2021 Ford Explorer: engine failure

Filed Oct 26, 2026 · Engine · PA

On October 21, 2026, after an approximately one-hour round trip in our 2021 Ford Explorer, we arrived home and noticed smoke coming from under the hood. When we opened the hood, we found oil spread throughout the engine compartment. The smoke and oil leak raised concerns about a possible fire and the safety of continuing to drive the vehicle. The vehicle had recently received its second replacement engine, installed by Stuckey Ford of Bellefonte on September 2, 2026. We brought it back to that dealership on October 23. Service staff told us they believed the oil leak involved the valve cover gasket on the recently installed long block. This is a preliminary diagnosis; we have not received written confirmation of the cause. As of October 26, the vehicle remains at the dealership awaiting repair and is available there for inspection upon arrangement. Whether Ford has independently inspected this new issue is unknown. The vehicle has a history of repeated oil loss and low oil pressure warnings. The original engine was replaced under warranty in June 2024 at approximately 39,574 miles after the dealership documented oil in cylinder 2 and heavy cylinder wall scoring. In June 2026, we again reported almost no oil and a low oil warning. In July 2026, at 77,206 miles, the dealership documented excessive oil consumption and internal oil burning in cylinder 3, leading to the September replacement. Shortly after that replacement, the vehicle also displayed an overheating warning and required towing. The dealership found that a coolant hose had come off and repaired it in September. Whether warning lights or messages appeared before the October 21 oil leak and smoke incident is unknown. The repeated engine problems and this new incident have left us concerned about safely using the vehicle.

Filed Oct 10, 2026 · Engine · MI

Vehicle: 2021 Ford Explorer XLT - 2.3L EcoBoost I-4 VIN: [XXX] Odometer: 127,824 Date of failure: [XXX] Complaint Description: I am reporting a complete engine failure due to coolant intrusion on my 2021 Ford Explorer 2.3L EcoBoost. This is the known defect affecting 2016-2024 Explorer 2.3L engines. Independent shop diagnosis from attached receipt states: "Engine failure due to Head problem, which cylinder 3 + 4 and head in engine known for coolant intrusion. Cylinder Head failure, carbon build up plus Turbocharger also failure." Vehicle stored DTCs P0300, P0302, P0304, P0316 - random misfire and start-up misfire. Symptoms included rough idle on cold start, white smoke from exhaust, loss of power, check engine light. Mechanic confirmed coolant in cylinders 3 and 4 due to cylinder head failure. This matches Ford's own TSB process for coolant intrusion where if coolant is found, the long block must be replaced. Safety Risk: Loss of drive power, stalling, overheating. This occurred at 127k miles with regular maintenance. This is not wear and tear - this is the documented design defect where machining grooves in the head allow coolant to pool and leak into cylinders. I have requested Ford Customer Relationship Center (1‑866‑436‑7332) open a case for goodwill and check VIN for open recalls including 23S05 (PCM/10R60) and the June 2026 2.3L long block recall for roller finger failure. Ford has not yet issued a formal recall for coolant intrusion despite class action litigation. Request: the federal safety agency investigate and expand recall to include 2021 Explorer 2.3L EcoBoost coolant intrusion / cylinder head failures. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed May 11, 2026 · Engine · CA

2021 Ford Explorer used a work vehicle (house cleaning business) and family vehicle after hours (driving my daughter to soccer practice 4 times a week). Vehicle has been professionally and properly serviced since we first purchased it in 2021( we have been the only owners). Car has worked great not one single problem other then regular things like tires, brakes and battery all purchased and installed by Ford dealership. The day of the incident the car was working perfectly the entire day. As I drove on the freeway taking my daughter to soccer practice in the evening. I noticed the vehicle started to shake and lose all power the vehicle stopped almost completely in a matter of seconds causing cars behind us to almost crash us from behind it was a miracle no one crashed into us as we were traveling at freeway speed 60-65mph. With the little power the car had I cleared 2 lanes and parked on the side of the freeway. A friend of our picked up my daughter as we were both frightened by the incident. The vehicle gave me no alerts that there was something wrong no warnings on the Ford pass app nothing. I had the vehicle towed to Walnut Creek Ford for inspection. Ford did a diagnostic and found that the engine had a hole from the head to the block. They don’t know how this happened and say they have never seen this before. They said the vehicle is in great shape inside and out and even with 160,000 the car is very well maintained (serviced). This needs to be addressed to Ford as lives were in danger and people could have gotten hurt. They want 13,000 to repair engine, but it seems to everyone(ford technicians and second opinion mechanics) it was an engine factory defect. Vehicle suffered catastrophic engine failure while driving on freeway with no warning from the vehicle system, check engine light never came on nothing. It all happened in a matter of seconds. Engine light only came on after the vehicle was no longer drivable.

Filed May 7, 2026 · Engine · ID

I own a 2021 Ford Explorer ST (3.0L EcoBoost) with 47,680 miles. The vehicle is exhibiting a severe metallic knocking noise at idle, a flashing Check Engine Light, and a dangerous loss of motive power while driving. A certified Ford dealership technician (Kendall Ford) diagnosed the vehicle with catastrophic engine failure, requiring a full engine replacement estimated at $13,000.My vehicle is exhibiting the exact mechanical failure described in Recall 24S55 (the federal safety agency Campaign 24V635000) regarding brittle engine intake valves. Although my vehicle shares the same build year, engine type, and failure symptoms as the recalled units, Ford states my specific VIN is not currently included in the 'repair' population.The sudden loss of engine power while operating at highway speeds creates an immediate crash hazard. I request that the federal safety agency investigate whether the scope of Recall 24S55 should be expanded to include this production range.Furthermore, Ford offered a 'goodwill' assistance of approximately $3,762, which I believe is an admission of a known manufacturing defect. At the time of this failure, the vehicle was only 17 days past the 5-year warranty period and well under the 60,000-mile limit. Despite this premature failure and the safety risk, Ford refuses to cover the full replacement, leaving me with a $9,000+ bill for a defect already acknowledged in 90,000 other units.

Filed Jan 23, 2026 · Engine · PA

I was informed by the dealership that the engine issue with my 2021 Ford Explorer is the same issue for which a recall was issued. However, because my vehicle’s VIN was not included in the recall, I was required to pay for the engine replacement. I attempted to work with the dealership to have them coordinate with the manufacturer, but they declined to do so. I then contacted the manufacturer directly to file a complaint and request a review of the issue. I was advised that there was nothing they could do because my VIN is not listed under the recall. I am requesting that the manufacturer investigate this matter further and reimburse me for the repair costs if it is determined that the issue is applicable to my vehicle.

Filed Jan 8, 2026 · Engine · NY

Police car started to run rough at low speed. Stalled in middle of road. Scanned codes and code for Catalytic converter showed up along with misfires from numerous cylinders. Brought to dealer and was told needed plugs and a wire. Vehicle was returned and the same issue occurred. Fixed again. Picked up and once again the same issue started. Turned around and brought it back to dealer. The mechanic stated he never checked the catalytic converter as he was never told it had a code for the converter being bad. Two weeks later I am informed that Cylinder 5 is bad. No compression. Two issues. Ford upped the warranty on the catalytic converters because of this common problem. The tech sheet shows that a bad cat will cause misfires, but never checked. Second issue is the recall 24s55 was for fords with a 3.o liter engine, built in Chicago, between the dates of 7/21 and 10/21. My vehicle was built in Chicago on 9/21 and has a 3.0 liter engine. I also received the post card regarding the recall and we had brought it t o the dealer. 24s55 states the valve could cause engine failure. Well now I have a bad engine. Ford says no recall even though prior Chief brought to dealer after receiving postcard for recall.

Filed Dec 2, 2025 · Engine · LA

My explorer is only 4 years old and it suddenly suffered catastrophic engine failure due to low engine oil. The engine started knokcing and clattering BEFORE any warning lights came on the dash. This could also be due to premature bearing failure which is common in the 3.0 ecboost engines.

Filed Oct 17, 2025 · Engine · MO

The contact owns a 2021 Ford Explorer. The contact stated that while driving approximately 30 MPH, the check engine warning light illuminated, and there was a burning odor coming from the vehicle. The contact pulled over and parked and allowed the vehicle to cool down before driving back to the residence. The vehicle was towed to the dealer and was diagnosed with coolant intrusion into the engine and the oil main bearings, causing engine failure. The contact was informed that the engine needed to be replaced. The contact received a notification of the federal safety agency Campaign Number: 24V635000 (Engine and Engine Cooling); however, the VIN was not included in the recall. The vehicle was not repaired. The manufacturer was not informed of the failure. The failure mileage was unknown.

Filed Mar 25, 2025 · Engine · WI

We were driving the vehicle when we experienced a sudden loss of power and acceleration. We also noticed odors of gas. We took it to a Ford authorized dealership and they said it was due to antifreeze in the oil from what they said was a leaking water pump. They recommended a new engine due to the difficulty of changing the internal water pump and the fact it leaked antifreeze into the engine oil, possibly damaging the engine itself. This was the explanation for the fault codes, random gas odors, and loss of power. It was explained this was normal when the sensors detect something wrong with the oil in the engine. Estimated cost provided by the dealership was $11,000 to replace the engine.

Filed Mar 7, 2025 · Engine · IL

I had complete engine failure on my 2021 115,000 mi Ford Explorer ST. The truck was only 3 years old. I heard a knocking noise and pulled over. Throughout the summer smoke had been coming out of the exhaust pipe every time I turned on the car before work. There was a cloud of smoke. A week before the engine failure I had the vehicle in the ford shop. They said everything was fine. I towed the vehicle to Currie Ford in Frankfort and they stated that there was catastrophic engine failure. Nothing could be done but I needed to put a new $12,000 engine in a $63,000 car. They said the warranty did not cover nor do I have any recourse. The safety of my family was placed at risk., I was travelling with my family, my wife, son, daughter, nephew who is [XXX] old and niece who is [XXX] . It left us stranded. There were no warnings. The dealership inspected the car a week before and said it was good to go. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed May 22, 2024 · Engine · OR

I have a catastrophic engine failure. The dealership (Doherty Ford) in Forest Grove Or acknowledges it. They are working with me. However, Ford has not responded to the dealers request for warranty work. It will be two weeks since I took the car to the dealer with a loud ticking noise. Dealer found a BUNCH of metal in the oil. I'm waiting to hear how Ford will fix it. The car has 45k on it. They also gave me an extended warranty because of all the issues I had with the car when I first got it. The [XXX] steering coupler to the rack was loose and almost came off when I drove it home. I have had a number of other issues. All dealer repaired. The car has also been to Doherty Ford almost exclusively for all its oil changes. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Apr 13, 2023 · Engine · 15,500 miles · VA

Last month out of the blue, my 2021 Ford Explorer ST with 15,500 miles would not start. Attempts to jump it were futile. I then had it towed in to the local Ford dealer. At first, they were thinking the starter. A few days later, I got a call saying they could not hand crank the motor as it seized up. In addition to that, they found pieces of metal from the piston in the oil pan. The dealer took apart the intake manifold and found that the valve keeper failed thus dropping the intake valve into the #5 cylinder. This necessitated replacement of the engine, both turbos and even the flywheel and torque converter. This is a known issue with the 2021 Broncos and is even being investigated by the federal safety agency. I just wanted to bring awareness that this can happen to the 2021 Explorer with the 3.0 Ecoboost as it was built in the same factory as the Bronco 2.7 and is a similar engine. I can provide the repair invoice upon request. I couldn't get it to upload.