Penske Motor Group is an El Monte, California, U.S.–based, subsidiary of Penske Corporation, managed by Gregory Penske. The group operates four automobile dealerships in California: Longo Toyota and Longo Lexus in the Greater Los Angeles Area and Lexus of Stevens Creek and Mercedes-Benz of Marin in the San Francisco Bay Area. It also operates one dealership in Texas: Longo Toyota of Prosper in the Dallas–Fort Worth metroplex area.
Penske Motor Group's flagship dealership is Longo Toyota in El Monte, California, the largest car dealership in the world at over 50 acres. In addition to Toyota sales and service facilities, the El Monte dealership campus also includes a Starbucks, Subway restaurant, Verizon Wireless store, Enterprise Rent-A-Car agency, and an Automobile Club of Southern California office.