One problem related to air bag on-off switch has been reported for the 2009 Hyundai Elantra. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2009 Hyundai Elantra based on all problems reported for the 2009 Elantra.
Airbag warning light on the dash came on, was reset, and came back on constantly and reported to likely not work properly. It's expected to cost almost $2000 to replace. This began to happen only when I was driving and now is constant. Now it's essentially unsafe for anyone to sit in my front passenger seat. In addition, my tire pressure monitoring light has also come on constantly and the dealer has reportedly attempted to replace and reset and switch out the monitors in all of the tires and that indicator light has yet to be fixed. This started when the car was just turned on, stationary. I am starting to get a christmas tree looking dashboard. In addition, the door behind the driver's side has become stuck and won't open, due to reportedly allowing water in for the handle to rust. As well as about a year ago my driver's side visor just suddenly fell out of the ceiling while I was driving. This is literally the worst car I've ever owned.