The contact owns a 2019 Ford F-150. The contact stated that while attempting to start the vehicle, there was an abnormal rattling sound coming from the engine. The contact stated that after several attempts, the vehicle started. There was no warning light illuminated. The vehicle was not diagnosed or repaired. The contact related to the failure to Ford Campaign Number: 21N03. The contact investigated the issue and related the failure to the cam phasers. The manufacturer was contacted and opened a case and referred the contact to the NHTSA Hotline. The failure mileage was approximately 59,000.