AutoZone is the No. 1 auto parts retailer in America. We sell auto and light truck parts, chemicals and accessories through over 4,000 AutoZone stores in 48 states and the District of Columbia in the United States and 84 AutoZone stores in Mexico. We also sell automotive diagnostic and repair software through ALLDATA, diagnostic and repair information through alldatadiy.com and auto and light truck parts and accessories through AutoZone.com.