The contact owns a 2022 Ford F-150. The contact stated while driving approximately 5 MPH on a mountain dirt road and taking a turn to the right, the brake pedal was depressed and the contact had a braking power failure. The contact turned the vehicle to the left and crashed into the side of the mountain. The contact stated no warning light was illuminated. The contact stated that the vehicle rolled up the side of the mountain on the passenger side. The contact stated that the vehicle rolled onto its side and was left on the roadside. The contact stated that the side curtain air bags on the driver's and passenger's side had deployed when the vehicle rolled onto its side. The contact stated that he had called for a tow, but the vehicle had not been taken to a dealer or mechanic to be diagnosed. The vehicle had not been repaired. The manufacturer had not been informed of the failure. The failure mileage was approximately 8,000.