The contact owns a 2017 Ford Escape. The contact stated while driving at various speeds, she noticed the water meter gauge was lower than normal. The check engine warning light was illuminated. The vehicle was taken to a local independent mechanic and was diagnosed with coolant intrusion into cylinder #3. The vehicle was not repaired because the warranty had expired. Upon further inspection, the contact related the failure to TSB 19-2172; however, the vehicle was not included. The manufacturer was notified of the failure and referred the contact to the NHTSA Hotline for assistance. The failure mileage was approximately 100,511.