Nope; I never leave the player in the car, hot out or not. But the car does get pretty warm (I don't know if that would be enough to overheat the drive(s) before the AC cooled things off). I do know that last year, when I didn't have a working AC, I didn't have any problems with it stuttering, no matter how hot it was out, but I'm thinking that even on a 95-degree day, the car will cool back to 95 faster with the windows down than it will with the AC on YMMV).