The contact owns a 2018 Ford F-150. The contact stated while driving 35-40 in a parking lot, the arm actuator fractured on the sunroof. The contact stated that the air dam was not on the new sunroof, which made an abnormal popping sound, and the contact deemed the part was useless. There were no warning lights illuminated. The vehicle was taken to the local dealer who replaced the sunroof. The vehicle was repaired but the new sunroof was not equipped with the air dam, and the failure recurred. The manufacturer was contacted and referred the contact to the NHTSA Hotline. The failure mileage was approximately 36,000.