EXHIBIT 23.1 INDEPENDENT AUDITORS' CONSENT We consent to the incorporation by reference in (i) Registration Statement No. 333-88014 of United Auto Group, Inc. on Form S-3 and (ii) Registration Statement Nos. 333-14971, 333-26219 and 333-50816 on Form S-8, of our report dated January 29, 2003 (except for Note 9 as to which the date is March 26, 2003), appearing in this Annual Report on Form 10-K of United Auto Group, Inc. for the year ended December 31, 2002. /s/ DELOITTE & TOUCHE LLP New York, New York March 26, 2003