CONSUMER WAS TRAVELING ABOUT 55 MPH AND WITHOUT WARNING THE HEAT WENT OFF. THERE WAS RATTLING NOISE COMING FROM UNDERNEATH THE VEHICLE. THEN, VEHICLE STARTED TO LOSE SPEED. CONSUMER WAS LOOKING OUT OF REARVIEW MIRROR AND NOTICED BLACK SMOKE COMING FROM THE MANIFOLD. CONSUMER APPLIED EMERGENCY LIGHTS AND VEERED OVER TO THE SHOULDER LANE, AND SHE WAS STRUCK BY A TRUCK ON THE REAR. CAR WAS TOWED. CONSUMER SUFFERED INTERNAL INJURIES.*AK