4.0L SOHC Timing Chain & Guide Failure
high- Typically appears
- 80–160k mi
- Estimated repair
- $1,200 – $2,800
2007 Ford
Explorer Sport TracPickup
4.6L V8 · Pickup
The 2007 Ford Explorer Sport Trac is a mid-size pickup built on the Explorer's unibody platform — an unusual blend of SUV comfort and open-bed utility. Ford revamped the Sport Trac significantly for 2007, introducing a new body style, the 4.0L SOHC V6 as the base engine, and a 4.6L V8 as the upgrade. It seats four in a crew-cab layout and carries a 4-foot cargo bed, making it more of a lifestyle truck than a heavy-hauler. The Sport Trac occupies a niche that most full-size truck buyers overlook but suburban drivers appreciate: it parks like a car, rides like an SUV, and still handles weekend loads without drama. The 4.6L V8 trim is notably more capable and, ironically, often more reliable long-term than the 4.0L V6, which has a well-documented timing chain problem. At this point in its life, a 2007 Sport Trac will be well past 100k miles. The VCT (variable cam timing) system on the 4.0L and 4.6L engines is the single biggest thing to watch. Keep oil changes current, inspect the undercarriage for rust (Wisconsin roads are brutal), and this truck can provide many more years of solid service.
Reliability
3/5
Verified data
Engine
4.6L V8
Drivetrain
4WD
Fuel
Gasoline
MPG
14 city / 20 hwy / 16 combined
Seats
4
Doors
4
Body
Pickup
MSRP
$31,395
Overview
AI-curatedThe 2007 Ford Explorer Sport Trac is a mid-size pickup built on the Explorer's unibody platform — an unusual blend of SUV comfort and open-bed utility. Ford revamped the Sport Trac significantly for 2007, introducing a new body style, the 4.0L SOHC V6 as the base engine, and a 4.6L V8 as the upgrade. It seats four in a crew-cab layout and carries a 4-foot cargo bed, making it more of a lifestyle truck than a heavy-hauler. The Sport Trac occupies a niche that most full-size truck buyers overlook but suburban drivers appreciate: it parks like a car, rides like an SUV, and still handles weekend loads without drama. The 4.6L V8 trim is notably more capable and, ironically, often more reliable long-term than the 4.0L V6, which has a well-documented timing chain problem. At this point in its life, a 2007 Sport Trac will be well past 100k miles. The VCT (variable cam timing) system on the 4.0L and 4.6L engines is the single biggest thing to watch. Keep oil changes current, inspect the undercarriage for rust (Wisconsin roads are brutal), and this truck can provide many more years of solid service.
Known for
- Unibody SUV-based platform — smoother ride than body-on-frame trucks
- 4.6L V8 option with decent towing for a mid-sizer (about 5,600 lbs)
- Crew-cab four-door layout with standard 4-foot composite bed
- Available AdvanceTrac with Roll Stability Control
Best for
- Suburban drivers who want occasional truck utility without full-size truck bulk
- Light hauling and towing (kayaks, ATVs, small trailers)
- Buyers who prioritize car-like ride quality over raw payload
- Four-season use with 4WD models in Wisconsin winters
Watch for
- 4.0L SOHC V6 timing chain and VCT system failures — expensive and common
- Rust on frame, bed floor, and rocker panels on high-mileage Midwest examples
- 4.6L VCT solenoid issues causing rough idle and CEL codes
- Tailgate and tonneau cover mechanisms that wear out over time
Common issues by mileage
6 knownVCT Solenoid / Phaser Failure (4.6L V8)
medium- Typically appears
- 80–150k mi
- Estimated repair
- $300 – $900
Oxygen Sensor / O2 Heater Circuit Failure
medium- Typically appears
- 100–180k mi
- Estimated repair
- $150 – $400
Rust — Rocker Panels, Bed Floor, Frame Rails
high- Typically appears
- Any mileage on Midwest/salt-belt vehicles
- Estimated repair
- $500 – $3,500
ABS / Stability Control Module or Wheel Speed Sensor Faults
medium- Typically appears
- 100–200k mi
- Estimated repair
- $200 – $800
CAN Bus / Module Communication Errors
low- Typically appears
- 100k+ mi
- Estimated repair
- $150 – $600
Maintenance schedule
- 1 Every 5,000 mi or 6 months — do NOT stretch to 7,500+ mi Engine oil & filter change
The VCT system and timing chain guides depend entirely on clean, full-pressure oil. Dirty or low oil is the #1 cause of the Sport Trac's most expensive repairs. Use the viscosity on the oil cap — 5W-20 for the 4.6L.
- 2 Inspect at 100k mi; replace solenoids if sluggish idle or P001x codes appear VCT solenoid screen cleaning or replacement
Sludge clogs the small screens on the VCT solenoids. Cleaning or replacing them is cheap insurance against a full phaser/chain job.
- 3 Every 60k mi or 5 years Coolant flush
Ford's orange DEX-COOL-type coolant degrades and can become acidic, attacking the thermostat housing, water pump, and heater core — all of which are expensive on this engine.
- 4 Every 60k mi on V6; every 60–80k mi on V8 Spark plugs
The 4.6L uses platinum plugs. Waiting too long risks the plugs seizing in the aluminum heads — removal then becomes a major labor job.
- 5 Every 30k mi on 4WD models Transfer case and front differential fluid
The electronic shift-on-the-fly transfer case is sensitive to fluid condition. Fresh fluid prevents shift hesitation and motor wear.
- 6 Every 2–3 years regardless of mileage Brake fluid flush
Moisture absorption lowers boiling point. With Wisconsin winters and heavy braking on wet/icy roads, degraded brake fluid is a hidden safety risk.
- 7 Every fall before road salt season Undercarriage rust inspection & treatment
Unibody construction means structural rust is a frame integrity issue, not just cosmetic. Catch it early with a fluid film or undercoating treatment.
- 8 Every fall; replace proactively after 4–5 years Battery load test
Cold-cranking demands in Wisconsin winters expose weak batteries. A battery that passes a summer test can fail at -10°F. Load test in October, not January.
Always defer to the manufacturer's service manual for warranty-mandated intervals.
Cost of ownership
Annual maintenance
$700 – $1,800
Fuel
At ~16 MPG combined and typical Wisconsin driving, expect $2,000–$2,800/year at current mid-grade pump prices. The 4.0L V6 gets slightly better mileage (~17 combined) but the difference is modest.
Insurance
Mid-size truck/SUV class; expect $900–$1,400/year for full coverage on a vehicle this age, depending on driving record and carrier.
Day-to-day costs are reasonable if you stay on top of oil changes — skipping them turns a $60 service into a $2,000+ timing chain job. Budget on the higher end of maintenance if the vehicle is past 120k miles or has an incomplete service history. Rust remediation is a wildcard cost specific to Midwest examples and can easily push a single season's expense well above average.
Seasonal care
Lake Geneva, WI Winter
- Load-test the battery every October. The 4.6L V8 has a healthy appetite for cold-cranking amps; a marginal battery will leave you stranded at -15°F.
- Switch to 5W-20 full synthetic if not already — it flows immediately at cold starts and protects the VCT system during the critical first seconds of startup.
- Flush and fill windshield washer fluid with a -30°F or colder rated fluid before temps drop. The factory reservoir is plastic and can crack if water-based fluid freezes.
- Apply fluid film or similar corrosion inhibitor to the entire undercarriage, paying special attention to the unibody frame rails, rocker panels, and bed floor seams.
- Inspect 4WD engagement before the first snowfall — don't discover a stuck transfer case motor in a parking lot during a blizzard.
- Keep at least a half tank of fuel to add weight over the rear, reduce fuel line moisture, and ensure you're never stranded with a near-empty tank in extreme cold.
Summer
- Check tire pressure monthly — pressures drop roughly 1 PSI per 10°F of temperature change, and summer heat can mask a slow leak that becomes dangerous.
- Inspect and recharge the A/C system if cooling is weak — the Sport Trac's cabin is large and the A/C works hard in humid Wisconsin summers.
- Check coolant level and condition when the engine is cold. Summer heat accelerates coolant breakdown; a low or rusty reservoir is a pre-boil warning.
- Inspect belts and hoses for cracking after winter — extreme cold followed by summer heat cycles rubber components aggressively on older trucks.
- Clean and inspect the bed drain plugs and bed seams for standing water, which accelerates the floor rust common on these trucks.
Comparable vehicles
2007 Chevrolet
Colorado
Smaller footprint, body-on-frame construction, similar price segment. Better for buyers who want more traditional truck capability but less interior space.
2007 Honda
Ridgeline
Same unibody/car-based pickup concept, AWD standard, Honda reliability reputation. More refined ride but lower tow rating and no 4-low range.
2007 Nissan
Frontier
Body-on-frame mid-size truck, similar price range, stronger off-road credibility. Better long-term rust resistance than the Sport Trac on Midwest roads.
2007 Toyota
Tacoma
The benchmark mid-size truck of the era. Stronger resale, better proven reliability, but harder to find at low prices; body-on-frame with superior long-term durability.
If you're shopping for one
Red flags
- Cold-start timing chain rattle on the 4.0L V6 — walk away or budget $1,500–$2,800 for an immediate repair.
- Active P0012, P0015, P0022, or P0025 codes indicating over-retarded cam timing — points to phaser or solenoid failure.
- Perforated or bubbling rust on rocker panels or frame rails — unibody rust repair is labor-intensive and expensive.
- Evidence of oil leaks around the valve cover gaskets combined with sludgy oil — classic deferred-maintenance combo.
- 4WD that won't engage, grinds, or throws U-codes — transfer case or module issues can be costly to diagnose and repair.
What to inspect
- Pull a scan for P001x/P002x VCT codes even if the check engine light is off — intermittent codes can clear themselves but indicate an active problem.
- Ask specifically about timing chain noise: a cold-start rattle in the first 2–3 seconds that disappears is a serious red flag on the 4.0L V6.
- Inspect the rocker panels, bed floor, and the underside of the cab corners by hand — poke with a screwdriver if needed. Rust perforation here is structural on a unibody.
- Test 4WD in all modes (2H, 4H, 4L) before purchase. Listen for clunks or hesitation when engaging.
- Check for oil sludge under the oil cap and on the dipstick — heavy sludge signals neglected oil changes and predicts near-term VCT/timing chain failure.
- Verify the tailgate and bed latches work smoothly; replacement parts are increasingly hard to find for this model.