The contact owned a 2023 Ford Mustang. The contact received notification of NHTSA Campaign Number: 23V727000 (Electrical System) however, the part to do the recall repair was unavailable. The contact stated that the manufacturer exceeded a reasonable amount of time for the recall repair. The dealer had not been contacted. The contact stated that while driving approximately 20 MPH and attempting to apply the brake pedal however the vehicle failed to stop causing them to crash into a nearby apartment building. The air bags did not deploy. The vehicle was towed to their insurance. There were no warning lights illuminated. A police report was filed. The vehicle was totaled. There were no injuries There was damage to the property. The manufacturer was made aware of the failure. The approximate failure mileage was 15,000. Parts distribution disconnect.