The contact owns a 2020 Ford Fusion. The contact stated that upon starting the vehicle, there was an abnormal rattling sound coming from the engine compartment. No warning lights were illuminated. The vehicle was taken to the dealer, who diagnosed a failure with the crankshaft flex plate. The vehicle was not repaired. After investigating the failure, the contact related the failure to Customer Satisfaction Program: 22N12. The manufacturer was notified of the failure, a case was opened, and the contact was referred to the NHTSA Hotline for assistance. The failure mileage was 71,000.