Tl* the contact owns a 2001 lincoln navigator. while driving at an unknown speed, the vehicle overheated and exhibited numerous other mechanical issues. the contact stated that the tires were bald, the air bag light illuminated, and the brakes failed to operate. the vehicle was taken to a dealer. the technician diagnosed that the brakes, tires, and parts of the engine needed to be repaired. the manufacturer was not notified of the issue. the approximate failure mileage was 118,000.