI TECHNOLOGIES, INC.

By:
    -------------------------------------------------
     Name: John LaBoskey
     Title: Senior Vice President and
     Chief Financial Officer

By:
    -------------------------------------------------
     Name: Robert R. Corr
     Title: Vice President, Secretary, Treasurer and
     Controller

BEI SENSORS & SYSTEMS COMPANY, INC.

By:
    -------------------------------------------------
     Name: John LaBoskey
     Title: Chief Financial Officer

By:
    -------------------------------------------------
     Name: Robert R. Corr
     Title: Secretary, Treasurer and
     Controller<PAGE>

                                                                  Exhibit 10(vi)

<PAGE>

             FIRST AMENDMENT TO THE 2002 AMENDED SERVICING AGREEMENT
             -------------------------------------------------------

     THIS AMENDMENT ("Amendment") is made this 25th day of April, 2002 to that
certain 2002 Amended Servicing Agreement ("Agreement") by and between BOSTON
SERVICE COMPANY, INC. ("BSC") and AUTO LENDERS LIQUIDATION CENTER, INC. ("Auto
Lenders").

BACKGROUND
----------

     BSC and Auto Lenders wish to clarify and add items of consideration to the
Servicing Agreement, retroactive from the effective date of the Amended
Servicing Agreement. All other terms and conditions remain in full force and
effect.

Amendment to Paragraph 5 - Remarketing of Vehicles
--------------------------------------------------

     This Paragraph shall remain as stated but should clarify that the cost of
all media advertising pertaining to the sale of off-lease vehicles shall be the
responsibility of BSC.

Addition to Paragraph 9 - Consideration
---------------------------------------

     The addition of Item C - Facility Fees shall be added to the Agreement and
shall read as follows:

     BSC will provide all equipment and system support to each of the Auto
Lenders facilities that are operating under the service consideration specified
by this Agreement and, further, BSC will pay a monthly facility fee of $100,000
per month effective with the execution of this Amendment until December 31,
2004.

     IN WITNESS WHEREOF, BSC and Auto Lenders have caused this First Amendment
Agreement to the 2002 Amended Servicing Agreement to be executed by their duly
authorized corporate officers and their corporate seals to be affixed hereto the
day and year first beneath their signatures below; each intending this Amendment
shall become effective on the date first written above.

                                       AUTO LENDERS LIQUIDIATION CENTER, INC.

Attest:  /s/ Thomas F. Nicholas        By: /s/ Michael J. Wimmer
         ----------------------            --------------------------------
Assistant Secretary                    Title: President
(Corp. Seal)                           Dated:  April 25, 2002

                                       BOSTON SERVICE COMPANY, INC. t/a
                                       HANN FINANCIAL SERVICE CORP.

Attest:  Jeri L. Dooley                By: /s/ Charles L. Dovico
         ----------------------            --------------------------------
Secretary                              Title: President
(Corp. Seal)                           Dated:  April 25, 2002

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