Dinan Cars designs and manufactures aftermarket performance parts for BMW automobiles. The company was founded in 1979 by Steve Dinan and is headquartered in Opelika, Alabama. Its performance parts are marketed through a network of authorized BMW dealers, independent auto repair shops, and their website. Dinan-modified vehicles retain factory warranty coverage and qualify for BMW's Certified Pre-Owned program. 180 locations in the United States sell Dinan parts or cars, including 150 BMW dealerships.