The contact owns a 2011 Tiffin RV with a Ford F53 chassis. The contact stated while driving approximately 4 MPH as the vehicle slowed for traffic the brakes failed. The contact crashed into the vehicle directly in front with no damage to the first vehicle. The contact's vehicle sustained damage to the front cap which was cracked and fractured. The contact stated no warning light was illuminated. The contact stated that the police were not called and no person involved sustained any injuries. The contact drove his vehicle home and did not take the vehicle to a dealer or independent mechanic. The contact observed and determined that the two front brake lines from the master cylinder and the rear driver's side had rusted to the point that the lines were bleeding out the brake fluid. The vehicle was not repaired. The manufacturer had been informed of the failure. The failure mileage was approximately 62,000.