TL*THE CONTACT OWNS A 2001 TOYOTA PRIUS. WHILE DRIVING BETWEEN 65-70 MPH, THE VEHICLE DID NOT RESPOND WHEN THE ACCELERATOR PEDAL WAS DEPRESSED. ALL OF THE INSTRUMENT PANEL INDICATORS ILLUMINATED AND THE ENGINE SUDDENLY STALLED. THE VEHICLE COASTED TO THE SIDE OF THE ROAD AND THE ENGINE FAILED TO RESTART. WHILE THE GEAR SHIFTER WAS PLACED IN PARK, THE VEHICLE ACCELERATED UNEXPECTEDLY AND CRASHED INTO A GUARDRAIL. THE DRIVER SUSTAINED A WHIPLASH AND A POLICE REPORT WAS FILED. THE VEHICLE SUSTAINED SEVERE DAMAGE AND WAS TOWED TO AN AUTHORIZED DEALER. THE VEHICLE WAS REPAIRED FOR BODY STRUCTURE DAMAGES. THE TECHNICIAN PERFORMED DIAGNOSTIC TESTS, BUT WAS UNABLE TO DUPLICATE THE FAILURES. THE VEHICLE WAS TAKEN BACK TO THE AUTHORIZED DEALER ON FIVE SEPARATE OCCASIONS FOR IDENTICAL FAILURES, BUT THERE WERE NO RESOLUTIONS. THE FAILURE MILEAGE WAS 42,000 AND CURRENT MILEAGE WAS 68,000.