O Reilly Auto Parts is a publicly traded chain of auto parts stores that started in Springfield, Mo., in 1957. It has since grown to more than 1,830 stores in over 25 states with nearly 23,000 employees. In addition to parts and spares, O Reilly Auto Parts offers a range of in-store services, such as battery and electrical testing, rotor resurfacing, fluid recycling and tool rental. The company is affiliated with several motor racing associations and offers a variety of related merchandise. O Reilly Auto Parts sells replacement parts and accessories for all makes and models of sedans, trucks, sport utility vehicles, vans, minibuses, motorcoaches and recreational vehicles. It offers online shopping options and also provides gift cards. O Reilly Auto Parts maintains several locations in Houston.