1 EXHIBIT 21.1 10-K SUBSIDIARY LIST Southwest Toyota, Inc. Texas corporation d/b/a Sterling McCall Toyota SMC Luxury Cars, Inc. Texas corporation d/b/a Sterling McCall Lexus McCall Automotive Group, Inc Delaware corporation Courtesy Nissan, Inc. Texas corporation Group 1 Ford, Inc. Texas corporation d/b/a Elgin Ford McKinney Dodge, Inc. Texas corporation Smith Automotive Group, Inc. Texas corporation Mike Smith Automotive-H, Inc. Texas corporation Mike Smith Automotive-N, Inc. Texas corporation d/b/a Mike Smith Nissan d/b/a Mike Smith Autoplex Nissan Mike Smith Autoplaza, Inc. Texas corporation d/b/a Mike Smith Honda, Mike Smith Oldsmobile, Mike Smith GMC Truck, Mike Smith Lincoln-Mercury, Mike Smith Mitsubishi Mike Smith Autoplex, Inc. Texas corporation d/b/a Mike Smith Autoplex 2000 d/b/a Mike Smith Autoplex Buick d/b/a Mike Smith Autoplex Volvo 2 d/b/a Mike Smith Autoplex Mercedes Benz d/b/a Mike Smith Autoplex Dodge Mike Smith Autoplex-A, Inc. Texas corporation d/b/a Mike Smith Acura Mike Smith Autoplex Buick, Inc. Texas corporation Mike Smith Autoplex Dodge, Inc. Texas corporation Mike Smith Autoplex-German Imports, Inc. Texas corporation d/b/a Mike Smith Autoplex Mercedes Benz Mike Smith Autoplex-Volvo, Inc. Texas corporation Mike Smith L/M, Inc. Texas corporation Mike Smith GM, Inc. Texas corporation Round Rock Nissan, Inc. Texas corporation Smith, Liu & Corbin, Inc. Texas corporation d/b/a Acura Southwest Smith, Liu & Kutz, Inc. Texas corporation Town North Imports, Inc. Texas corporation d/b/a Town North Mitsubishi Town North Nissan, Inc. Texas corporation Town North Suzuki, Inc. Texas corporation 3 Mike Smith Motors, Inc. Texas corporation Mike Smith Imports, Inc. Texas corporation d/b/a Beaumont BMW d/b/a BMW of SE Texas d/b/a Mike Smith BMW Bob Howard Automotive-A, Inc. Oklahoma corporation Bob Howard Automotive-H, Inc. Oklahoma corporation d/b/a Bob Howard Acura, Bob Howard Honda Bob Howard Chevrolet, Inc. Oklahoma corporation d/b/a Bob Howard Chevrolet, Howard Chevrolet, Bob Howard Chevrolet-Geo, Bob Howard Subaru Bob Howard Dodge, Inc. Oklahoma corporation Bob Howard Motors, Inc. Oklahoma corporation d/b/a Bob Howard Toyota Bob Howard Nissan, Inc. Oklahoma corporation Howard Automotive Group, Inc. Oklahoma corporation Howard Pontiac-GMC, Inc. Oklahoma corporation d/b/a Bob Howard Automall, Bob Howard GMC Truck, Bob Howard Pontiac, Bob Howard Chrysler-Plymouth, Bob Howard Jeep-Eagle, Bob Howard Isuzu, Bob Howard Mazda Bob Howard Automotive-East, Inc. Oklahoma corporation d/b/a South Pointe Chevrolet d/b/a Bob Howard Chevrolet 4 Foyt Motors, Inc. Texas corporation d/b/a A.J. Foyt Honda, A.J. Foyt Isuzu, A.J. Foyt Used Cars, Southwest Auto Credit Corp. Kingwood Motors-H, Inc. Texas corporation Koons Ford, Inc. Florida corporation d/b/a World Ford/Hollywood, Pines Leasing, World Ford/Pines, Car Town U.S.A. Courtesy Ford, Inc. Florida corporation d/b/a World Ford/Kendall Perimeter Ford, Inc. Delaware corporation Flamingo Ford, Inc. Florida corporation d/b/a World Ford Homestead World Automotive Group, Inc. Florida corporation Prestige Chrysler Plymouth Northwest, Ltd. Texas limited partnership GPI Atlanta, Inc. Delaware corporation MMK Interests, Inc. Texas corporation d/b/a Maxwell Dealership Group, Maxwell Automotive Group Prestige Chrysler Plymouth South, Ltd. Texas limited partnership d/b/a Maxwell Chrysler Plymouth South Maxwell Chrysler Plymouth Jeep Eagle, Ltd. Texas limited partnership d/b/a Maxwell Superstore Highland Autoplex, Inc. Texas corporation d/b/a Highland Autoplex Prestige Maxwell, Inc. Delaware corporation 5 Maxwell Ford, Ltd. Texas limited partnership d/b/a Maxwell Ford Maxwell Holdings, Inc. Delaware corporation d/b/a Maxwell Holdings Casa Chevrolet Inc. New Mexico corporation d/b/a Casa Chevrolet Casa Chrysler Plymouth Jeep Inc. New Mexico corporation d/b/a Westside Chrysler Johns Automotive Group, Inc. New Mexico corporation Sunshine Buick Pontiac GMC Truck, Inc. New Mexico corporation d/b/a Sunshine Buick Pontiac GMC Truck Luby Chevrolet Co. Delaware corporation Group 1 Realty, Inc. Delaware corporation Lubbock Motors-F, Ltd. Texas limited partnership Lubbock Motors-T, Ltd. Texas limited partnership Lubbock Automotive-M, Inc. Delaware corporation Rockwall Automotive-F, Ltd. Texas limited partnership Amarillo Motors-C, Ltd. Texas limited partnership Amarillo Motors-J, Ltd. Texas limited partnership 6 Amarillo Motors-F, Ltd. Texas limited partnership Lubbock Motors, Inc. Texas corporation Kutz Auto Group, Inc. Texas corporation Chapparal Dodge, Ltd. Texas limited partnership Colonial Chrysler-Plymouth, Ltd. Texas limited partnership Group 1 Holdings-T, Inc. Delaware corporation Group 1 Holdings-GM, Inc. Delaware corporation Group 1 Holdings-N, Inc. Delaware corporation Group 1 Holdings, Inc. Delaware corporation Delaware Acquisition-CC, L.L.C. Delaware limited liability company Delaware Acquisition-GM, L.L.C. Delaware limited liability company Delaware Acquisition-T, L.L.C. Delaware limited liability company Delaware Acquisition-F, L.L.C. Delaware limited liability company