TL*THE CONTACT OWNS A 2005 TOYOTA MATRIX. THE CONTACT WAS DRIVING APPROXIMATELY 40 MPH WITH AN UNEXPECTED INCREASE OF ACCELERATION. THE VEHICLE CONTINUED TO TRAVEL WITH DIFFICULTY IN SLOWING DOWN, AND CRASHED INTO A VEHICLE. THE DRIVER SUSTAINED INJURY TO THE ARM; THE FRONT SEAT PASSENGER SUSTAINED BACK INJURIES. A POLICE REPORT WAS FILED. THE VEHICLE WAS TOWED TO AN AUTHORIZED DEALER WITH FRONT END DAMAGES. THE VEHICLE WAS REPAIRED FOR THE BODY DAMAGES. THE TECHNICIAN WAS UNABLE TO LOCATE A PROBLEM AND STATED THAT THE VEHICLE OPERATED NORMALLY. THE ACCELERATION FAILURE RECURRED ON A SEPARATE OCCASION. THE FAILURE MILEAGE WAS UNKNOWN. THE CURRENT MILEAGE WAS 52,000.