O'Reilly Auto Parts store #5816 in Hesperia, California, provides a wide range of auto parts, tools, and accessories, along with helpful store services such as free battery testing, wiper blade and bulb installation, fluid recycling, and Check Engine light testing. The store offers brake rotor and drum resurfacing, and customers can utilize the free Loaner Tool program with a refundable deposit for special tools. Staff members are known for being professional, friendly, and helpful; they remember regular customers and often have accounts ready at checkout. Customers appreciate the knowledgeable service, with staff providing options and printed information to assist with decisions. Many reviews highlight staff members' assistance in diagnosing issues and helping find the right parts quickly, especially in urgent situations. The store's location is convenient, though parking can be cramped. Overall, the business is praised for its helpful employees, good selection, and commitment to customer service, making it a reliable choice for auto repairs and parts in the area.