UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549

                                    FORM 11-K

                      FOR ANNUAL REPORTS OF EMPLOYEE STOCK
                      REPURCHASE SAVINGS AND SIMILAR PLANS
                        PURSUANT TO SECTION 15(D) OF THE
                         SECURITIES EXCHANGE ACT OF 1934

[X] ANNUAL REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF
    1934

    For the fiscal year end December 31, 2003

                                       OR

[ ] TRANSITION REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT
    OF 1934

    For the transition period from __________ to __________

                        Commission File Number: 000-20202

  A. Full title of the plan and the address of the plan, if different from that
                           of the issuer named below:

       CREDIT ACCEPTANCE CORPORATION 401(k) PROFIT SHARING PLAN AND TRUST

  B. Name of issuer of the securities held pursuant to the plan and the address
                       of its principal executive office:

                          CREDIT ACCEPTANCE CORPORATION

                     25505 West Twelve Mile Road, Suite 3000
                         Southfield, Michigan 48034-8339



CREDIT ACCEPTANCE CORPORATION
401(K) PROFIT SHARING PLAN AND TRUST

TABLE OF CONTENTS



                                                                                                                       PAGE
                                                                                                                    
REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM                                                                 3

FINANCIAL STATEMENTS:

   Statements of Assets Available for Benefits as of December 31, 2003 and 2002                                         4

   Statement of Changes in Assets Available for Benefits for the Year Ended December 31, 2003                           5

   Notes to Financial Statements                                                                                        6

SUPPLEMENTAL SCHEDULES:

   Form 5500, Schedule H, Part IV, Line 4i -- Schedule of Assets (Held at End of Year) as of December 31, 2003         11
   
   Form 5500, Schedule G, Question 4a -- Delinquent Participant Contributions for the Year Ended December 31, 2003     12

     All other schedules required by Section 2520.103-10 of the Department of Labor's Rules and Regulations for
     Reporting and Disclosure under the Employee Retirement Income Security Act of 1974 have been omitted
     because they are not applicable.

SIGNATURES                                                                                                             13

EXHIBIT INDEX                                                                                                          14


                                       2


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

Plan Administrator
Credit Acceptance Corporation
401(k) Profit Sharing Plan and Trust

We have audited the accompanying statements of assets available for benefits of
Credit Acceptance Corporation 401(k) Profit Sharing Plan and Trust (the "Plan")
as of December 31, 2003 and 2002, and the related statement of changes in assets
available for benefits for the year ended December 31, 2003. These financial
statements are the responsibility of the Plan's management. Our responsibility
is to express an opinion on these financial statements based on our audits.

We conducted our audits in accordance with the standards of the Public Company
Accounting Oversight Board (United States). Those standards require that we plan
and perform the audit to obtain reasonable assurance about whether the financial
statements are free of material misstatement. An audit includes examining, on a
test basis, evidence supporting the amounts and disclosures in the financial
statements. An audit also includes assessing the accounting principles used and
significant estimates made by management, as well as evaluating the overall
financial statement presentation. We believe that our audits provide a
reasonable basis for our opinion.

In our opinion, such financial statements present fairly, in all material
respects, the net assets available for benefits of the Plan as of December 31,
2003 and 2002, and the changes in net assets available for benefits for the year
ended December 31, 2003 in conformity with accounting principles generally
accepted in the United States of America.

Our audits were conducted for the purpose of forming an opinion on the basic
financial statements taken as a whole. The accompanying supplemental schedules
of assets held at year end as of December 31, 2003 and delinquent participant
contributions for the year ended December 31, 2003, are presented for the
purpose of additional analysis and are not a required part of the basic
financial statements but are supplementary information required by the
Department of Labor's Rules and Regulations for Reporting and Disclosure under
the Employee Retirement Income Security Act of 1974. The supplemental schedules
are the responsibility of the Plan's management. Such supplemental schedules
have been subjected to the auditing procedures applied in our audits of the
basic financial statements and, in our opinion, are fairly stated in all
material respects when considered in relation to the basic financial statements
taken as a whole.

/s/ Deloitte & Touche LLP

Detroit, Michigan
October 1, 2004

                                       3



CREDIT ACCEPTANCE CORPORATION
401(K) PROFIT SHARING PLAN AND TRUST

STATEMENTS OF ASSETS AVAILABLE FOR BENEFITS
DECEMBER 31, 2003 AND 2002



                                                         2003           2002
                                                      -----------    -----------
                                                               
ASSETS:
  Investments -- at fair value:
    Investments                                       $ 5,527,944    $ 3,535,502
    Participant loans                                     200,387        164,509
                                                      -----------    -----------
           Total investments                            5,728,331      3,700,011

  Receivables:
    Employer contributions                                  5,118          6,105
    Participants contributions                             84,202         60,403
    Other                                                    (265)           273
                                                      -----------    -----------

           Total receivables                               89,055         66,781
                                                      -----------    -----------

ASSETS AVAILABLE FOR BENEFITS                         $ 5,817,386    $ 3,766,792
                                                      ===========    ===========


See notes to financial statements.

                                       4


CREDIT ACCEPTANCE CORPORATION
401(K) PROFIT SHARING PLAN AND TRUST

STATEMENT OF CHANGES IN ASSETS AVAILABLE FOR BENEFITS
YEAR ENDED DECEMBER 31, 2003


                                                                   
ADDITIONS TO NET ASSETS ATTRIBUTED TO:
  Interest and dividends                                              $   49,947
  Net appreciation of investments                                      1,003,495
                                                                      ----------

           Net investment income                                       1,053,442

  Contributions:
    Employer                                                             131,700
    Participants                                                       1,053,820
    Rollovers                                                            101,873
                                                                      ----------

           Total contributions                                         1,287,393
                                                                      ----------

           Total additions                                             2,340,835

DEDUCTIONS FROM NET ASSETS ATTRIBUTED TO:
  Loan fees paid by participants                                           5,675
  Benefits paid to participants                                          281,520
  Other fees                                                               3,046
                                                                      ----------

           Total deductions                                              290,241
                                                                      ----------

           Net increase                                                2,050,594

ASSETS AVAILABLE FOR BENEFITS:
  Beginning of year                                                    3,766,792
                                                                      ----------

  End of year                                                         $5,817,386
                                                                      ==========


See notes to financial statements.

                                       5


CREDIT ACCEPTANCE CORPORATION
401(K) PROFIT SHARING PLAN AND TRUST

NOTES TO FINANCIAL STATEMENTS
YEARS ENDED DECEMBER 31, 2003 AND 2002

1.    DESCRIPTION OF THE PLAN

      The following brief description of the Credit Acceptance Corporation (the
      "Company") 401(k) Profit Sharing Plan and Trust (the "Plan"), provides
      only general information. Participants should refer to the Plan agreement
      for a more complete description of the Plan's provisions.

      GENERAL -- The Plan is a defined contribution plan available to all
      salaried and hourly-rated employees of the Company who have 90 days of
      service and are age 21 or older. It is subject to the provisions of the
      Employee Retirement Income Security Act of 1974 ("ERISA").

      CONTRIBUTIONS -- Participants may contribute up to 20% of their annual
      compensation, subject to current Internal Revenue Service ("IRS")
      limitations of $12,000 and $11,000 in 2003 and 2002, respectively, and
      other limitations based upon the participants' compensation level.
      Contributions withheld from an employee's pay on a pretax basis are not
      taxable until withdrawn from the Plan by the participant. The Company
      makes matching contributions equal to $0.50 for every $1.00 of elective
      deferred contributions made by each active participant, not to exceed
      $1,250 annually. Prior to January 1, 2004, the Company made matching
      contributions equal to $0.25 for every $1.00 of elective deferred
      contributions made by each active participant, not to exceed $625
      annually. Other contributions made by the Company are at its discretion.

      PARTICIPANT ACCOUNTS -- Each participant's account is credited with the
      participant's contribution and an allocation of the Company's contribution
      and Plan earnings. Allocations are based on participant earnings or
      account balances, as defined by the Plan.

      VESTING -- Participants are immediately vested in their voluntary
      contributions plus actual earnings thereon. Vesting in the Company
      contributions portion of their accounts plus earnings thereon is based on
      years of continuous service. A participant is 100% vested after six years
      of credited service.

      LOANS -- Subject to predefined conditions and terms, a participant may
      borrow from their fund accounts up to 50% of the participant's vested fund
      balance, not to exceed $50,000.

      PAYMENT OF BENEFITS -- On termination of service due to death, disability
      or retirement, a participant may elect to receive the value of the
      participant's vested fund balance in either a lump-sum amount or in
      installment payments.

                                       6


2.    SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

      BASIS OF PRESENTATION -- The accompanying financial statements have been
      prepared on the accrual basis of accounting.

      USE OF ESTIMATES -- The preparation of financial statements in conformity
      with accounting principles generally accepted in the United States of
      America requires management to make estimates and assumptions that affect
      the reported amounts of assets available for benefits and the reported
      amounts of additions and deductions from assets available for benefits
      during the reported period. Actual results could differ from those
      estimates. The Plan invests in various securities including U.S.
      Government securities, corporate debt instruments and corporate stocks.
      Investment securities, in general, are exposed to various risks, such as
      interest rate, credit and overall market volatility. Due to the level of
      risk associated with certain investment securities, it is reasonably
      possible that changes in the values of investment securities will occur in
      the near term and that such changes could materially affect the amounts
      reported in the statements of assets available for plan benefits.

      VALUATION OF INVESTMENTS AND INCOME RECOGNITION -- Investments are
      recorded at fair value as determined by the trustee of the Plan using
      quoted market prices. Purchases and sales of securities are recorded on a
      trade-date basis. Interest income is recorded on the accrual basis.
      Dividends are recorded on the ex-dividend date.

      PAYMENTS OF BENEFITS -- Benefits are recorded when paid.

      EXPENSES -- Plan expenses (other than loan fees) are paid by the Company.

3.    INVESTMENTS

      ABN Amro Trust Services Company ("ABN") is the Plan trustee. As of
      December 31, investments representing 5% or more of the Plan's assets are
      as follows:



                                             2003         2002
                                          ----------   ----------
                                                 
ABN Amro S&P 500 Index                    $  951,783   $  635,457
Euro-Pacific Growth Fund                     756,168      440,894
ABN Amro Income Plus Fund                    740,520      666,990
ABN Amro Balanced Fund                       685,361      554,808
Veredus Aggregate Growth Fund                646,804      330,252
Franklin Balance Sheet                       523,174      326,896
ABN Amro Growth Fund                         306,100      175,735
ABN Amro Bond Fund                           275,881      235,902
Other                                        642,153      168,568
                                          ----------   ----------
Total investments                         $5,527,944   $3,535,502
                                          ==========   ==========


                                       7


During the year ended December 31, 2003 the Plan's mutual fund investments
(including gains and losses on investments bought and sold, as well as held
during the year) appreciated (depreciated) in value as follows:


                                                      
ABN Amro S&P 500 Index                                   $   203,512
Veredus Aggregate Growth Fund                                177,069
Euro-Pacific Growth Fund                                     167,990
Franklin Balance Sheet                                       114,764
Credit Acceptance Stock Fund                                  97,103
ABN Amro Balanced Fund                                        85,243
ABN Amro Growth Fund                                          49,794
ABN Amro Mid Cap Fund                                         49,361
ABN Amro Income Plus Fund                                     31,231
Washington Mutual                                             29,317
ABN Amro Bond Fund                                            (1,889)
                                                         -----------

Net appreciation of investments                          $ 1,003,495
                                                         ===========


4.    RELATED PARTY TRANSACTIONS

      Certain Plan investments are shares of mutual funds managed by ABN Amro
      Trust Services Company. ABN Amro Trust Services Company is the trustee as
      defined by the Plan and, therefore, these transactions qualify as
      party-in-interest transactions. Fees paid by the Plan for investment
      management services were included as a reduction of the return earned on
      each fund.

5.    PLAN TERMINATION

      Although it has not expressed any intent to do so, the Company has the
      right under the Plan to discontinue its contributions at any time and to
      terminate the Plan subject to the provisions of ERISA. In the event of
      Plan termination, participants will become 100% vested in their accounts.

6.    TAX STATUS

      The Company has adopted a standardized prototype plan sponsored by ABN.
      The IRS has issued a favorable opinion letter dated August 30, 2001, in
      regards to the ABN prototype plan. The plan administrator believes that
      the Plan is currently designed and being operated in compliance with the
      applicable requirements of the Internal Revenue Code. As such, no
      provision for income taxes has been included in the Plan's financial
      statements.

                                       8


7.    NONEXEMPT PARTY-IN-INTEREST TRANSACTIONS

      The Company remitted the March 2003 participant contributions of $105,223
      to the trustee on April 22, 2003, which was later than required by
      Department of Labor ("DOL") Regulation 2510.3-102.

      The Company remitted the May 2003 participant contributions of $94,771 to
      the trustee on July 1, 2003, which was later than required by DOL
      Regulation 2510.3-102.

      The Company will file Form 5330 with the Internal Revenue Service and pay
      the required excise tax on the transactions. In addition, participant
      accounts will be credited with the amount of investment income which would
      have been earned had the participant contributions been remitted on a
      timely basis.

      The Company remitted the December 2002 participant contributions of
      $73,279 to the trustee on January 28, 2003, which was later than required
      by DOL Regulation 2510.3-102. The Company filed Form 5330 with the
      Internal Revenue Service and paid the required excise tax on the
      transaction. In addition, participant accounts were credited with the
      amount of investment income which would have been earned had the
      participant contribution been remitted on a timely basis.

                                     ******

                                       9


                             SUPPLEMENTAL SCHEDULES

                                       10


CREDIT ACCEPTANCE CORPORATION
401(K) PROFIT SHARING PLAN AND TRUST

FORM 5500, SCHEDULE H, PART IV, LINE 4i
SCHEDULE OF ASSETS (HELD AT END OF YEAR)
DECEMBER 31, 2003



                                                                        (c)                (e)
(a)                         (b)                                     DESCRIPTION          CURRENT
                     IDENTITY OF ISSUE                             OF INVESTMENT          VALUE
                                                                             
*    ABN Amro Trust Service Company:
*      ABN Amro Income Plus Fund                                  Mutual Fund         $    740,520
*      ABN Amro Bond Fund                                         Mutual Fund              275,881
*      ABN Amro Balance Fund                                      Mutual Fund              685,361
*      ABN Amro S&P 500 Index                                     Mutual Fund              951,783
       Franklin Balance Sheet                                     Mutual Fund              523,174
*      ABN Amro Growth Fund                                       Mutual Fund              306,100
       Veredus Aggregate Growth Fund                              Mutual Fund              646,804
       Euro-Pacific Growth Fund                                   Mutual Fund              756,168
       Washington Mutual                                          Mutual Fund              202,953
*      ABN Amro Mid Cap Fund                                      Mutual Fund              234,177
       Liquidity Fund                                             Mutual Fund                   94
*      Credit Acceptance Stock Trust                              Stock Trust              204,929
                                                                                      ------------
                Total investments                                                        5,527,944

*    Loans to participants, 7.45% to 11.50% maturing
       at various dates not exceeding five years                                           200,387
                                                                                      ------------

      TOTAL INVESTMENTS                                                               $  5,728,331
                                                                                      ============


*  Party-in-interest

                                       11


CREDIT ACCEPTANCE CORPORATION
401(k) PROFIT SHARING PLAN AND TRUST

FORM 5500, SCHEDULE G, QUESTION 4a --
DELINQUENT PARTICIPANT CONTRIBUTIONS
DECEMBER 31, 2003

QUESTION 4a, "DID THE EMPLOYER FAIL TO TRANSMIT TO THE PLAN ANY PARTICIPANT
CONTRIBUTIONS WITHIN THE TIME PERIOD DESCRIBED IN 29 CFR 2510.3-102," WAS
ANSWERED "YES."



                       RELATIONSHIP TO PLAN,
IDENTITY OF PARTY        EMPLOYER OR OTHER
   INVOLVED              PARTY-IN-INTEREST           DESCRIPTION OF TRANSACTIONS                           AMOUNT
                                                                                               
Credit Acceptance     Employer/Plan Sponsor     Participant contributions for employees                 $  73,279
Corporation                                     were not funded within the time period
                                                prescribed by D.O.L. Regulation 2510.3-102.
                                                The December 2002 participant contribution
                                                was deposited on January 28, 2003.

                                                Participant contributions for employees                   105,223
                                                were not funded within the time period
                                                prescribed by D.O.L. Regulation 2510.3-102.
                                                The March 2003 participant contribution
                                                was deposited on April 22, 2003.

                                                Participant contributions for employees                    94,771
                                                were not funded within the time period
                                                prescribed by D.O.L. Regulation 2510.3-102.
                                                The May 2003 participant contribution
                                                was deposited on July 1, 2003.


                                       12


                                   SIGNATURES

The Plan. Pursuant to the requirements of the Securities Exchange Act of 1934,
the trustees of the Credit Acceptance Corporation 401(k) Profit Sharing Plan and
Trust (or other persons who administer the employee benefit plan) have duly
caused this annual report to be signed on its behalf by the undersigned hereunto
duly authorized.

                                       CREDIT ACCEPTANCE CORPORATION
                                       401(k) PROFIT SHARING PLAN AND TRUST

Date: November 16, 2004                By: /s/ Douglas W. Busk
                                           ---------------------------------
                                               Douglas W. Busk
                                               Treasurer

                                       13


                                  EXHIBIT INDEX

EXHIBIT
 NUMBER          DESCRIPTION
 ------          -----------
 23.1           Consent of Deloitte & Touche LLP

                                       14