TL*THE CONTACT OWNS A 2000 TOYOTA AVALON. THE CONTACT WAS DRIVING APPROXIMATELY 50 MPH ONTO AN ENTRANCE RAMP, PROCEEDING TO A YIELD TRAFFIC SIGNAL. UNEXPECTEDLY, THERE WAS AN INCREASE OF ACCELERATION. THE VEHICLE BEGAN TO TRAVEL UNCONTROLLABLY ACROSS AN INTERSECTION. AN OPPOSING VEHICLE CRASHED INTO THE DRIVER SIDE REAR PANEL NEAR THE TIRE. THE DRIVER SUSTAINED A SEVERE INJURY TO HIS BACK. THE POLICE WAS CALLED TO THE SCENE. THE VEHICLE WAS TOWED TO A COLLISION CENTER AND REPAIRED FOR BODY DAMAGES. THE VIN WAS UNAVAILABLE. THE CAUSE OF FAILURE HAS NOT BEEN DETERMINED. THE FAILURE MILEAGE WAS 40,000.