2018 Ford Explorer Engine Problems

I PURCHASED A 2018 FORD EXPLORER WITH THE 2.3L 4 CYLINDER ENGINGE IN 2023. WITHIHN A YEAR OF MY ENGINE STARTED TO HAVE ISSUES HESITATING WHEN ACCELERATING. THEN IT OVERHEATED AND I REALIZED MY COOLANT WAS DISAPPEARING BUT WASNT POOLING ANYWHERE.. IT WAS EVAPORATING BECAUSE IT WAS LEAKING INTO MY SPARK PLUGS. WHEN I CHANGED PLUGS I NOTICED OIL OR COOLANT ON TWO OF THEM I CALLED FORD ABOUT IT BECAUSE MY ENGINE HAS A PENDING LAWSUIT FOR THIS PROBLEM IT KEPT GETTING WORSE . I DONT HAVE THE MONEY FOR THE REPAIRS AND I ASKED THEM IF THEY COULD DO A GOOD FAITH REPAIR AND I WAS DENIED. AS OF 4/16/2026 MY ENGINE FAILED AND MY COOLANT IS FILLED WITH OIL BECAUSE OF THE DEFECTIVE ENGINE THAT THEY KNEW ABOUT SINCE 2010

At 89k miles, my engine has failed, due to coolant intrusion, according to Ken Garff Ford Dealership in St. George, UT. I started having issues with rough start and timing miss and engine light came on. I immediately took it to Dealership and they did two repairs (tune-up) and subsequent gasket change because they said oil was getting into my spark plugs. It did not resolve the issue, took it straight back and now they're telling me I need a new engine. This comes 2 years after I had to pay $7k for a new transmission at only 60k miles. This is wrong and not OK that I am having to deal with this. I don't have $12k laying around for a new engine on a vehicle that shouldn't be having all these issues!

Upon startup rough idle and check engine light came on. Mechanic confirmed cylinder head thinning causing fluid leak into first cylinder. A mechanical note verifies but Ford won't issue a recall. Apparently Ford has know this for years with Ecoboost engines. I don't want to become a victim of vehicle dying in the middle of traffic. Have seen several complaints from Ford owners with no fixes by Ford.

The contact owns a 2018 Ford Explorer. The contact stated that after the vehicle was idling at a traffic stop, the vehicle failed to accelerate as intended while depressing the accelerator pedal. The check engine warning light illuminated. The contact pulled over to the side of the road and turned off the vehicle. The vehicle was restarted; however, the vehicle stalled after driving several minutes. The vehicle was towed to an independent mechanic who diagnosed the vehicle with engine failure and determined that the engine needed to be replaced. The vehicle was not repaired due to the cost. The vehicle remained with the independent mechanic unrepaired. The manufacturer was not made aware of the failure. The approximate failure mileage was 162,000.

Leaking water pump that if isn’t repaired will cause catastrophic engine failure. Very expensive repair, $2800 because of internal placement of the pump. Since the water pump is in line with the crankshaft and located over the main body of the engine, it allows coolant to leak from the water pump into the oil pan. Mixed coolant and oil will lead to engine failure.

In November 2023, our SUV started to over heat and engine shut off. We noticed the coolant reservoir was bone dry. We added coolant. It was bone dry again within a couple days. We had a mechanic friend diagnose and he told us it is the water pump. We took it to the Ford dealership and we were quoted $3000 to repair it. We could not afford this, so thankfully we met a mechanic that works at dealerships but also repairs on the side. He fixed it for $1000. Flash forward to November 2025 and we notice the heat in our car is not working. Couple weeks later, overheat warning and I'm forced to pull over with my 3 children in the car on a busy highway. Once car cooled down, we went straight home and forfeited our plans. Notice the reservoir is empty again. Refill it. It's empty within a few days. Come to find out, it's the water pump again and Ford dealership wants $4400 this time to fix it and our friend who fixed it last time wants $2000 to fix it. He had another Ford Explorer currently in his shop with the same problem. He said it will continue to fail. We are at a loss. Car overheats almost immediately and loses coolant almost immediately. Ford should HAVE A RECALL ON THE WATER PUMP. Why does the engine have to be pulled out to replace the water pump that is just going to fail every 2 years. I have bought Ford since 2008 and swore I always would buy Ford. I have had 3 Ford vehicles. This experience with this vehicle and the Ford dealerships has changed my opinion. I will never buy Ford again. We are only at 125,000 miles and bought vehicle BRAND NEW in 2018-- so 7 years... just 7 years!

Another timing chain failure on highway with engine stopping on road. This should be a recall!!!!! Only 101,300 miles on engine. No warnings no check engine lights until after failure.

I was driving on a freeway when the engine stopped without warning. The timing chain apparently; slipped and the pistons collided with the alves leaving me stranded on the road. This si a dangerous situation that Ford knows of adn is ignoring. THe car had 101000 miles on it. The car was serviced at 98500 miles by Ford but the timing issue was ignored by the mechanics becasue the computer produced no error codes. The obvious ticking of the engine was the only indication that there was a problem that the mechanics ignored. This is a know premature failure and danger to drivers and the engine should be recalled for repair at Ford's expense. Please issue a safety recall on this engine. ( 3.5L V-Shaped 3.5L Ti-VCT) Consumers are at risk for unexpected breakdowns without warning, at speed, in traffic...

The internal water pump system on the EcoBoost engine in the 2018 Ford Explorer failed after 7 years and only 63,880 miles. The vehicle was taken into the shop multiple times when the check engine light came on and the defect was not located until the vehicle failed. Due to the design, it is not easily fixed and cost an outrageous amount of money to fix for a vehicle with less than 100,000 miles. This is a safety risk because if this is a common issue, which it is, and the engine fails while driving it, the driver is not able to get to a safe area to address damages and is left stranded. There are numerous complaints regarding the design flaw of having the water pump inside the engine. The manufacturer refuses to address the flaw. The check engine light came on and was taken in and wrongly diagnosed each time until the engine failed.

The contact owns a 2018 Ford Explorer. The contact stated that while driving at an undisclosed speed, the check engine warning light illuminated. Prior to the failure, when the vehicle was started, there was an abnormal sound coming from the engine. After several minutes, the sound ceased. The vehicle was taken to an independent mechanic who diagnosed the vehicle with a misfire in cylinder #3. The contact was informed that the spark plug was stuck, and the independent mechanic was unable to remove the spark plug. The contact stated that while driving at an undisclosed speed, the check engine warning light illuminated. The vehicle was taken back to the independent mechanic. The vehicle was diagnosed with a misfire in cylinder #3, and the spark plug and ignition coil were replaced. The contact was unsure if the stuck spark plug was removed the second time the vehicle was repaired. Most recently, the contact noticed that while the vehicle was in park(P) and left running, the vehicle was idling roughly. The message "Engine Coolant Over Temperature" was intermittently displayed. The contact pulled over to the side of the road, left the vehicle running, exited the vehicle, opened the hood, and there was no smoke or steam present. The contact returned to the vehicle and noticed that the temperature gauge was indicating that the engine was HOT. The contact drove back to the residence. The vehicle was taken to the dealer, where it was diagnosed with coolant intrusion in cylinders #1, #2, and #4. The contact was informed that the coolant reservoir was empty, that the spark plug in cylinder #3 was stuck, and that the engine needed to be replaced. The vehicle was not repaired. The contact took the vehicle to an independent mechanic for a second opinion, who diagnosed coolant intrusion in cylinders #1, #2, and #4, and that the spark plug was stuck in cylinder #3. The vehicle was not repaired due to the cost. The dealer notified the manufacturer of the failure. The failure mileage was approximately 118,000.

On Thursday, June 14, 2025, the check engine light illuminated on my 2018 Ford Explorer, which has fewer than 75,000 miles. I promptly contacted my trusted local mechanic, Bananno Automotive, to schedule an oil change and requested that they also inspect and diagnose the cause of the warning light. During their inspection, they performed a diagnostic scan and identified stored engine code P0430 – Catalyst System Efficiency Below Threshold (Bank 2), which corresponds to the catalytic converter on the left side of the radiator. Concerned that delaying the repair could lead to increased emissions and potential damage to the engine, I authorized the necessary repairs. All work was completed by June 23, 2025. It was only after the repairs were finalized that I reviewed the Ford Warranty Guide and discovered that this issue is, in fact, covered under warranty. Unfortunately, Ford has denied reimbursement solely because the repairs were not performed at a Ford dealership. This is deeply disappointing, especially considering the repair cost exceeded $1,800, and no alternative solution or support has been offered. My intention in sharing this is to ensure that other Ford owners are not similarly affected by this type of parts failure and warranty denial.

I am writing to formally report a significant mechanical issue involving the water pump in my 2018 Ford Explorer with the 3.5L V6 engine. This vehicle recently experienced a sudden failure of the internal water pump, a problem I have since learned is common across this model and others using the same engine design. In my case, the water pump failure occurred just outside of the vehicle’s extended warranty coverage, leading to engine overheating and a substantial repair cost. What makes this issue particularly concerning is the design flaw in which the water pump is located internally, driven by the timing chain. When the pump fails, it can leak coolant internally, potentially leading to catastrophic engine failure without warning. This design not only makes the part extremely costly to repair (often $2,000–$4,000 or more), but it also introduces a serious safety risk—drivers may experience engine overheating or seizure while on the road, with minimal to no warning. This poses a clear hazard, especially at highway speeds or in high-traffic situations. I understand that many other Ford owners have reported similar failures, yet no recall or Customer Satisfaction Program (CSP) has been issued to address the problem. Given the frequency of these incidents and the potential danger involved, I respectfully request that NHTSA investigate whether this condition qualifies as a safety-related defect. I have included my vehicle details below for your reference: Make/Model/Year: 2018 Ford Explorer Engine: 3.5L V6 (non-EcoBoost) Mileage at Failure: 101345 Failure Description: Internal water pump failure leading to coolant leak and overheating Repair Estimate: $4511.19

Engine light turning off and on. Engine overheating light on. Told by Ford dealership that I need engine replacement.

I believe I am getting the Cam Phaser Rattle sound in my 2018 Ford Explorer Platinum with the 3.5L EcoBoost Engine. Through research I have seen that this is a common problem among other 3.5L EcoBoost Engines like the F-150, Expedition, and Navigator. This happens at Cold Start ups I noticed. I have tried calling my dealership and Ford Corporate about this issue and they say that they can't cover this at all. My vehicle is at 65k miles (just outside the warranty).

The water pump failed. It is internal in the engine. Not sure yet if coolant got into the motor. It is not safe to drive the vehicle and have to get it towed for this expensive repair. Water pumps should not fail at the rate they do on the ford 3.5 motors. They need to have a recall on them.

The contact owns a 2018 Ford Explorer. The contact stated while driving at an undisclosed speed, the check engine warning light illuminated. The vehicle was taken to an independent mechanic who diagnosed the vehicle and retrieved DTC: P0303 (Misfire in cylinder #3). The vehicle was not repaired. The contact took the vehicle to the dealer, who confirmed the failure. The dealer replaced the spark plugs and ignition coils. The contact stated that the failure persisted. The contact stated that on a separate occasion, after the contact had the tires serviced, and the engine overheated. The vehicle was taken back to the dealer and was diagnosed with coolant intrusion into the cylinders, causing engine failure. The contact was informed that the torque converter and engine needed to be replaced; however, the vehicle was not repaired for the most recent failure due to the cost. The contact stated that the failure persisted. The manufacturer was not made aware of the failure. The approximate failure mileage was 119,000.

The contact owns a 2018 Ford Explorer. The contact stated while driving at an undisclosed speed, the engine overheated, with the warning light illuminated. The contact parked the vehicle and refilled the coolant reservoir. In addition, the contact stated that the coolant reservoir was repeatedly refilled weekly. The vehicle was taken to an independent mechanic where it was diagnosed with a coolant pump failure and a slow coolant leak. The contact was informed that the coolant pump needed to be replaced. The vehicle was not repaired. The vehicle was then taken to the dealer where it was diagnosed with coolant pump failure. The contact was informed that the coolant pump needed to be replaced. The vehicle was not yet repaired. The manufacturer was not made aware of the failure. The failure mileage was unknown.

The contact owns a 2018 Ford Explorer. The contact stated that while driving at various speeds on several occasions, there was an abnormal odor outside of the vehicle. The vehicle was taken to an independent mechanic where it was diagnosed and determined that the water pump needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was 131,504.

The contact owns a 2018 Ford Explorer. The contact stated that upon his mother attempting to start the vehicle, the vehicle failed to start. No warning lights were illuminated. The vehicle was towed to an independent mechanic, who diagnosed a failure with the high-speed cooling fan motor relay. The vehicle was not repaired. After investigating the failure, the contact related the failure to Customer Satisfaction Program: 21N01. The manufacturer was notified of the failure, a case was opened, and the contact was referred to the NHTSA Hotline for assistance. The failure mileage was 90,000.

My 2018 Ford Explorer rolled backwards down a hill while in park and engine off.