O'Reilly Automotive, Inc. is a specialty retailer of automotive aftermarket parts, tools, supplies, equipment and accessories in the United States. The Company sells its products to both do-it-yourself (DIY) and professional service provider customers. The Company's product line includes new and remanufactured automotive hard parts, such as alternators, starters, fuel pumps, water pumps, brake system components, batteries, belts, hoses, temperature control, chassis parts, driveline parts and engine parts; maintenance items, such as oil, antifreeze, fluids, filters, wiper blades, lighting, engine additives and appearance products, and accessories, such as floor mats, seat covers and truck accessories. The Company's stores offer various services and programs to its customers, such as used oil, oil filter and battery recycling; battery diagnostic testing; electrical and module testing; check engine light code extraction; loaner tool program; custom hydraulic hoses, and machine shops.