2015 Ford Explorer Xlt AWD – Reliability, Maintenance, And Common
The 2015 Ford Explorer XLT AWD is a versatile mid-size SUV known for its comfortable three-row seating and capable Terrain Management System. To keep this vehicle performing at its peak, owners must focus on proactive PTU fluid changes and monitoring the internal water pump to avoid catastrophic engine failure.
Owning a 2015 ford explorer xlt awd means you have a vehicle capable of hauling the family to soccer practice or navigating snowy mountain passes with ease. However, like any high-mileage SUV, keeping it on the road requires more than just occasional oil changes.
I have spent years under the hoods of these Gen-5 Explorers, and I can promise you that a little bit of specialized knowledge goes a long way. This guide will preview the critical maintenance steps you need to take to prevent the most common “Explorer headaches.”
We will dive deep into the Intelligent 4WD system, the nuances of the 3.5L Ti-VCT engine, and the specific suspension components that often wear out prematurely. By the end of this article, you will have a clear roadmap for maintaining your vehicle like a professional technician.
Understanding the Foundation of the 2015 ford explorer xlt awd
The 2015 ford explorer xlt awd is built on the Ford D4 platform, which it shares with the Flex and the Taurus. This unibody construction provides a car-like ride, but it also introduces specific mechanical layouts that DIYers need to understand before picking up a wrench.
Most XLT models from this year feature the naturally aspirated 3.5L V6 engine. This engine is generally robust, but its transverse mounting creates a tight engine bay that makes certain repairs, such as the water pump replacement, significantly more complex than on a longitudinal truck engine.
The All-Wheel Drive (AWD) system in this vehicle is “intelligent,” meaning it uses a Power Transfer Unit (PTU) to send torque to the rear wheels only when needed. Understanding how this PTU functions is the single most important factor in ensuring your drivetrain lasts past the 100,000-mile mark.
The Role of the Terrain Management System
One of the standout features of the 2015 ford explorer xlt awd is the rotary dial located on the center console. This allows you to choose between Normal, Mud/Ruts, Sand, and Grass/Gravel/Snow modes.
Each setting changes how the engine throttle, transmission shifting, and traction control systems behave. For example, Sand mode keeps the transmission in lower gears longer to maintain momentum, while Snow mode dulls throttle response to prevent wheel spin.
Engine Specs and Fluid Requirements
The 3.5L V6 requires 6 quarts of 5W-20 synthetic blend or full synthetic oil. I always recommend full synthetic oil for this specific engine because it helps protect the internal timing chain and the water pump bearings, which are lubricated by the engine oil.
Using a high-quality FL-500S oil filter is also a best practice. These filters have a silicone anti-drainback valve that prevents dry starts, which can lead to premature wear on the cam phasers over time.
Maintaining Your 2015 ford explorer xlt awd
Regular maintenance is the difference between a vehicle that hits 200,000 miles and one that ends up in the scrap yard early. For the 2015 ford explorer xlt awd, the factory maintenance schedule is often considered “too optimistic” by experienced mechanics.
Ford suggests long intervals for many fluids, but real-world driving conditions—like towing, idling in traffic, or off-roading—dictate a more aggressive approach. You should consider “severe service” intervals if you want to maximize reliability.
In this section, we will break down the specific fluids and components that require your attention. Pay close attention to the drivetrain fluids, as these are the most frequently neglected areas of this specific model.
The Critical PTU Fluid Change
The Power Transfer Unit (PTU) is the gearbox that sends power to the rear wheels. Ford famously labeled this fluid as “lifetime,” but in reality, the fluid often turns into a thick sludge due to the high heat generated by the nearby exhaust system.
Since most 2015 models do not have a drain plug, you must use a fluid extraction pump to suck the old 75W-140 gear lube out through the fill hole. Doing this every 30,000 miles can save you from a $2,000 replacement bill.
Transmission Service Intervals
The 6F55 6-speed automatic transmission is generally reliable, but it benefits greatly from a “drain and fill” every 45,000 miles. Do not perform a high-pressure flush, as this can dislodge debris and clog the internal transmission filter.
A simple drain and fill replaces about 5 to 6 quarts of Mercon LV fluid. Always check the fluid level while the engine is running and the transmission is at operating temperature to ensure an accurate reading.
Coolant System and the Water Pump Risk
The water pump on the 3.5L V6 is driven by the timing chain and is located inside the engine front cover. If the pump seal fails, it can leak coolant directly into the oil pan, which will destroy the engine bearings in minutes.
To prevent this, change your Orange Coolant (or the newer Yellow P-OAT replacement) every 5 years or 60,000 miles. Fresh coolant maintains the proper pH balance and prevents the pump seals from becoming brittle and leaking.
Common Repairs and Troubleshooting
Even with perfect maintenance, the 2015 ford explorer xlt awd has a few “known issues” that owners should be prepared to handle. Being able to spot these problems early can save you from being stranded on the side of the road.
Most of these issues manifest as specific sounds or vibrations. As a DIYer, your ears and a basic OBD-II scanner are your best diagnostic tools for identifying these faults before they escalate into major repairs.
Let’s look at the three most common areas where this model tends to show its age: the suspension, the fuel system, and the electronic throttle body.
Rear Toe Link Failure
A very common issue with the 2015 ford explorer xlt awd involves the rear suspension toe links. These can snap or wear out, leading to a “loose” feeling in the rear end or even a total loss of steering control.
There have been several recalls regarding this part. If you hear a clunking sound from the rear when going over bumps, inspect the toe links immediately or take the vehicle to a dealership to check for open recalls.
Electronic Throttle Body (ETB) Issues
If your Explorer suddenly loses power and enters “Limp Mode” with a wrench icon on the dash, the Electronic Throttle Body is likely the culprit. This is a common failure point where the internal motor or sensor fails.
Replacing the ETB is a relatively simple DIY task. It is located right at the front of the intake manifold and can be swapped out with basic hand tools in about 30 minutes. Always perform a throttle relearn procedure after replacement.
Wheel Bearing and Hub Assembly
Because the 2015 ford explorer xlt awd is a heavy vehicle, it puts significant stress on the wheel bearings. A humming or growling sound that changes pitch when you turn the steering wheel usually indicates a failing hub assembly.
I recommend replacing these in pairs (both fronts or both rears) to ensure consistent handling. Use a torque wrench to tighten the large axle nut to the factory spec of 221 lb-ft to prevent premature bearing failure.
Off-Road Setup and Performance Mods
While it is not a dedicated rock crawler like a Jeep Wrangler, the 2015 ford explorer xlt awd is surprisingly capable on fire roads and beach sand. With a few smart upgrades, you can significantly improve its off-road prowess.
The key to off-roading an Explorer is managing ground clearance and traction. Since it uses a fully independent suspension, you won’t get massive wheel travel, but you can improve the “approach and departure” angles with the right gear.
Always remember that off-roading puts extra strain on your AWD components. If you plan on hitting the trails frequently, you must stay on top of your PTU and differential fluid changes more than the average driver.
Choosing the Right All-Terrain Tires
The single best upgrade for your 2015 ford explorer xlt awd is a set of high-quality All-Terrain (A/T) tires. Look for a tire with a Three-Peak Mountain Snowflake (3PMSF) rating for the best performance in snow and mud.
Size 245/60R18 is the standard XLT size, but many owners successfully step up to a slightly larger 265/60R18 for a wider footprint and better look. Just be aware that larger tires may cause slight speedometer inaccuracies.
Suspension Lift Kits
If you need more ground clearance, a 1.5-inch or 2-inch leveling kit can help. These usually consist of spacers that sit on top of the factory struts. They provide just enough lift to clear larger tires and prevent the front air dam from scraping on obstacles.
Keep in mind that lifting an Explorer can increase the wear on your CV axles. If you install a lift, keep a close eye on the rubber CV boots for tears or grease leakage, as the increased angles put more stress on the joints.
Lighting and Recovery Gear
For night-time trail riding, the factory halogen headlights on the XLT can feel a bit dim. Upgrading to LED bulbs or adding a discrete light bar behind the grille can illuminate the path ahead without looking too “flashy.”
Always carry a basic recovery kit, including a kinetic snatch strap and a pair of soft shackles. The Explorer has a front recovery point hidden behind a plastic cover on the bumper—make sure you know how to access it before you get stuck.
Essential Tool Kit for the DIY Mechanic
To work on your 2015 ford explorer xlt awd effectively, you need a specific set of tools. Ford uses a mix of metric and standard fasteners, but you will primarily be using metric sockets and wrenches.
Working on modern SUVs also requires a bit of “reach.” A good set of socket extensions and swivel joints will make accessing hidden bolts, like those on the PTU or the rear spark plugs, much easier for the home mechanic.
Here is a list of the must-have items for your garage if you plan on maintaining this specific Ford model yourself.
- 3/8-inch and 1/2-inch Drive Ratchets: Essential for everything from oil changes to suspension work.
- Metric Socket Set (8mm to 32mm): The 32mm is specifically for the large axle nuts.
- Fluid Extraction Pump: Absolutely necessary for servicing the PTU fluid.
- Torque Wrench: Critical for lug nuts (100 lb-ft) and suspension components to ensure safety.
- OBD-II Scan Tool: A tool that can read Ford-specific PIDs is helpful for monitoring transmission and PTU temperatures.
- Jack and High-Capacity Jack Stands: Never work under a vehicle supported only by a floor jack.
Safety First: When to Call a Professional
While DIYing is rewarding, some jobs on the 2015 ford explorer xlt awd are best left to a licensed professional. Knowing your limits is a key part of being a successful mechanic and staying safe.
If you suspect a water pump failure (milky oil or sweet-smelling exhaust), do not attempt to drive the vehicle. This is a 10-12 hour labor job that requires timing the engine perfectly. If you are off by one tooth, you can destroy the valves.
Similarly, if you experience issues with the AdvanceTrac system or the ABS module, these often require specialized Ford programming software (IDS or FORScan) to calibrate. A professional shop will have the tools to ensure these safety systems are functioning correctly.
Frequently Asked Questions About 2015 ford explorer xlt awd
What is the towing capacity of the 2015 ford explorer xlt awd?
When equipped with the Class III Tow Package, the 2015 Explorer XLT AWD can tow up to 5,000 pounds. Without the factory tow package, the limit is significantly lower, usually around 2,000 pounds, due to the lack of an auxiliary transmission cooler.
Does the 2015 Ford Explorer XLT have a timing belt or chain?
The 3.5L V6 engine in the 2015 Explorer uses a timing chain. Unlike a belt, the chain is designed to last the life of the engine, provided you perform regular oil changes to keep the tensioners and guides lubricated.
How do I know if my PTU is failing?
Common signs of PTU failure include a burnt oil smell (like propane) after driving, a leaking seal near the passenger side axle, or a high-pitched whining noise that increases with vehicle speed. If you see “sludge” leaking from the vent, the unit is likely overheated.
What type of gas should I use in my Explorer XLT?
The 3.5L Ti-VCT V6 is designed to run on 87-octane regular unleaded gasoline. You do not need premium fuel unless you are towing heavy loads in very hot weather, where it may help prevent minor engine knock.
Is the 2015 Ford Explorer XLT AWD good in the snow?
Yes, it is excellent. The Intelligent AWD system reacts to wheel slip in milliseconds. When set to “Grass/Gravel/Snow” mode, the system optimizes torque distribution to prevent sliding, making it a very confident winter driver.
Final Thoughts on the 2015 ford explorer xlt awd
The 2015 ford explorer xlt awd remains a top-tier choice for those who need space, comfort, and capability without the bulk of a full-size truck. By focusing on the “big three” maintenance items—PTU fluid, transmission fluid, and coolant—you can avoid the most expensive repairs associated with this model.
Whether you are prepping for a cross-country road trip or just want a reliable daily driver, taking a proactive approach to maintenance will pay off in the long run. Use the right tools, follow the torque specs, and don’t be afraid to get your hands dirty.
Stay safe on the road, keep an eye on those fluid levels, and enjoy the adventure that your Explorer provides!
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