I WAS IN A CRASH AND I HAVE TO SAY THAT THIS IS A PROBLEM. AFTER I RECEIVED MY CAR BACK FROM THE BODY SHOP THE CAR HAS BEEN MALFUNCTIONING ! THE 2.7L HAS STUMBLE ON AND AT ACCELERATION THE FAILURE IS THE THROTTLE POSITION SWITCH THIS IS A SAFETY PROBLEM FOR ALL DRIVER'S THAT DRIVE A 2007 KIA OPTIMA. THE MALFUNCTION OCCURS FIVE TIME'S IN ONE DAY. THIS PROBLEM MAY CAUSE SEVERE OR FATAL INJURIES TO THE OCCUPANTS IN THE VEHICLE. NOTHING WAS DONE TO CORRECT THE FAILURE AND THE OLD THROTTLE POSITION SWITCH IS AVAILABLE! I REALLY THANK THAT THIS IS FOUND TO HAVE A DEFECT THAT AFFECTS SAFETY AND THE AUTOMAKERS NEED VOLUNTARILY ANNOUNCE A RECALLS ON ALL THE 2007 KIA OPTIMA THAT HAVE THE SAME THROTTLE POSITION SWITCH AS THIS VEHICLE. *TR