The contact owns a 2017 Ford F-150. The contact stated that while the vehicle was parked and occupied at the residence, while attempting to start the vehicle, the contact heard an abnormal sound coming from the engine. No warning light was illuminated. The contact stated that while depressing the accelerator pedal, the vehicle started to hesitate. The vehicle was taken to dealer, where it was diagnosed that the cam phasers had failed and needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure but offered no assistance. The manufacturer referred the contact to the NHTSA Hotline to report the failure. The approximate failure mileage was 49,137.