NHTSA Complaint #11716472 — 2019 LINCOLN NAUTILUS

Component: Engine Vehicle: 2019 Lincoln Nautilus – 2.0L EcoBoost Mileage at failure: ~76550 Incident date: August 2025 Narrative (paste this): My 2019 Lincoln Nautilus equipped with the 2.0L EcoBoost engine experienced a sudden low-coolant warning followed by rapid overheating and complete engine shutdown in August 2025 at approximately 70,000 miles. After adding coolant, the warning immediately returned and the vehicle entered reduced-power mode and became inoperable within about 20 miles, requiring towing. An independent repair facility performed diagnostic testing confirming coolant intrusion into the engine cylinders, internal engine failure, and coolant pooling in the cylinder head area. Diagnostic trouble codes included P0217, P0316, and P0128. The engine and turbocharger required full replacement at a cost exceeding $6,900 paid out of pocket. This failure matches Ford Technical Service Bulletins TSB 19-2172 and TSB 19-2346, which acknowledge coolant intrusion in 2.0L EcoBoost engines requiring long-block replacement. The failure created a serious safety hazard because the vehicle overheated and shut down during travel in extreme Arizona summer heat, leaving occupants stranded for hours awaiting a tow truck. This appears to be part of a widespread known defect involving coolant intrusion in Ford 2.0L EcoBoost engines. I am reporting this for safety investigation and defect tracking.