The contact owns a 2013 Ford F-150. The contact stated that while driving 30-35 MPH, the vehicle unexpectedly applied the brakes on two occasions. There were no warning lights illuminated. The contact stated that the failure was related to NHTSA Campaign Number: 15V614000 (Forward Collision Avoidance). The local dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was not contacted. The failure mileage was approximately 156,000.