The contact owns a 2017 Ford Fusion. The contact stated that while driving 25 MPH, the message ‘Coolant Overheating’ was displayed. There was no warning light illuminated. The vehicle was taken to a local dealer where the vehicle was diagnosed, and the contact was informed that there was coolant intrusion into the engine. The contact was informed that the engine needed to be replaced. The vehicle was not repaired. The contact referenced Customer Satisfaction Program: 21N12; as a possible cause for the failure. The manufacturer was notified of the failure. The approximate failure mileage was 174,000.