Coolant intrusion into engine cylinders (2.0L EcoBoost)
ENGINE
135 NHTSA complaints · 2025-05 → 2026-08
“Cylinder #2 misfire code repeatedly appearing even after changing spark plug and ignition coil. Took to the Ford dealer and it was determined it is an issue of coolant leakage in cylinder number 2. Ford dealer has diagnosed and performing engine replacement”
“After a local auto repair shop diagnosed the problem as a coolant contamination in cylinder 3, I was instructed to take the car to a Ford dealer because a new engine was needed. The dealer confirmed the coolant intrusion in cylinder 3 and a new engine has been ordered”
“Our 2018 Ford Edge started idling rough after spark plug change and after dealer tested it they told us it had engine coolant in #2 Cylinder and that driving it could lead to catastrophic engine failure”