One problem related to automatic emergency braking 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.
Abs hecu unit has failed, thus posing a safety risk. All brake lights (abs and warming brake lights), in addition to check engine light are illuminated on dash. Faulty relay recall was taken care of in timely manner (recall 188), but now fires are starting in other vehicles due to failed hecu unit (which dealership and independent mechanic has confirmed that I have). More recalls for earlier Hyundai years need to be included in recall 218 or a new recall implemented to avoid cars catching fire due to failed hecu (my car has not caught fire as of the time of this report).