WAS SECOND VEHICLE AT STOP LIGHT WITH FOOT ON BRAKE. VEHICLE SUDDENLY LUNGED FORWARD OVERRIDING BRAKE, AND HIT BACK OF VEHICLE IN FRONT CAUSING DAMAGE AND POSSIBLE INJURY TO OTHER DRIVER. HAD PEDESTRIANS BEEN IN FRONT, COULD EASILY HAVE RUN OVER THEM. MONTHS PRIOR, TWICE ON SAME DAY ENGINE POWER DIED WHILE DRIVING. HYUNDAI REPLACED THROTTLE POSITION SENSOR. *TR