The contact owns a 2012 Ford Fiesta. The contact stated while driving at various speeds, the vehicle stalled. The contact stated that occasionally there was smoke coming from the engine compartment. The contact also stated that the vehicle would not restart. The contact stated no warning light was illuminated. The vehicle was towed to an independent mechanic where it was diagnosed with the battery needing to be replaced. The vehicle was repaired but the failure still occurred. The contact then towed the vehicle to another independent mechanic where it was diagnosed with nothing needing to be replaced. The manufacturer had been informed of the failure and referred the contact to the NHTSA. The failure mileage was approximately 160,000.