The contact owns a 2015 Ford Fusion. While the contact’s wife was driving at an undisclosed speed, there was an engine misfire with the check engine warning light illuminated. The vehicle was towed to an independent mechanic and was diagnosed with coolant intrusion, which caused engine failure. The contact was informed that the engine needed to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failure but provided no assistance. The contact was advised to contact the NHTSA Hotline to report the failure. The failure mileage was approximately 99,500.