QuickLinks -- Click here to rapidly navigate through this document
EXHIBIT 32.1
CERTIFICATION PURSUANT TO
SECTION 906 OF THE SARBANES-OXLEY ACT
In connection with the Annual Report of ADESA, Inc. (the "Company") on Form 10-K for the period ended December 31, 2006 as filed with the Securities and Exchange Commission on the date hereof (the "Report"), I, David G. Gartzke, Chief Executive 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 (18 USC 1350), that:
(1) The Report fully complies with the requirements of Section 13(a) or 15(d) 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 result of operations of the Company.
/s/ David G. Gartzke David G. Gartzke Chief Executive Officer | |
February 28, 2007 | |
This certification accompanies the Report pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 and shall not, except to the extent required by the Sarbanes-Oxley Act of 2002, be deemed filed by the Company for purposes of Section 18 of the Securities Exchange Act of 1934, as amended.
QuickLinks