VCT System / Camshaft Timing Faults
high- Typically appears
- 60–120k mi
- Estimated repair
- $400 – $1,200
2018 Ford
ExplorerSUV
2.3L I4 EcoBoost Turbocharged · SUV
The 2018 Ford Explorer is a three-row, mid-size SUV that has been a best-seller in its class for years. Built on a unibody platform, it seats up to seven and targets families who want SUV versatility without full-size truck bulk. The 2018 model year sits in the fifth generation (2011–2019) and received Ford's updated SYNC 3 infotainment system and a refreshed interior versus earlier years. Power comes standard from a 2.3L turbocharged EcoBoost four-cylinder, with an optional 3.5L V6 EcoBoost on Sport and Platinum trims. Both engines pair with a six-speed automatic. All-wheel drive is widely available and popular in Wisconsin, where winter traction matters. Towing capacity reaches up to 5,000 lbs with the base engine and up to 5,600 lbs with the 3.5L. The Explorer's strengths are interior space, a comfortable ride, and a wide range of available safety tech. Its weaknesses are well-documented: the 2.3L EcoBoost has a history of oil dilution and VCT system trouble, and the 6F55 six-speed transmission has been a recurring pain point across this generation. Go in with realistic expectations and it's a capable family hauler; skip the pre-purchase inspection and it can become expensive.
Reliability
3/5
Verified data
Specs shown for Explorer AWD FFV — the most common configuration.
Other trims may vary in engine, drivetrain, or fuel economy. Sign in to see your vehicle's exact specs.
Engine
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Drivetrain
AWD
Fuel
Gasoline
MPG
20 city / 27 hwy / 23 combined
Seats
7
Doors
4
Body
SUV
MSRP
$33,860
Overview
AI-curatedThe 2018 Ford Explorer is a three-row, mid-size SUV that has been a best-seller in its class for years. Built on a unibody platform, it seats up to seven and targets families who want SUV versatility without full-size truck bulk. The 2018 model year sits in the fifth generation (2011–2019) and received Ford's updated SYNC 3 infotainment system and a refreshed interior versus earlier years. Power comes standard from a 2.3L turbocharged EcoBoost four-cylinder, with an optional 3.5L V6 EcoBoost on Sport and Platinum trims. Both engines pair with a six-speed automatic. All-wheel drive is widely available and popular in Wisconsin, where winter traction matters. Towing capacity reaches up to 5,000 lbs with the base engine and up to 5,600 lbs with the 3.5L. The Explorer's strengths are interior space, a comfortable ride, and a wide range of available safety tech. Its weaknesses are well-documented: the 2.3L EcoBoost has a history of oil dilution and VCT system trouble, and the 6F55 six-speed transmission has been a recurring pain point across this generation. Go in with realistic expectations and it's a capable family hauler; skip the pre-purchase inspection and it can become expensive.
Known for
- Practical three-row seating for families
- Wide availability of Ford Co-Pilot360 safety features on higher trims
- Strong towing capability for a unibody mid-size SUV
- 2.3L EcoBoost fuel economy advantage over V6 competitors
- Comfortable highway ride quality
Best for
- Families needing a third row on a mid-size budget
- Light towing (boats, small trailers) in the 4,000–5,500 lb range
- Daily commuters wanting AWD capability in Wisconsin winters
- Buyers who prioritize interior technology and connectivity
Watch for
- Oil dilution in the 2.3L EcoBoost (fuel contaminating engine oil — check oil level and smell)
- Variable Camshaft Timing (VCT) system faults — common and can become costly if ignored
- 6F55 six-speed automatic transmission shudder and delayed engagement
- Exhaust fume intrusion into the cabin (a known NHTSA-investigated issue on this generation)
- Third-row headroom is tight for adults
Common issues by mileage
6 known2.3L EcoBoost Oil Dilution
high- Typically appears
- 30–100k mi
- Estimated repair
- $0 – $500
6F55 Transmission Shudder / Delayed Engagement
high- Typically appears
- 50–120k mi
- Estimated repair
- $300 – $3,500
Oxygen Sensor / Heater Circuit Faults
medium- Typically appears
- 80–150k mi
- Estimated repair
- $150 – $400
Exhaust Fume Intrusion into Cabin
medium- Typically appears
- Any mileage
- Estimated repair
- $200 – $1,500
SYNC 3 Infotainment Freezes / Blank Screen
medium- Typically appears
- Any mileage
- Estimated repair
- $0 – $600
Maintenance schedule
- 1 Every 5,000 miles — do NOT stretch to Ford's 10k OLM recommendation on this engine Engine oil & filter change
The 2.3L EcoBoost is prone to oil dilution. Shorter intervals flush contaminated oil before it damages the VCT system and bearings. Use full synthetic 5W-30.
- 2 Every 60,000 miles Transmission fluid exchange
Ford lists the 6F55 fluid as 'lifetime,' but ownership data strongly disagrees. Fresh Mercon LV fluid at 60k is the single best thing you can do to prevent torque converter shudder and extend transmission life.
- 3 Every 60,000 miles Spark plug replacement
Worn plugs increase the combustion misfire that contributes to oil dilution. OEM-spec plugs are preferred — do not install non-OEM heat range plugs in a turbocharged engine.
- 4 Every 20,000–30,000 miles or annually Air filter inspection and replacement
A clogged air filter forces the turbo to work harder, increasing intake temperatures and fuel trim errors. Wisconsin gravel and road dust accelerate fouling.
- 5 Every 4–5 years or 60,000 miles Coolant system inspection and flush
EcoBoost engines run hot under load. Degraded coolant loses corrosion inhibitors, leading to water pump and thermostat failures. Check freeze protection annually before winter — should be rated to at least -34°F.
- 6 Every 2–3 years Brake fluid flush
Moisture absorption in brake fluid lowers its boiling point. In Wisconsin winters, water in the lines can also contribute to ABS modulator corrosion.
- 7 Monthly during winter, full inspection every spring Underbody wash and rust inspection
Lake Geneva road salt is brutal on brake lines, fuel lines, and suspension components. Pay attention to the rear subframe area, which is a known rust accumulation point on this platform.
- 8 Every fall, before temperatures drop below freezing Battery load test
The Explorer's electrical load (AWD, heated seats, SYNC, backup cameras) is high. A marginal battery that seems fine in September will fail at -10°F. Battery life in cold climates averages 4–5 years.
Always defer to the manufacturer's service manual for warranty-mandated intervals.
Cost of ownership
Annual maintenance
$700 – $1,600
Fuel
At 23 MPG combined and typical Wisconsin driving, expect roughly $2,000–$2,600/year at current mid-grade fuel prices, assuming 12,000–15,000 miles annually.
Insurance
Mid-size SUVs in Wisconsin typically run $1,200–$1,800/year for full coverage on a 2018 model, depending on driving record and ZIP code. The Explorer's theft rates and repair costs are average for its class.
A well-maintained 2018 Explorer is a manageable ownership cost — until it isn't. Routine years (oil changes, tires, brakes) average $700–$1,000. Years where VCT work, a transmission service, or a major repair lands can push $2,000–$4,000 out of pocket. Budget for surprises, especially in the 80k–130k mi window where multiple systems tend to surface issues simultaneously.
Seasonal care
Lake Geneva, WI Winter
- Switch to a full synthetic 5W-30 if not already — cold cranking on a thicker oil accelerates VCT wear on the 2.3L EcoBoost.
- Load-test the battery every October. The Explorer's high electrical demand drains a weak battery fast at sub-zero temps.
- Fill the washer fluid reservoir with -25°F or colder rated fluid. The heated wiper park area helps, but frozen fluid lines are still possible.
- Inspect the underbody brake and fuel lines for surface rust before salt season starts — treat exposed metal with a rust inhibitor if needed.
- Check AWD system operation and differential fluid condition. AWD in poor condition won't protect you when you need it most.
- Keep the fuel tank above half during cold snaps to reduce condensation in the fuel system and ensure the fuel pump stays submerged and cool.
Summer
- Check tire pressure monthly — every 10°F of temperature rise adds roughly 1 PSI. Overinflated tires reduce traction and wear the centers fast.
- Inspect the cabin air filter before running A/C hard — a clogged filter cuts airflow and makes the compressor work overtime.
- Monitor coolant temperature gauge, especially under load (hills, towing, full passenger load) on hot days. EcoBoost engines can run warm.
- Check the A/C system for adequate cooling early in the season — recharging refrigerant is far cheaper before a road trip than on the side of the highway.
- Inspect wiper blades — winter salt and UV exposure deteriorate blades quickly. Replace before summer storm season.
Comparable vehicles
2018 Chevrolet
Traverse
More interior volume and better third-row usability, naturally aspirated V6 avoids turbo oil dilution concerns, similar price range.
2018 Honda
Pilot
Class-leading reliability scores, practical three-row layout, AWD available, and a simpler powertrain with fewer known failure modes.
2018 Toyota
Highlander
Strong long-term reliability reputation, proven V6, wide dealer/independent shop support across Wisconsin, and holds resale value well.
2018 Dodge
Durango
RWD/AWD platform with available V8, higher towing capacity, and three rows — appeals to buyers who want more power and aren't concerned about fuel economy.