TL* THE CONTACT OWNS A 2010 LEXUS RX350. THE CONTACT STATED THAT WHILE DRIVING AT APPROXIMATE SPEEDS OF 55 MPH, THE VEHICLE ABNORMALLY ACCELERATED TO SPEEDS OF 90 MPH. THE CONTACT ALSO STATED THAT THERE WAS SMOKE COMING FROM THE TIRES WHEN HE TRIED TO APPLY THE BRAKES. HE WAS ABLE TO SHIFT THE VEHICLE TO NEUTRAL AND TURN THE IGNITION OFF TO GAIN CONTROL OF THE VEHICLE. THE VEHICLE WAS TAKEN TO THE DEALER FOR DIAGNOSTIC TESTING. THE DEALER COULD NOT DUPLICATE THE FAILURE. THE APPROXIMATE CURRENT AND FAILURE MILEAGES WERE 4,000.