Well at least some locations are. I just found out today while searching for where to get a camshaft position sensor for my Neon that some Autozone locations are open 24/7! So many times have I raced across town to make it to Autozone before it closes at 10pm. Now I can just live worry free knowing that no matter what hour it is, I can go find that missing bushing or replace that faulty alternator instead of being boned until the following day. This is quite the relief for any sort of parking lot mechanic jobs!