EXHIBIT 32 (b)

                            CERTIFICATION PURSUANT TO
                             18 U.S.C. SECTION 1350,
                             AS ADOPTED PURSUANT TO
                  SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

     In connection with the Quarterly Report of Credit Acceptance Corporation
(the "Company") on Form 10-Q for the period ending March 31, 2007 as filed with
the Securities and Exchange Commission on the date hereof (the "Report"), I,
Kenneth S. Booth, Chief Financial Officer of the Company, certify, pursuant to
18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley
Act of 2002, that:

     (1) The Report fully complies with the requirements of Section 13(a) of the
     Securities Exchange Act of 1934; and

     (2) The information contained in the Report fairly presents, in all
     material respects, the financial condition and results of operations of the
     Company.

                                               /s/ Kenneth S. Booth
                                               ---------------------------------
                                               Chief Financial Officer
                                               April 30, 2007