The contact owns a 2017 Ford Escape. The contact stated that the vehicle was vibrating abnormally upon starting and while accelerating. The check engine warning light was illuminated. The contact had taken the vehicle to a local AutoZone, where a diagnostic test retrieved DTC: P0304. The contact was advised to take the vehicle to a local dealer to be diagnosed. The contact was informed that there was a misfire in cylinder #4 due to coolant intrusion. The contact stated 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 144,000.