TL* THE CONTACT OWNS A 2013 HYUNDAI SONATA. WHILE DRIVING 45 MPH, THE VEHICLE EMITTED LARGE AMOUNTS OF SMOKE FROM THE TAIL PIPE. IN ADDITION, WHEN SWITCHING FROM GEAR TO GEAR, THE VEHICLE MADE A LOUD BUMPING NOISE. THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE FAILURE MILEAGE WAS 91,000.