The contact owns a 2017 Ford Escape. The contact stated while driving 30 MPH, the vehicle jerked and vibrated abnormally, and started to decelerate unintendedly. The contact stated that the check engine warning light was illuminated. The vehicle was taken to the dealer and was diagnosed with coolant intrusion in cylinder #4, causing engine failure. The contact was informed that the engine needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure, but no assistance was offered. The failure mileage was approximately 58,000.