The contact owns a 2008 Toyota Prius. The contact stated that while driving approximately 15 MPH, the brakes failed when pressed causing the vehicle to crash into the rear end of a second vehicle. During the crash, the air bags did not deploy and the rear driver-side seat belt had sprung outward, although no rear seat passenger was present. The second vehicle's rear driver's side passenger was later treated for an undisclosed injury. A police report was taken at the scene and the vehicle was towed away. The cause of the failure was not yet determined. The manufacturer and local dealer were notified of the failure. The failure mileage was 240,000.