Exhibit 23.1

Consent of Independent Registered Public Accounting Firm

We consent to the incorporation by reference in Registration Statement Nos. 333-205923, 333-145034, 333-196424, 333-168365, 333-253446, 333-83260 and 333-115962 on Form S-8 of our reports dated February 14, 2024, relating to the financial statements of Group 1 Automotive, Inc. and the effectiveness of Group 1 Automotive, Inc.’s internal control over financial reporting appearing in this Annual Report on Form 10-K for the year ended December 31, 2023.

/s/ Deloitte & Touche LLP

Houston, Texas

February 14, 2024