CAR WAS DRIVEN ABOUT 10 MILES AND THEN PARKED INSIDE AN ATTACHED GARAGE. NO ISSUES WERE PRESENT DURING THE DRIVE. THE IGNITION WAS TURNED OFF AND KEY REMOVED FROM VEHICLE. AFTER APPROXIMATELY 1 HOUR HAD PASSED THE CAR STARTED ON FIRE. FLAMES WERE VISIBLE BEHIND THE FRONT RIGHT HEADLIGHT AND FRONT RIGHT WHEEL. LUCKILY NO ONE WAS HARMED. THE FIRE CAUSED SIGNIFICANT DAMAGE TO THE GARAGE AND HOME. FIRE DEPARTMENT INVESTIGATION CONCLUDED THAT THE CAUSE OF THE FIRE WAS NOT EXTERNAL TO THE VEHICLE.