The contact’s husband owns a 2020 Ford Fusion. The contact stated while driving at various speeds, there was an abnormal rumbling sound coming from the engine. There was no warning light illuminated. The vehicle was taken to a dealer where a diagnostic test was performed. The mechanic discovered a failure with the flex plate. The contact was initially informed that the vehicle was covered under warranty; however, the contact was later informed that the engine repair was not covered under warranty. The manufacturer was notified of the failure and referred the contact to the NHTSA Hotline to report the failure. The vehicle remained with the dealer unrepaired. The failure mileage was approximately 70,000.