TL* THE CONTACT OWNS A 2009 LEXUS RX350. THE CONTACT STATED THAT WHILE TRAVELING VARIOUS SPEEDS, THE VEHICLE FAILED TO RESPOND TO DECELERATION ATTEMPTS AND CAUSED THE CONTACT TO CRASH INTO THE PRECEDING VEHICLE. THERE WERE NO INJURIES. THE VEHICLE WAS TAKEN TO A PRIVATE MECHANIC WHERE THE FAILURE COULD NOT BE DIAGNOSED. THE MANUFACTURER WAS CONTACTED ABOUT THE FAILURE. THE FAILURE MILEAGE AND VIN WAS NOT AVAILABLE.