48V mild-hybrid battery and start-stop faults
- Typically appears
- 40,000+ miles
- What to inspect
- Watch for stop-start refusing to engage and warning messages on start-up

A 2023 Ford Puma is now 3 years old, so an average example has covered around 40,500 miles. A mid-run car · most launch faults had been addressed by this point, and wear items are the main risk at this age. Check the state safety inspection and service history alongside the documented faults below, which are sorted by whether a 2023 car has usually reached the mileage where they appear.
Compiled & reviewed by the VehicleFaults Research Team
The 2023 Ford Puma is 3 years old, so an average example has covered roughly 40,500 miles. At that mileage 1 of the documented faults are already due, so check those first. A further 4 typically appear later in the car's life.
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Build the inspection planDocumented onset mileage is at or below the ~41k miles an average 2023 car has covered.
48V mild-hybrid battery and start-stop faults
Age, electronics and build-related issues that are not mileage-driven.
Tailgate and boot 'megabox' drainage water ingress
Rear brake corrosion from low usage on hybrid cars
SYNC 3 infotainment system freezing or black screen
Typically appear later than this year's average mileage · worth budgeting for rather than inspecting.
Wet timing belt wear on 1.0 EcoBoost mHEV
Creaking or clunking from front strut top mounts
Hesitation or jerky shifts on 7-speed Powershift automatic
Coolant leaks from expansion tank seams or return pipes
Turn this car's known weak points into a step-by-step viewing plan · what to inspect, what a bad result means and what to ask the seller.
Build my inspection planNo, 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.
Focus on the exhaust active valve mechanism, which frequently seizes or rattles, and check the front limited-slip differential for fluid leaks if the Performance Pack is fitted. Additionally, ensure the engine idles smoothly, as coil pack failures and rough running are documented on heavily driven examples.
Ford mandates routine servicing every 18,000 miles or two years, whichever comes first. However, due to the sensitive nature of the oil pump and internal components on these engines, independent specialists strongly recommend annual oil changes using the exact Ford-specification lubricant to prevent premature wear.
The 7-speed Powershift dual-clutch transmission is generally robust but can suffer from software glitches or clutch pack wear. Jerky low-speed behaviour or delayed engagement are the main warning signs. Always ensure the transmission shifts seamlessly between park, drive, and reverse without hesitation during your initial inspection.
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