O'Reilly Auto Parts in Livermore is known for its friendly and helpful service. Customers report that the staff, including managers, are very friendly, courteous, and kind, often providing immediate assistance. The employees are described as great and happy, offering superior service that makes customers feel welcomed. Many note that the staff is proactive, sometimes helping customers outside the store without them needing to come inside. The store provides a range of helpful services. These include free battery testing, wiper blade and bulb installation, and Check Engine light testing, where staff will read trouble codes for customers. The location also resurfaces brake rotors and drums and can build custom hydraulic hoses. For DIY projects, the store offers a free Loaner Tool program with a refundable deposit. Customers appreciate that parts ordering is fast and that the store usually has needed items in stock. Additional conveniences like recycling used oil and oil filters are also valued. Overall, the store is praised for great service with no complications, making it a reliable destination for auto parts and assistance.