The contact owns a 2013 Ford Edge. The contact stated while driving 30 MPH, the brake pedal was depressed, and the vehicle failed to respond. There were no warning lights illuminated. The contact scheduled an appointment however, the contact was informed there was a customer satisfaction program related to the failure and was advised by the independent mechanic to contact the manufacturer. The contact spoke with the independent mechanic to explain the failure and was informed that the brake booster had failed; however, the independent mechanic had not diagnosed the vehicle. The dealer was not made aware of the failure. The vehicle was not repaired. The manufacturer was made aware of the failure and referred the contact to the NHTSA Hotline. The failure mileage was approximately 73,000.