EngineCritical
1.2 PureTech wet belt failure on petrol models
- Typically appears
- 60,000+ miles or 6 years
- What to inspect
- Check belt history and oil condition
2014–2025 Peugeot 308 · common problems & known faults
A mainstream family hatch and estate. Diesel versions dominate used stock, so emissions hardware leads the check.
Compiled & reviewed by the VehicleFaults Research Team · last reviewed August 2026
Quick answer
The most commonly reported faults on the 2014–2025 Peugeot 308 are 1.2 PureTech wet belt failure on petrol models, BlueHDi DPF and AdBlue injector faults and Harsh metallic rattling from the top of the engine on cold start due to 1.5 BlueHDi camshaft chain tensioner failure. Of the documented issues, 1 rated critical and 2 rated high · these are the ones worth inspecting first. Full inspection points, onset mileage and what to check are listed below.
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Build the inspection planReliability snapshot
Based on the documented faults on this page for the Peugeot 308.
3.1/ 10
- Critical
- 1
- High
- 2
- Medium
- 5
- Low
- 0
Guidance only · reflects reported patterns, not a specific car's condition.
Known faults to check
ExhaustHigh
BlueHDi DPF and AdBlue injector faults
- Typically appears
- 70,000+ miles
- What to inspect
- Check AdBlue level warnings and forced regen history
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Build the inspection planElectricalMedium
Infotainment, air conditioning control and sensor faults
- Typically appears
- Age-related
- What to inspect
- Test climate, screen and all sensors
TransmissionMedium
EAT6 and EAT8 automatic hesitation
- Typically appears
- 70,000+ miles
- What to inspect
- Drive from cold in slow traffic
SuspensionMedium
Creaking or knocking noise from the rear axle over uneven surfaces due to failing beam bushes.
- Typically appears
- 40,000-70,000 miles
- What to inspect
- Push down firmly on the rear boot sill multiple times to bounce the suspension and listen for creaks, or drive over forecourt speed bumps.
BodyworkMedium
Water ingress into the boot area caused by failing tailgate seals or rear light cluster gaskets.
- Typically appears
- 4-6 years
- What to inspect
- Lift the boot floor carpet and check the spare wheel well for standing water or rust stains. Feel the side carpets for dampness.
EngineHigh
Harsh metallic rattling from the top of the engine on cold start due to 1.5 BlueHDi camshaft chain tensioner failure.
- Typically appears
- 50,000-80,000 miles
- What to inspect
- Perform a cold start with the bonnet open. Listen closely to the top cam cover area for a metallic rattle lasting a few seconds.
BrakesMedium
Electronic parking brake (EPB) fails to release fully, causing rear brake binding and excessive heat.
- Typically appears
- 60,000-90,000 miles
- What to inspect
- Engage and disengage the EPB switch multiple times, listening for strained motor noises. Roll the car in neutral on a flat surface to check for resistance.
Inspecting a Peugeot 308?
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Build my inspection planFrequently asked questions
Is the SW estate worth stocking?
Yes. It is one of the biggest boots in the class and sells well to families and taxi buyers.
What is the top risk on petrol cars?
The wet belt, without exception. Everything else is secondary.
Do AdBlue faults stop cars?
Yes. A failed AdBlue system will eventually prevent the car starting, so never ignore the warning.
How do I check the battery health on the Hybrid 180/225 models?
Dealers cannot easily access exact state of health without Diagbox or a dedicated EV diagnostic tool. However, you can check the dashboard for the estimated electric range at full charge. Expect around 25 to 30 miles in mild UK weather; anything significantly lower suggests degradation or cell imbalance.
Which trim levels offer the best resale value for forecourt stock?
GT Line on the T9 and GT on the P5 are the most desirable trims, offering upgraded alloy wheels, LED headlights, and sportier interior styling. Active and Allure trims are harder to shift unless priced aggressively. Buyers actively seek out GT Line for aesthetic appeal without higher insurance groups.
Should I avoid the 1.5 BlueHDi in favour of the older 1.6 unit?
The 1.6 BlueHDi is generally more robust regarding valvetrain components, but the 1.5 BlueHDi offers better emissions compliance and fuel economy. If stocking the 1.5, you must verify if the 7mm camshaft chain has been upgraded to the 8mm version, as early 7mm chains are prone to catastrophic failure.
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.
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