EXHIBIT 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the reference to our firm under the caption “Experts” in this Registration Statement (Form S-8) pertaining to the Group 1 Automotive, Inc. Deferred Compensation Plan and the Group 1 Automotive, Inc. 2007 Long Term Incentive Plan of Group 1 Automotive, Inc. and to the incorporation by reference therein of our reports dated February 21, 2007, with respect to the consolidated financial statements of Group 1 Automotive, Inc., included in its Annual Report (Form 10-K) for the year ended December 31, 2006, Group 1 Automotive, Inc. management’s assessment of the effectiveness of internal control over financial reporting, and the effectiveness of internal control over financial reporting of Group 1 Automotive, Inc., filed with the Securities and Exchange Commission.

/s/ Ernst & Young LLP

Houston, Texas
August 1, 2007