The contact owns a 2014 Chevrolet Malibu. The contact stated that while driving 20-25 MPH, there was an abnormal sound coming from the engine. The contact was unsure if any warning lights were illuminated. The vehicle was taken to Firestone, where it was diagnosed that the rotors had failed and needed to be replaced. The vehicle was not repaired. Most recently, the contact stated that the vehicle needed to be warm for the defrost system to work. The contact stated that the failure persisted. The contact related the failure to NHTSA Campaign Number: 14V240000 (SERVICE BRAKES, HYDRAULIC); however, the VIN was not included. The vehicle was not diagnosed or repaired. The failure mileage was approximately 200,000.