2018 Ford Explorer Reliability – What Every Owner And Buyer Must Know
The 2018 Ford Explorer remains a popular choice for families and adventurers, but its long-term dependability depends heavily on how you manage specific mechanical vulnerabilities. While the platform is robust, addressing “hidden” issues like the internal water pump and PTU fluid is essential for reaching the 200,000-mile mark.
Deciding to buy a used SUV requires more than just looking at the paint and the interior features. You need to know if the engine and drivetrain can withstand the rigors of your daily commute or a weekend camping trip. Many owners find themselves surprised by costly repairs that could have been prevented with the right knowledge.
In this guide, we will explore the 2018 ford explorer reliability by looking at the specific failure points of the EcoBoost and Ti-VCT engines. We will provide actionable advice for DIY mechanics and car owners who want to stay ahead of the curve. You will learn which components to watch and which maintenance steps are non-negotiable.
Whether you are currently an owner or are browsing the used car market, this deep dive provides the technical clarity you need. We will cover everything from the Power Transfer Unit to the nuances of the SYNC 3 infotainment system. Let’s get under the hood and see what makes this vehicle tick.
Understanding 2018 ford explorer reliability Across Engine Options
The 2018 model year offered three distinct engine choices, and each has its own personality and set of potential headaches. The base 3.5L V6 Ti-VCT is a workhorse, but it hides a significant design flaw that every owner should monitor. This engine is naturally aspirated, meaning it lacks a turbocharger, which simplifies some aspects of maintenance.
The 2.3L EcoBoost four-cylinder is a popular choice for those seeking better fuel economy. It provides surprising torque for its size, making it capable of merging into highway traffic with ease. However, as a direct-injection engine, it is prone to carbon buildup on the intake valves over time.
Finally, the 3.5L EcoBoost V6 found in the Sport and Platinum trims offers exhilarating performance. This engine turns the Explorer into a high-speed cruiser, but the added complexity of twin turbochargers means more heat and more parts that can eventually fail. Each of these engines impacts the overall 2018 ford explorer reliability differently.
The 3.5L Ti-VCT Cyclone V6
This engine is generally praised for its smooth power delivery and longevity. It uses a timing chain rather than a belt, which reduces the need for frequent major service. However, the internal water pump is its most famous “Achilles heel” that can lead to total engine failure if ignored.
Because the pump is driven by the timing chain inside the engine, a leak can dump coolant directly into the oil pan. If you see “chocolate milk” on your oil dipstick, stop driving immediately. This is a critical safety and mechanical warning for this specific engine family.
The 2.3L EcoBoost I4
The 2.3L engine is a lighter option that improves the vehicle’s handling balance. It is generally reliable, but it requires high-quality synthetic oil to keep the turbocharger bearings lubricated. Neglecting oil changes on this engine is a recipe for expensive turbo failure.
Owners should also be aware of low-speed pre-ignition (LSPI), which can damage pistons. Using the correct octane fuel and high-quality spark plugs is the best way to prevent this. Always check the gap on your spark plugs before installing them to ensure optimal combustion.
The 3.5L Twin-Turbo EcoBoost
This is the powerhouse of the lineup, but it generates significant under-hood heat. This heat can accelerate the degradation of plastic vacuum lines and rubber hoses. Regularly inspect the boost hoses for cracks or soft spots that could lead to a loss of power.
While this engine is thrilling to drive, it demands the most rigorous maintenance schedule. Owners who tow heavy trailers should shorten their oil change intervals. Keeping the cooling system in top shape is vital for protecting those expensive twin turbos.
The Internal Water Pump: A Critical Reliability Concern
When discussing the 2018 ford explorer reliability, the internal water pump on the 3.5L engines is the most debated topic. Unlike most vehicles where the water pump is bolted to the outside of the engine, Ford placed this one behind the timing cover. This design choice makes a simple pump replacement a multi-thousand-dollar labor job.
The danger is not just the cost of the repair, but the potential for engine destruction. The pump has a weep hole designed to vent leaking coolant outside the engine, but this hole often gets plugged with road grime. When the seal fails and the weep hole is blocked, coolant enters the crankcase.
To stay safe, perform a cooling system pressure test every year. Watch your coolant reservoir levels closely; if the level drops but you see no puddles on the ground, the pump might be leaking internally. This proactive step can save you from needing a completely new engine.
If you are a DIYer, replacing this pump is a massive undertaking that involves removing the timing chain. It requires specialized camshaft alignment tools and a lot of patience. Most owners should consider this a job for a professional technician who specializes in Ford engines.
The AWD Achilles Heel: Power Transfer Unit (PTU) Issues
If your 2018 Explorer is equipped with Intelligent 4WD, you have a Power Transfer Unit (PTU). This component sends power to the rear wheels, and it is notorious for overheating. Ford originally marketed the PTU fluid as “filled for life,” but real-world experience has proven otherwise.
The PTU sits very close to the hot exhaust manifold, which causes the small amount of gear oil inside to cook and turn into a thick sludge. Once the oil breaks down, the internal gears and bearings begin to wear rapidly. This often leads to a distinct “burnt gear oil” smell inside the cabin.
To improve your 2018 ford explorer reliability, you should change the PTU fluid every 30,000 miles. This is especially important if you live in a hot climate or use your vehicle for towing. Some models lack a drain plug, requiring you to suck the old fluid out through the fill hole using a vacuum pump.
Using a high-quality 75W-140 synthetic gear oil can help the PTU withstand the extreme heat. If you hear a high-pitched whine or a grinding noise from the front-middle of the car, the PTU may already be failing. Addressing this early can prevent a total lock-up of the drivetrain.
Suspension and Steering: Common Rattles and Recalls
The 2018 Explorer is a heavy vehicle, and that weight takes a toll on its suspension components. Owners often report “clunking” noises when driving over bumps or turning the steering wheel. These sounds usually point to worn strut mounts or stabilizer bar links.
One specific area of concern is the rear toe links. Ford has issued several recalls for these parts because they can fracture, leading to a sudden loss of steering control. Check your VIN on the NHTSA website to ensure your vehicle has the updated, reinforced toe links installed.
The electric power-assisted steering (EPAS) is another component to monitor. While generally reliable, a failure in the EPAS rack can make the vehicle very difficult to steer. If you notice the steering becoming “notchy” or if the warning light illuminates, have the system scanned for codes immediately.
For those who enjoy light off-roading, the suspension bushings are the first things to wear out. Dust and grit can penetrate the rubber, causing it to crack and squeak. Applying a silicone-based lubricant to the bushings during your oil changes can help extend their lifespan.
Electronics and Interior: SYNC 3 and Dashboard Gremlins
The 2018 model year features the SYNC 3 infotainment system, which is a significant upgrade over previous versions. It is generally stable and supports Apple CarPlay and Android Auto. However, it is not entirely immune to glitches or hardware failures.
A common issue is the GPS becoming inaccurate or the screen becoming unresponsive. Often, a “master reset” in the settings menu or a software update via Wi-Fi can fix these bugs. If the screen stays black, the Accessory Protocol Interface Module (APIM) might need replacement.
Inside the cabin, some owners have noted issues with the climate control blend doors. If you hear a clicking sound behind the dash when you change the temperature, a blend door actuator is likely failing. Replacing these can be tedious, as they are often buried deep within the dashboard assembly.
Another interior quirk involves the “A-pillar” trim on the outside of the windshield. The clips holding this plastic trim can break, causing the piece to fly off at highway speeds. Inspect these pillars for any wobbling or gaps and secure them with new clips if they feel loose.
Maximizing 2018 ford explorer reliability with Proactive Maintenance
The secret to a dependable Explorer is ignoring the “normal” maintenance intervals in the owner’s manual and following a “severe service” schedule. Because of the heat issues mentioned earlier, fluid longevity is much shorter than Ford suggests. Regular fluid analysis can be a great tool for the dedicated DIYer.
Change your engine oil every 5,000 miles using a high-quality synthetic oil and a premium filter. This is the single best thing you can do to protect the timing chain and the turbochargers. Clean oil keeps the small oil passages clear, preventing “sludge” that starves critical components.
Flush the cooling system every three years or 50,000 miles. Fresh coolant contains corrosion inhibitors that protect the internal water pump seals. If the coolant becomes acidic, it will eat away at the seals, leading to the dreaded internal leak we discussed earlier.
- Transmission Service: Drain and fill the 6F55 or 6F35 transmission fluid every 45,000 miles to keep shifts crisp.
- Brake Maintenance: Inspect the slide pins and lubricate them annually to prevent uneven pad wear.
- Battery Health: Modern Explorers are heavy on electronics; replace your battery every 3-4 years to avoid weird sensor errors.
- Tire Rotations: Rotate tires every 5,000 miles to protect the AWD system from strain caused by uneven tire diameters.
Following these steps will drastically improve your 2018 ford explorer reliability and give you peace of mind on long trips. A well-maintained Explorer is a formidable machine that can handle snow, mud, and highway miles with ease. Don’t wait for a warning light to appear before you take action.
Frequently Asked Questions About 2018 ford explorer reliability
Is the 2018 Ford Explorer a good used car to buy?
Yes, the 2018 Explorer is a strong contender in the mid-size SUV market, provided it has a documented service history. Buyers should prioritize vehicles that have had regular oil changes and PTU fluid services. Always have a pre-purchase inspection performed by a mechanic who knows the Ford Cyclone engine platform.
How long does a 2018 Ford Explorer engine last?
With meticulous maintenance, these engines can easily last between 150,000 and 200,000 miles. The key is preventing the internal water pump failure on the V6 models and managing carbon buildup on the EcoBoost versions. Consistent coolant flushes are the best insurance policy for engine longevity.
Does the 2018 Ford Explorer have transmission problems?
The 6-speed automatic transmission is generally reliable but can experience “shuddering” if the fluid is neglected. Regular fluid exchanges (not high-pressure flushes) help maintain smooth shifting. If you experience hard shifts, a software update for the Transmission Control Module (TCM) may be required.
What are the most common 2018 Ford Explorer recalls?
The most significant recalls involve the rear suspension toe links and the front brake hoses. There were also recalls for the roof rack covers and engine block heaters in certain climates. Always check your specific vehicle’s VIN to ensure all safety recalls have been completed by a certified dealer.
Which engine is the most reliable in the 2018 Explorer?
The 3.5L Ti-VCT V6 is often considered the most reliable in terms of simplicity, but its internal water pump is a major caveat. The 2.3L EcoBoost is also very dependable if the oil quality is strictly maintained. Choosing the right engine depends on whether you prioritize fuel economy, towing power, or ease of maintenance.
Final Thoughts on Keeping Your Explorer on the Road
The 2018 ford explorer reliability is a story of two halves: a robust chassis and a capable drivetrain that require specific, proactive care to avoid major pitfalls. By understanding the risks associated with the internal water pump and the PTU, you can navigate ownership with confidence. Knowledge is your best tool when it comes to automotive longevity.
Remember to listen to your vehicle; new noises, smells, or vibrations are usually early warnings of a developing issue. Address small leaks and rattles immediately before they turn into catastrophic failures. A little bit of time spent under the hood today can save you thousands of dollars and hours of frustration tomorrow.
Whether you are tackling a trail or hauling the family to a soccer game, your Explorer is built for the task. Keep up with your fluid changes, stay on top of recalls, and don’t be afraid to get your hands dirty with some DIY maintenance. Stay safe, stay informed, and enjoy the drive!
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