I have the harmon kardon sound system that came in the 16 sti limited. I got the car used & every time I got in the car I would have to remove then replace my usb thumb drive to get the reciever to recognize it. A few days ago I replaced my air filter, forgot to plug the maf & had to disconnect the battery to clear the cel. Ever since it won't read my usb except 1 time. I tried other usb & same deal. Once today the screen didn't turn on at all but if you hit power the radio would come on but not any station I recognize. I plan to contact the dealer but wonder if anyone else has had issues with this. I'm not sure if its under warranty because the car was certified preowned.