The contact owns a 2012 Ford Focus. The contact stated that while driving at an undisclosed speed, the brake pedal was depressed but the brakes failed to stop the vehicle. The failure caused the vehicle to rear-end another vehicle. The contact sustained back injuries and scratches from the seat belt; however, medical attention was not yet received. A police report was filed. The contact then parked the vehicle in a parking lot, where it remained. The vehicle was not deemed totaled by the insurance company due to a lapse in insurance coverage. The manufacturer was made aware of the failure. The contact stated that prior to the failure, the vehicle lost motive power with the ABS, TPMS, and brake warning lights illuminated. The vehicle was taken to the dealer, where it was diagnosed with transmission failure, and the ABS, TPMS, and brake sensors were faulty, causing the battery to drain rapidly. The dealer replaced the transmission and the sensors for the ABS, TPMS, and brakes; however, the failure recurred. The failure mileage was approximately 101,000.