EcoBoost coolant intrusion and engine failure
ENGINE
120 NHTSA complaints · 2025-03 → 2026-06 (sample of 200 most-recent of 537 total)
“Coolant intrusion on the cylinders due to a manufacturing issue with the Ford Ecoboost 1.5L engine manufactured between 2017-2019. This issue warrants a total engine replacement and the vehicle is currently at a Ford dealership. This can cause total engine failure while driving…”
“Presence of coolant in the engine cylinders, Ford has it as a known issue but won't issue a full recall. Causing cylinder misfires. Needs new engine. Ford design flaw!”
“At 100k miles the engine needs to be replaced for coolant intrusion. Its a 10,000 dollar repair.”

