O'Reilly Automotive, Inc., along with its subsidiary companies, functions as a leading retail and wholesale provider of automotive aftermarket products, specialized tools, supplies, and accessories across the United States. The company's comprehensive inventory includes both new and reconditioned vehicle hard parts and essential maintenance items. This expansive selection covers critical components such as alternators, batteries, brake system parts, belts, chassis and driveline components, engine parts, fuel pumps, hoses, starters, temperature control systems, and water pumps.