The contact owns a 2011 Mazda Rx 8. The contact stated after performing NHTSA Campaign Number: 21V744000 (Fuel System, Gasoline) while driving at 35 MPH, the contact smelled the odor of smoke in the vehicle, but no warning light illuminated. The vehicle was towed to the dealer. While the vehicle was being diagnosed, the vehicle caught on fire and burned. The contact did not have any details of the fire. The vehicle was diagnosed and stated that the catalytic converter needed to be replaced. The vehicle was not repaired. The manufacturer was not contacted. The failure mileage was 55,000.