The contact owns a 2017 Ford Mustang. The contact stated that the brake fluid was depleting abnormally. The contact was adding brake fluid constantly. There were no warning lights illuminated. The contact stated that the failure was like NHTSA Campaign Number: 23V162000 (Service Brakes, Hydraulic). The contact called the local dealer, but the vehicle was not diagnosed or repaired. The manufacturer was contacted and referred the contact to the NHTSA Hotline for assistance. The failure mileage was approximately 90,000.