I WAS DRIVING MY 2012 HYUNDAI SONATA TO VISIT FAMILY FOR THANKSGIVING. HALFWAY THROUGH THE TRIP I HEARD A RUBBING, GRINDING NOISE. I STOPPED AND LOOKED UNDER THE HOOD AND COULD NOT FIND THE SOURCE, BUT FIGURED IT WAS A BELT ISSUE SINCE THE CHECK ENGINE LIGHT WAS NOT ON. I CALLED THE NEARBY HYUNDAI DEALERSHIP TO SEE IF THEY KNEW WHAT IT COULD BE. THEY DID NOT BUT CHECKED MY VIN FOR RECALLS. I WAS TOLD THERE WERE NO RECALLS SO I HEADED TOWARDS THE DEALERSHIP FOR A DIAGNOSIS. SOON AFTER GETTING BACK ON THE ROAD A LOUD BANG OCCURRED AND THE EXHAUST STARTED SMOKING. I PULLED OVER TO CALL FOR A TOW AND AGAIN OPENED THE HOOD. I NOTICED A FIRE HAD STARTED UNDER THE ENGINE SO I GOT MY WIFE OUT OF THE CAR AND THE CAR BECAME FULLY ENGULFED. CALLED 911 AND A FIRE UNIT RESPONDED TO PUT OUT THE FIRE. CAR WAS THEN TOWED.