The contact owns a 2007 Toyota Tundra. The contact stated that occasionally while driving at various speeds on bumpy road surfaces, the fuel tank was scraping against the pavement. The contact stated that upon inspection from the outside, the contact became aware that the fuel tank was hanging abnormally low and the bracket holding up the brake lines and fuel lines were completely rusted. There were no warning lights illuminated. The vehicle was taken to an independent mechanic to be diagnosed, and the contact was informed that due to the abnormal amount of rust on the sub frame, the vehicle was not safe to be driven. The contact was informed that the entire sub frame needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The approximate failure mileage was 142,255.