The 2017 Transit is a workhorse that's generally reliable for commercial duty, but the 3.5L EcoBoost has catastrophic engine failure issues, while 3.7L V6 models tend to be bulletproof with mostly minor annoyances.
3.5L EcoBoost Catastrophic Engine Failure (Piston Ring Land Fracture)
Occasional · high severityTypical onset: 60,000-120,000 mi
Symptoms: Sudden loss of power under load, White or blue smoke from exhaust, Severe misfires, Metallic knocking, Coolant loss with no external leaks, Oil consumption 1+ quart per 1,000 miles
Fix: Complete engine rebuild or replacement required. Piston ring lands crack, causing compression loss and catastrophic damage. 20-30 hours labor for long block swap, more if doing in-frame rebuild. This is the Transit's Achilles heel on EcoBoost models.
Estimated cost: $8,000-15,000
Transmission Oil Cooler Line Failure
Common · high severityTypical onset: 40,000-80,000 mi
Symptoms: Transmission fluid puddle under vehicle, driver side, Pink fluid dripping from frame rail, Sudden transmission overheating, Harsh shifts or slipping after fluid loss
Fix: Steel hard lines that run along frame corrode and rupture where they connect to cooler. Ford redesigned these lines mid-2017 production. Replace both lines (don't just patch), flush cooler, refill transmission. 3-4 hours labor.
Estimated cost: $600-1,200
Driveshaft Center Support Bearing Failure
Common · medium severityTypical onset: 70,000-110,000 mi
Symptoms: Vibration at 45-55 mph that smooths out at highway speed, Clunking on acceleration/deceleration, Rumbling from underneath center of vehicle
Fix: Two-piece driveshaft setup uses center carrier bearing that wears prematurely, especially on extended-wheelbase models. Replace entire driveshaft assembly (bearing not sold separately by Ford). 2-3 hours on a lift.
Estimated cost: $800-1,400
Rear Camera Wiring Harness Corrosion
Common · low severitySymptoms: Intermittent 'Camera Unavailable' message, Black screen when shifting to reverse, Works when cold, fails when warm, Static or lines on backup camera display
Fix: Wiring harness behind rear doors gets water intrusion where it passes through body. Corroded pins at camera connector. Need to pull inner panels, inspect/repair harness, reseal grommets. Ford issued TSB but no recall. 1.5-2.5 hours labor depending on wire damage.
Estimated cost: $250-600
Seat Base Frame Cracking (Driver Seat)
Occasional · medium severityTypical onset: 50,000-90,000 mi
Symptoms: Driver seat sits lower on one side, Clunking or popping when getting in/out, Visible cracks in seat frame tubes, Seat tilts or rocks unexpectedly
Fix: Multiple recalls for seat frame welds failing, but not all VINs covered. Steel tubing in base cracks at weld points, particularly on high-use commercial vans. Requires seat frame replacement. Covered under recall if applicable (check VIN), otherwise 2-3 hours labor.
Estimated cost: $400-900
Parking Brake Cable Seizing
Occasional · medium severityTypical onset: 60,000-100,000 mi
Symptoms: Parking brake pedal won't release fully, Rear brake drag, especially driver side, Parking brake won't engage or hold on hills, Burning smell from rear brakes after driving
Fix: Parking brake cables corrode in the sheaths, especially in salt-belt states. Cable won't retract, causing brake drag and premature shoe wear. Replace both rear cables and lubricate linkage points. 2-3 hours labor.
Estimated cost: $400-700
Fuel Filter Clogging (3.5L EcoBoost)
Occasional · medium severityTypical onset: 40,000-70,000 mi
Symptoms: Hard start after sitting overnight, Loss of power under acceleration, Rough idle when warm, Check engine light with fuel pressure codes P0087/P0088
Fix: EcoBoost models are sensitive to fuel quality. Filter clogs prematurely, especially with biodiesel blends or contaminated fuel. Located under vehicle near fuel tank. Replace filter, use Top Tier fuel going forward. 1 hour labor.
Estimated cost: $150-300
Buy a 3.7L V6 model without hesitation; avoid the 3.5L EcoBoost unless you enjoy gambling with five-figure engine bills.
AI-assisted summary drawn from NHTSA recall data, our labor-times database, and platform knowledge. Not a substitute for a pre-purchase inspection on a specific vehicle.