We have a 2018 Ford Fusion EcoBoost. The engine started to run hot, we made an appointment to bring to dealer. Morning of the appointment car would not start. We had it towed to dealer. After several hours at the dealership they called to tell us the engine needed to be replaced, quote was $14,000. The issue they explained was coolant in the engine that corroded the engine and all parts. Not salveable, needed to be replaced. We have excellent service records on our car, always keep up with routine maintenance and have owned at least 10 Fords various makes and models. Never had an issue.