Wet timing belt wear on 1.0 EcoBoost mHEV
- Typically appears
- 60,000+ miles or 6 years
- What to inspect
- Ask for belt paperwork; inspect oil for belt debris

The Puma replaced the Fiesta at the top of UK registrations. Almost every car uses the 1.0 EcoBoost mHEV, so wet-belt evidence is the whole conversation.
Compiled & reviewed by the VehicleFaults Research Team · last reviewed August 2026
The most commonly reported faults on the 2019–2025 Ford Puma are Wet timing belt wear on 1.0 EcoBoost mHEV, 48V mild-hybrid battery and start-stop faults and Tailgate and boot 'megabox' drainage water ingress. Of the documented issues, 1 rated critical and 0 rated high · these are the ones worth inspecting first. Full inspection points, onset mileage and what to check are listed below.
Based on the documented faults on this page for the Ford Puma.
Guidance only · reflects reported patterns, not a specific car's condition.
Which faults an average example has usually reached depends on its age. Pick a model year for the faults that matter on that build.
Wet timing belt wear on 1.0 EcoBoost mHEV
48V mild-hybrid battery and start-stop faults
Tailgate and boot 'megabox' drainage water ingress
Rear brake corrosion from low usage on hybrid cars
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Check this exact carNo, a wet belt in oil. Treat missing belt history as a priced-in job.
Not usually, but a failing 48V battery throws warnings and puts buyers off on the test drive.
The megabox drain. Standing water there is a common and easily missed fault.
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.