EngineHigh
3.5L EcoBoost cam phaser rattle / timing components on cold start.
- Typically appears
- 60,000+ miles
- What to inspect
- Cold-start the truck and listen for a rattle in the first few seconds.
2015–2020 Ford F-150 · common problems & known faults
The aluminum-body F-150 is capable and popular, but the EcoBoost V6s and 10-speed automatic have specific issues worth checking.
Compiled & reviewed by the VehicleFaults Research Team · last reviewed July 2026
Quick answer
The most commonly reported faults on the 2015–2020 Ford F-150 are 3.5L EcoBoost cam phaser rattle / timing components on cold start, 3.5L EcoBoost internal water pump — a failure can leak coolant into the engine and 10-speed automatic harsh or erratic shifts. 2 of the documented issues are rated high severity · inspect these first. Full inspection points, onset mileage and what to check are listed below.
Reliability snapshot
Based on the documented faults on this page for the Ford F-150.
7.0/ 10
- Critical
- 0
- High
- 2
- Medium
- 1
- Low
- 1
Guidance only · reflects reported patterns, not a specific car's condition.
Ford F-150 problems by year
Which faults an average example has usually reached depends on its age. Pick a model year for the faults that matter on that build.
Known faults to check
EngineHigh
3.5L EcoBoost internal water pump — a failure can leak coolant into the engine.
- Typically appears
- 80,000+ miles
- What to inspect
- Check coolant level and history; ask about any pump replacement.
TransmissionMedium
10-speed automatic harsh or erratic shifts.
- Typically appears
- Any
- What to inspect
- Test-drive through varied speeds and feel for harsh 1-2 or clunky downshifts.
BodyLow
Aluminum panel corrosion / dissimilar-metal reactions at fasteners.
- Typically appears
- Age-related
- What to inspect
- Inspect panel edges, tailgate and around body seams for bubbling paint.
Inspecting a Ford F-150?
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Check this exact carFrequently asked questions
Which F-150 engine is most reliable?
The 5.0L V8 and 3.5L EcoBoost are both strong; the EcoBoost needs cam-phaser and water-pump attention with age.
Is the 10-speed transmission a problem?
Many are fine, but some shift harshly; a test-drive and fluid check are essential.
Does the aluminum body rust?
The aluminum won't rust like steel, but watch for corrosion where dissimilar metals meet.
Sources & further reading
Faults are compiled from documented recalls, technical bulletins, owner reports and mechanic sources, then reviewed for accuracy. This is guidance only · not a substitute for a professional inspection.