TL* THE CONTACT OWNS A 2012 KIA OPTIMA. WHILE DRIVING APPROXIMATELY 40 MPH, THE VEHICLE SHOOK AND STALLED WITHOUT WARNING. DURING THE FAILURE, A KNOCKING NOISE WAS HEARD FROM THE ENGINE COMPARTMENT. THE CONTACT EXITED THE VEHICLE, LIFTED THE HOOD, REMOVED THE OIL CAP, AND NOTICED SMOKE. FURTHERMORE, THE CONTACT SMELLED A BURNING ODOR AS SMOKE ESCAPED FROM THE VEHICLE. A POLICE REPORT WAS NOT FILED AND THERE WERE NO INJURIES. THE VEHICLE WAS TOWED TO THE CONTACT'S RESIDENCE. A DEALER AND THE MANUFACTURER WERE NOT MADE AWARE OF THE FAILURE. THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED. THE FAILURE MILEAGE WAS APPROXIMATELY 148,000.