The contact owns a 2018 Ford Focus. The contact stated that while driving at an undisclosed speed, the vehicle stalled with the check engine warning light illuminated. The vehicle was able to restart; however, the failure reoccurred. The vehicle was taken to the dealer, where it was diagnosed with transmission failure. The contact was informed that the transmission needed to be replaced. The vehicle was repaired. The manufacturer was made aware of the failure and a case was opened. The contact was referred to the NHTSA Hotline for assistance. The failure mileage was approximately 123,000.