The Ford Explorer is one of the most popular SUVs in Oklahoma — and one of the most frequently repaired. The Explorer has had several distinct generations, each with its own common failure points. At Norm’s Auto Clinic in Coweta, we’ve seen Explorer owners through the 4.0L V6 era, the 3.5L EcoBoost era, and the current front-wheel-drive-based platform. Here’s what to expect from your Explorer at every mileage milestone.
Explorer Issues by Generation
2002–2010 Explorer (4.0L V6 / 4.6L V8 era)
- 4.0L V6 timing chain failure: The SOHC 4.0L is notorious for timing chain issues, particularly the front chain and tensioner on the driver’s side. A rattling sound on cold start is the warning. This is a significant job — –,500 for chain replacement. Budget for the full kit.
- Rear axle seal leaks: The rear solid axle on these Explorers commonly develops axle seal leaks. Gear oil seeping onto the brake shoes causes brake fade and failure. Inspect the rear axle area regularly.
- Transfer case fluid (AWD models): The electric-shift transfer case and Control Trac system need clean fluid every 30,000 miles. Neglected fluid causes harsh engagement and eventual motor failure.
- Coolant leaks: Plastic intake manifold crossover and heater hose quick disconnects fail with age. Watch for low coolant warnings or sweet-smelling steam.
2011–2019 Explorer (3.5L EcoBoost / 3.5L NA V6 era)
- Exhaust fumes entering cabin: Ford issued recalls for this on multiple model years (2011–2017). Exhaust leaks near the rear of the vehicle could enter the cabin through seams. Check your VIN if you own an Explorer from this era.
- PTU (Power Transfer Unit) failure: The PTU transfers power from the front engine to the rear wheels. PTU fluid is often overlooked — Ford doesn’t always list it in the service schedule. We recommend checking PTU fluid every 30,000 miles. A failing PTU makes a whining or grinding sound that gets worse with speed.
- Rear Differential Unit (RDU) failure: The rear differential on these AWD Explorers also gets “lifetime” fluid that isn’t actually lifetime. RDU failure produces similar noises to the PTU. Fluid check/change every 30,000 miles prevents the ,500–,500 RDU replacement.
- 3.5L EcoBoost carbon buildup: Same as the F-150 EcoBoost — intake valve carbon deposits at 60,000–80,000 miles cause rough idle and power loss.
Explorer Transmission Issues
The 6-speed SelectShift automatic in 2011–2019 Explorers has had reports of harsh shifts, shuddering, and slow engagement. Fluid quality is a major factor — use Ford-spec Mercon LV only. A fluid change often resolves shift quality complaints on these transmissions before more serious internal wear occurs.
Explorer Suspension — Front End Wear
Explorers are family haulers that often see highway miles, loaded cargo, and occasional rough roads. Front struts typically need replacement at 80,000–100,000 miles on Oklahoma roads. Symptoms include a rough ride, clunking over bumps, or nose dive during braking. Front lower control arm bushings also wear, causing a vague steering feel. Full front suspension inspection is recommended at 75,000 miles.
Ford Explorer Service in Coweta, Oklahoma
Norm’s Auto Clinic services Ford Explorers for families throughout Coweta, Broken Arrow, Wagoner, Muskogee, and the Tulsa metro. Whether you need routine maintenance or a diagnosis of a specific concern, we’ll give you an honest assessment and a written estimate before any work begins. Visit us at 19 N. Broadway, Coweta, OK 74429, or call (918) 279-8100.