Air bag indicator light on dash board will not go off most times, even when a 125 pound passenger is in seat. occasionally driver side seat belt alarm will not chime. had mechanic check wiring, he replaced alternator,battery still the same. kenwood stereo will not tune in from time to time, even when in my same parking space also as we are driving with shifter locked into drive, the engine seems to change gears on flat road surface as if it is in 3rd gear then goes into drive. there is nothing else i can do. already had mechanic look at these problems. no codes are showing up, but obviously there is an electrical problem that may not allow passenger air bag to deploy or driver seat belt to activate or what ever else is controlled by the electrical. also have a 2006 kia with some electrical problem that car stereo shop could not get a new stereo installed to work properly. other wise car if very affordable,not sure how safe it is. *tr