Coolant intrusion into engine cylinders
ENGINE
127 NHTSA complaints · 2025-10 → 2026-06 (sample of 200 most-recent of 1668 total)
“1.5 L eco boost engine FORD- COOLANT INTRUSION, cylinder 3 misfire, check engine light at 59,800 miles - known defect by Ford- needs new engine. Some models recalled but not this one (?? Why??). Cannot safely drive this vehicle. Problem diagnosed by dealer[ as well as by…”
“My 2018 Ford escape has the 1.5 liter ecoboost engine which is well documented to have a coolant intrusion issue into the cylinders resulting in the vehicle needing a new engine. The check engine light came on last week and started to run roughly. I brought the vehicle to my…”
“My 1.5L engine in my 2018 ford escape has a coolant leak which is a known problem in these cars according to the internet. There was a CSP from ford (19B37) which I did January 3, 2020 which is supposed to stop this from happening My ca does not qualify for CSP 21N12 according…”
“My 2018 Ford Escape has experienced coolant intrusion into the engine cylinders, a known issue affecting this model year. The vehicle began misfiring and consuming coolant without external leaks. The dealership confirmed the diagnostic, a Technical Service Bulletin applies to…”

