Abs system. the warning lights come on and off at times and stays off for a while. the computer scan deduced that one of the abs sensors was faulty. the sensor was replaced but the problem persist. now computer scan deduces that abs module is faulty. there seems to be some kind of electrical problem that's disabling the abs system and asr (traction control system)system from this specific model. also the door locks and alarm system doesn't work properly, it never has. the driver side door don't lock the door when the alarm system is activated. in other words, anybody can break in the car without activating the alarm http://forums.vwvortex.com/zerothread?id=1542461 please check the link for more detailed info. also the hazard switch on this car was replaced by the dealer about two years ago and the problem persist. the hazard lights will only work for about 15 minutes. there seems to be a serious electrical problem that affects all the different electrical components in the vehicle, the interior lights work sometimes, other times it just won't. people in the volkswagen community refers to this as gremlins which only affect the early production of volkswagen gti/golf/jetta between 1999.5 to 2002. this electrical glitch is a real pain in back because it triggers many different problems that affect the normal operation of this vehicle. *tr