TL*THE CONTACT OWNS A 2005 HYUNDAI XG350. THE CONTACT STATED THAT THE VEHICLE ATTEMPTED TO SURGE FORWARD WHILE IT WAS STOPPED WITH HIS FOOT ON THE BRAKE PEDAL. THE CONTACT APPLIED HEAVY PRESSURE TO THE BRAKE PEDAL TO KEEP THE VEHICLE STOPPED. THE FAILURE OCCURRED FOUR TIMES. ONE OF THE FAILURES RESULTED IN A CRASH. A POLICE REPORT WAS NOT FILED AND NO INJURIES WERE REPORTED. THE VEHICLE WAS TAKEN TO AN AUTHORIZED DEALER ONCE WHERE THEY WERE UNABLE TO DIAGNOSE THE FAILURE. THE VEHICLE WAS NOT REPAIRED. THE FAILURE MILEAGE WAS 1,500 AND THE CURRENT MILEAGE WAS 44,000.