2018 Ford Explorer Problems – Expert Fixes And Reliability Solutions

The 2018 Ford Explorer is a popular mid-size SUV known for its power and family-friendly features, yet it is not without its mechanical quirks. From internal water pump failures to suspension recalls, staying ahead of these issues is essential for any owner or DIY mechanic looking to maintain vehicle longevity.

Owning a versatile SUV like the Explorer often means balancing daily commutes with weekend adventures. You likely appreciate the smooth ride and spacious cabin, but you also want to avoid being stranded on the side of the road. Understanding the specific 2018 ford explorer problems allows you to perform proactive maintenance and catch small issues before they become expensive repairs.

In this guide, we will dive deep into the most common mechanical and electrical hurdles this model year faces. We will provide actionable steps for troubleshooting and clear indicators for when you can handle the fix yourself or when you need a professional. Let’s get your Explorer back into peak performing shape.

Whether you are a seasoned DIYer or a new owner, this breakdown provides the technical insight you need to navigate ownership with confidence. We have gathered data from technical service bulletins, recall notices, and real-world shop experience to give you the full picture of what to expect.

Transmission Troubles and Shifting Hesitation

The 6-speed automatic transmission in the 2018 Explorer is generally robust, but many owners report harsh shifting or hesitation between gears. This often manifests as a “clunk” when shifting from Park to Reverse or a noticeable “jerk” during low-speed acceleration. These symptoms can be alarming, but they do not always signify a total transmission failure.

First, check your transmission fluid level and condition using the dipstick located near the back of the engine bay. If the fluid appears dark or smells burnt, a fluid exchange is your first line of defense. Use only the manufacturer-specified Mercon V or LV fluid to ensure the solenoids operate within their designed pressure ranges.

If fluid changes do not solve the issue, the problem may lie in the Transmission Control Module (TCM) software. Ford frequently releases updates to the shift logic that can smooth out these transitions. A quick trip to a dealer or a high-end scan tool can help you determine if your vehicle is running the latest calibration.

Torque Converter Shudder

A specific vibration, often described as driving over “rumble strips,” usually points to a torque converter shudder. This typically happens while cruising at speeds between 30 and 50 mph when the converter is attempting to lock up. Adding a friction modifier specifically designed for shudder can sometimes provide a temporary fix, but a persistent shudder usually requires a converter replacement.

Solonoid Failure Symptoms

If your Explorer is “flaring” (the RPMs spike during a gear change), a shift solenoid may be sticking. DIY mechanics can sometimes replace these solenoids by dropping the transmission pan, though it requires a clean environment and patience. Always use a torque wrench when re-installing the pan bolts to prevent leaks.

The Critical 3.5L EcoBoost Internal Water Pump Issue

One of the most discussed 2018 ford explorer problems involves the 3.5L Duratec and EcoBoost engines. Unlike most vehicles where the water pump is driven by an external belt, this engine features an internal water pump driven by the timing chain. If the pump seal fails, coolant can leak directly into the engine oil, leading to catastrophic engine failure.

To monitor this, regularly check your oil dipstick for a “milky” or “chocolate milk” appearance. This indicates that coolant has mixed with the oil, destroying its lubricating properties. You should also look for coolant weeping from a small hole located behind the alternator, which is the engine’s way of signaling a pump failure before it reaches the oil pan.

Replacing this pump is a massive undertaking for a DIYer, as it requires removing the front timing cover and timing chain. If you notice a dropping coolant level with no visible external leaks, stop driving immediately. Continuing to run the engine with contaminated oil will lead to bearing failure, often requiring a full engine replacement costing thousands of dollars.

Preventative Maintenance for the Cooling System

To extend the life of your internal water pump, never skip a coolant flush. Old coolant becomes acidic and can eat away at the pump seals. Use a high-quality 50/50 prediluted coolant to ensure the pH levels remain stable and the seals stay supple.

Timing Chain Tensioners

While you are addressing the water pump, it is wise to inspect the timing chain tensioners and guides. If you hear a rattling sound upon cold starts, your guides may be worn. Replacing these components while the engine is already apart for a water pump is a smart way to save on future labor costs.

Addressing 2018 ford explorer problems with Rear Suspension

Suspension integrity is a major safety concern for the 2018 model year, specifically regarding the rear toe links. Ford has issued multiple recalls for this part because the links can fracture under heavy stress or frequent suspension travel. A broken toe link causes a sudden change in steering handling, which can lead to a loss of control.

If you notice your Explorer “wandering” on the highway or if you hear a loud clicking or snapping sound from the rear when going over bumps, inspect the toe links immediately. These are the bars that connect the rear wheel knuckles to the frame. Look for any visible cracks or excessive play in the bushings.

Because this is a known safety issue, check your VIN on the NHTSA website to see if your vehicle is covered under a safety recall. If so, a dealership will replace the parts for free. For off-roaders who put extra stress on their suspension, upgrading to heavy-duty aftermarket toe links can provide additional peace of mind and durability.

Front Strut Leaks

The front struts on the 2018 Explorer are prone to leaking hydraulic fluid prematurely. Look for a greasy coating on the body of the strut behind the front wheels. If the strut is “wet,” it can no longer dampen bumps effectively, leading to increased tire wear and poor braking performance.

Wheel Bearing Hum

A consistent humming or growling noise that changes pitch with vehicle speed often indicates a failing wheel bearing. To test this, safely jack up the vehicle and shake the wheel at the 12 and 6 o’clock positions. Any movement or “play” means the bearing hub assembly needs to be replaced immediately.

Carbon Buildup in GDI Engines

The 2.3L and 3.5L EcoBoost engines utilize Gasoline Direct Injection (GDI). While this improves power and fuel economy, it means fuel never washes over the intake valves. Over time, carbon deposits bake onto the valves, restricting airflow and causing rough idling or a loss of power.

You can identify this problem if your Explorer feels “sluggish” or if you experience a stumble when accelerating from a stop. For a DIY fix, you can use a specialized intake valve cleaner spray. This involves spraying the cleaner into the intake tract while the engine is running to chemically dissolve the carbon.

For severe cases, a professional walnut blasting service is the most effective solution. This process uses pressurized air and crushed walnut shells to scrub the valves clean without damaging the metal. Keeping your intake clean ensures your turbochargers can breathe properly and maintain peak boost pressure.

The Importance of High-Quality Oil

Using a high-quality full synthetic oil is non-negotiable for GDI engines. Synthetic oils have a higher flash point, meaning they are less likely to vaporize and contribute to the oily mist that creates carbon buildup in the first place. Always use the weight recommended in your owner’s manual.

Installing a Catch Can

Many enthusiasts install an oil catch can in the PCV (Positive Crankcase Ventilation) line. This device traps oil vapors before they can enter the intake manifold. It is a simple, effective mod that significantly reduces the rate of carbon accumulation on your valves.

Electronic Gremlins and SYNC 3 Issues

The 2018 Explorer features the SYNC 3 infotainment system, which is generally better than previous versions but still prone to glitches. Common 2018 ford explorer problems in this category include frozen screens, GPS inaccuracies, and the backup camera failing to display. A black screen when shifting into reverse is a significant safety hazard in a vehicle this size.

Before replacing hardware, try a master reset through the system settings menu. This clears the cache and can often resolve minor software conflicts. You should also ensure your system is connected to Wi-Fi to download the latest “over-the-air” firmware updates from Ford.

If the backup camera remains intermittent, the issue is often a faulty camera module or a pinched wire in the liftgate harness. Since the liftgate opens and closes frequently, the wiring inside the rubber boot can fatigue and break over time. Inspecting this harness is a great task for a DIYer with a basic multimeter.

Smart Liftgate Malfunctions

The power liftgate may sometimes refuse to close or “bounce back” as if it hit an obstruction. This is often caused by a failing liftgate strut or a dirty sensor. Clean the weather stripping around the door and ensure nothing is blocking the latch mechanism before assuming the motor is dead.

Battery Drain Concerns

If your Explorer struggles to start after sitting overnight, you may have a parasitic draw. Common culprits include the “smart” keyless entry system staying active or a faulty alternator diode. Have your battery and charging system tested at a local auto parts store to rule out a simple dead cell.

Exterior Body and Paint Oxidation

A frustrating issue for many owners is the aluminum corrosion occurring on the leading edge of the hood. Because the hood is aluminum, it doesn’t “rust” in the traditional sense, but the paint can bubble and peel due to oxidation. This usually starts as small bubbles near the “EXPLORER” lettering or the front lip.

Once oxidation begins under the paint, it is very difficult to stop. If your vehicle is still under the corrosion warranty, Ford may cover the repair or replacement of the hood. For DIYers, the only permanent fix is to sand the area down to bare metal, apply a specialized zinc-chromate primer, and repaint.

Additionally, check the roof rack tracks for any signs of water leakage. If the seals under the roof rails fail, water can seep into the headliner, causing stains and potentially damaging the side-curtain airbags. Keeping these areas clean of debris like pine needles and leaves helps prevent water from pooling and entering the cabin.

Frequently Asked Questions About 2018 ford explorer problems

Is the 2018 Ford Explorer a reliable car?

Generally, yes. Most owners reach 150,000 miles with only routine maintenance. However, the internal water pump and rear toe links are critical areas that require close monitoring to ensure the vehicle remains safe and dependable.

How do I know if my water pump is failing?

Look for low coolant levels, a milky substance on the oil dipstick, or coolant drips near the alternator. If the engine temperature gauge starts to climb into the red, pull over immediately to prevent total engine destruction.

Was there a recall for the 2018 Ford Explorer?

Yes, there have been several, most notably for the rear suspension toe links and the backup camera. You should always enter your VIN into the Ford owner portal to see which recalls apply to your specific vehicle.

Does the 2018 Explorer have transmission issues?

Some owners experience harsh shifts or shuddering. Most of these issues can be resolved with a software update or a fluid change, though high-mileage units may eventually require a new torque converter.

Why do I smell exhaust fumes inside my Explorer?

This has been a reported issue where exhaust gases enter the cabin through the rear air extractors. Ford has released several technical service bulletins (TSBs) to seal the rear of the vehicle. If you smell fumes, it is a safety risk and should be inspected by a professional immediately.

Final Thoughts for the Savvy Owner

Navigating 2018 ford explorer problems doesn’t have to be a headache if you are proactive. By keeping a close eye on your coolant condition, staying updated on safety recalls, and performing regular transmission services, you can enjoy everything this SUV has to offer without the fear of major breakdowns.

Remember, the best tool in your garage is knowledge. Pay attention to the sights, sounds, and smells of your vehicle. A small vibration today could be a simple bushing replacement, but ignoring it could lead to a much larger repair down the road. Stay safe, keep your tools sharp, and enjoy the drive!