Lincoln MKZ overheating problems

Filed Oct 22, 2026 · Engine · WV

Around end of May or beginning of June 2026 a check engine light came on in our 2018 MKZ. The code showed cylinder 3 misfire. We called our local Ford dealership for diagnosis. We almost didn't get there as it started to overheat on the way. Once at Ford they diagnosed it with coolant intrusion in cylinder 3. They said this was a known issue and needed a new block. $11,500 for replacement. They said driving it could cause catastrophic problems to the vehicle and possibly the passengers in it. The vehicle had 65,873 miles on it at time and once home it has stayed in the garage since. They said warranty was over and to call Lincoln for assistance programs as it was a known safety defect. I did call and Lincoln denied any help with repairs.

Filed Oct 7, 2026 · Engine · TX

I noticed on mid Sept/2026 when I started my car the engine was idling rough for a few minutes, then went idling normal. Every morning after it repeated itself when first starting the car and my check engine light came on. I scheduled a a diagnostic with an Auto shop and it was diagnosed as Cylinder 2 misfire. Shop told me to check if coolant level is lower in the next morning, I checked it was low & had to add more coolant, also no coolant on the floor. Check Engine Light on almost every day, took it to another auto shop for 2nd opinion, had them do a coolant pressure test. The Coolant pressure test showed Cylinder 2 had coolant getting inside it. Shop found TSB 19-2208 pertaining to this issue. Repair for this was to replace engine. Found out about Miller vs Ford Class action suit online which stated Ford had a Engine Block design flaw on the 1.0 L, 1.6 L, & 2.0 L EcoBoost engines which allows coolant to leak directly into the combustion Cylinders, which could cause severe overheating. My Lincoln MKZ has the 2.0 L EcoBoost engine. Eventually my engine will fail completely if I continue to drive the car. My MKZ engine was built on 08/2018

Filed Sep 25, 2026 · Engine · MA

Head gasket and long block. I was at risk along with the public. I was driving on [XXX] when the car suddenly started to overheat and would not accelerate anymore. The problem was diagnosed today the coolant is leaking into cylinder 3. The check engine light came on and gave me p303 for a code. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Sep 23, 2026 · MA

I recently have been losing antifreeze, The car stared to overheat, the P303 engine code came on. The car hasn't been inspected yet but my mechanic said it's a sign of a long or short block issue. I've been looking the problem up. It seems to be a problem with many of these cars, a known issue with the card from 2017-2020.

Filed Sep 4, 2026 · Engine · TX

I purchased a 2017 Lincoln MKZ and began experiencing serious engine problems, including repeated overheating and an engine misfire. The vehicle developed a check-engine light and a P0301 misfire code. I was advised by a repair shop that the vehicle has a serious engine problem and that the engine needs to be replaced. I am concerned that the overheating and engine problems could cause the vehicle to suddenly lose power or suffer complete engine failure while I am driving. If the engine loses power unexpectedly while I am traveling in traffic, I could be unable to accelerate or safely move out of the way of other vehicles, creating a serious safety hazard for me, my passengers, and other motorists. I contacted Lincoln regarding these problems and asked the manufacturer for assistance, but Lincoln refused to provide assistance with the issue. I am now left responsible for addressing a potentially serious engine and safety problem. I am requesting that the federal safety agency document and investigate these engine, misfire, and overheating problems to determine whether they may be related to a safety defect affecting other 2017 Lincoln MKZ vehicles.

Filed Sep 1, 2026 · Engine · VA

In August 2026, my 2019 Lincoln MKZ equipped with the 2.0L EcoBoost engine, with approximately 39,000 miles, began experiencing repeated coolant loss, rough shaking during startup, engine misfires, temperature-gauge fluctuations toward hot, and an “Engine Coolant Over Temperature” warning while the vehicle was being driven. The warning appeared and then cleared, creating concern that the vehicle could continue operating without a persistent warning even though the engine was overheating. The climate-control system also began blowing hot air while the air conditioning was selected. Before the over-temperature warning, coolant had required frequent replacement, at times approximately once per week. An authorized Lincoln dealership performed diagnostic testing and confirmed coolant intrusion into the engine cylinders. The dealership advised that the failure matches the condition addressed in Ford’s technical service bulletin concerning coolant intrusion in certain 2.0L EcoBoost engines. The prescribed repair is replacement of the engine long-block assembly. This condition creates a safety concern because coolant entering the cylinders can cause misfires, overheating, severe engine damage, and potential loss of motive power while driving. The vehicle is currently at the authorized Lincoln dealership, and the failed engine should remain available for inspection until it is replaced. No crash, fire, or injury occurred. The manufacturer declined repair assistance because the vehicle was outside the applicable time limit, and the estimated engine replacement cost is approximately $9,620.

Filed Aug 19, 2026 · Engine · FL

On XXX, the engine in my 2019 Lincoln MKZ (Mileage 58,089) with the 2.0L EcoBoost engine suffered a catastrophic, sudden failure while driving. The vehicle began to overheat & run extremely rough, triggering multiple warning lights. It is now inoperable and unsafe to drive. The vehicle was towed to a Lincoln dealership (Tasca Lincoln in [XXX]) for diagnosis. The work order number is RO #XXX. The dealership confirmed the failure is due to a well-documented manufacturing defect known as "coolant intrusion," where the engine block cracks internally, allowing coolant to leak directly into the engine cylinders. The diagnostic trouble codes stored were P0217 (Engine Overheat Condition), P0302 (Cylinder 2 Misfire Detected), & P0316 (Misfire Detected on Startup). This issue is specifically addressed in Ford's own Technical Service Bulletin 19-2346. This coolant intrusion defect creates a critical safety hazard. The engine can lose its coolant and fail without any prior warning, leading to a complete loss of power while the vehicle is in motion. A sudden seizure of the engine at highway speeds could cause a catastrophic accident, endangering myself, my passengers, & other drivers on the road. Estimated Cost for Repair: $10,781.40 (for complete engine replacement). I contacted Lincoln Customer Relations (Case #XXX) to request assistance with this known manufacturing defect. I was informed that there is no goodwill assistance available & that my case was being forwarded to their internal Vehicle Safety Division. This confirms that Ford is aware this is a serious safety issue. This is not a normal wear-and-tear failure; it is a fundamental defect in the engine's design that Ford has acknowledged internally through its service bulletins. An engine should not fail catastrophically due to a manufacturing defect on a [XXX] vehicle. I urge the federal safety agency to investigate this defect to determine if a safety recall is warranted to protect the public. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(

Filed Aug 14, 2026 · Engine · 80,000 miles · PA

The contact owns a 2018 Lincoln MKZ. The contact stated that while driving approximately 30-35 MPH, the engine overheated. The contact pulled over and became aware that the coolant reservoir was empty. The contact added coolant to the coolant reservoir. The vehicle was taken to an independent mechanic, where it was determined that there was coolant leaking into the cylinder, which caused engine failure. The vehicle was taken to the local dealer, where it was diagnosed, and the engine was replaced. The manufacturer was contacted, but no assistance was provided. The failure mileage was approximately 80,000.

Filed Jul 30, 2026 · Engine, Fuel system · IL · fire · 1 injury

I am reporting a catastrophic engine failure and engine-compartment fire involving my 2017 Lincoln MKZ Select, equipped with a 2.0L EcoBoost engine, VIN [XXX]. The vehicle had approximately 99,864 miles when the final failure occurred. Shortly after I purchased the vehicle, the original engine developed severe overheating, loss of cabin heat, white exhaust smoke, misfiring, and coolant intrusion. On December 16, 2024, at approximately 95,354 miles, the vehicle was taken to Murgado Ford Lincoln of Chicago. The dealership documented diagnostic codes P0303 and P0316 and determined that coolant was entering cylinder No. 3. Pursuant to Ford Technical Service Bulletin 22-2229, the dealership replaced the long-block engine and related one-time-use components. The replacement service-engine assembly was identified on the repair invoice as part No. J2GZ-6006-E. The vehicle was returned to me on approximately January 30, 2025. After the engine replacement, the vehicle continued to experience serious problems. Within days, it stalled in an intersection, produced white smoke, lost cabin heat, and had to be returned to the dealership. The vehicle later continued to exhibit hesitation, harsh shifting, loss of power, and other abnormal drivability symptoms. On September 4, 2025, while I was operating the vehicle under normal driving conditions in Chicago, I heard a sudden loud metallic grinding or mechanical noise coming from the engine area. Gray smoke then began coming from the vehicle and quickly progressed into heavy dark smoke. A fire developed in the engine compartment, forcing me to stop and exit the vehicle. The fire rapidly intensified and was followed by an explosion or explosive sound. There was no collision that initiated this incident. The vehicle sustained catastrophic fire damage and was rendered a total loss. The failure occurred only approximately seven months after the replacement long-block engine was installed and after I had repeatedly experien INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION

Filed Jul 30, 2026 · Engine · TX

My engine has failed at less than 40,000 miles due to coolant leaking into the engine.