The contact owns a 2019 Ford Expedition. The contact stated while attempting to start the vehicle, there was a rattling sound coming from the engine. The vehicle was taken to an independent mechanic to be diagnosed. The contact was informed that the cam phaser and the timing chain needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure, and the contact was referred to the NHTSA Hotline for assistance. The contact related the failure to Customer Satisfaction Program: 21B10 (Powertrain Control Module Reprogram for Cam Phaser Rattle). The failure mileage was 121,000.