The contact owns a 2017 Ford F-150. The contact stated that while attempting to start the vehicle, there was a loud rattling sound coming from the engine compartment. The check engine warning light was illuminated. The vehicle was towed to an independent mechanic and was diagnosed with the cam phaser failure. The contact was informed that the cam phaser needed to be replaced. The vehicle was not repaired. The dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was made aware of the failure and referred the contact to the NHTSA Hotline for further assistance. The approximate failure mileage was 184,000.