O'Reilly Auto Parts is a retail chain that specializes in automotive parts, tools, and accessories. Founded in 1957 in Springfield, Missouri, the company has grown to operate thousands of stores across the United States. O'Reilly serves both professional mechanics and DIY customers, offering a wide range of products for various vehicle makes and models. In addition to selling parts, O'Reilly Auto Parts provides services such as battery testing, wiper blade installation, and check engine light diagnostics. The company is known for its knowledgeable staff, who assist customers in finding the right products for their automotive needs.