My wife has a 2001 Elantra GLS that she bought new. Anyway, when it\nwas still under warranty the stereo (AM/FM/CD) began to turn itself on\nall by itself. Sometimes the radio would come on, sometimes the CD\nsection, even if there was no CD in the slot.\n\nThis happened sporadically, with no apparent rhyme or reason. In other\nwords it seemed not be be caused by vibration, heat, cold, damp weather\nor anything else I could think of. Luckily, Hyundai replaced the head\nunit under warranty in 2002.\n\nFlash ahead to 2007 and it's doing it again. Out of the blue. For five\nyears the unit functioned flawlessly (it still pays and sounds great).\n\nI'm wondering if there is a possible design flaw inherent in the\nfactory head unit.\n\nI would think that if there was something like an intermittent ground\nor power connection it would lose the radio presets. Also, I would\nthink that one would be able to duplicate it by subjecting the car to\nvibration.\n\nAny thoughts will be appreciated.