Peugeot 308 (T9) Common Problems & Reliability
The Peugeot 308 (T9, 2013–2021) represents a significant leap in build quality and design over its predecessor, offering a refined driving experience that aligns well with UK consumer expectations for the family hatchback segment. However, this model generation is known for several well-documented reliability issues, largely engine-dependent. Prospective buyers should be exceptionally careful to distinguish between the different powertrain options before committing to a purchase. The most notorious concern involves the 1.2 PureTech petrol engines, which utilize a "wet belt" design where the timing belt runs submerged in engine oil. Over time, the belt material can degrade and shed rubber particles, which in turn clog the oil pickup strainer. This blockage leads to severe oil starvation, potential vacuum pump failure, and in worst-case scenarios, total engine seizure. It is non-negotiable that any 1.2 PureTech model must be accompanied by a meticulous service history proving adherence to reduced replacement intervals and the use of the specific oil grade required by PSA. Diesel-powered models (1.6 and 2.0 BlueHDi) are generally more robust, though they are not immune to issues. The AdBlue emission control system is a documented weak point, with internal pump or tank sensor failures often necessitating an expensive full-tank assembly replacement. Furthermore, the Diesel Particulate Filter (DPF) is sensitive to driving patterns; vehicles used predominantly for short, low-speed urban trips in the UK are prone to clogging, which can lead to limp-mode operation and, if ignored, cascading turbocharger damage. Beyond the engine bay, the 308 T9 can suffer from occasional electrical "gremlins," with the central SMEG/NAC infotainment screen occasionally prone to freezing, lagging, or erratic behaviour. While software updates can mitigate some of these issues, persistent electronic faults may require more involved diagnostic work. Given these factors, while the 308 T9 can be a highly satisfying and economical family car, it is not a "fit-and-forget" vehicle, and success in ownership depends heavily on prior maintenance diligence.
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Detailed fault breakdown, symptoms, and estimated repair bills by production year.
Most Common Peugeot 308 (T9) Faults & Repair Costs
1.2 PureTech "Wet Belt" Degradation
The timing belt runs in oil and can degrade, shedding debris that blocks the oil pickup. This leads to oil starvation, vacuum pump failure, and a dangerous loss of braking assistance (Recall R/2020/331).
Low oil pressure warning, Hard brake pedal, Engine fault light, Furry/cracked belt visible through filler cap
- Check belt condition via oil filler cap
- Verify 0W-30/0W-20 oil usage
- Check recall R/2020/331 history
AdBlue / BlueHDi Emissions Failure
Very common tank/pump failure on BlueHDi models.
Buying a used Peugeot 308 (T9)? Always check for hidden finance and write-off history.
Mechanical problems are only half the battle. Over 1 in 3 UK used cars checked have unpaid finance or accident write-off records that could cause you to lose the car or thousands in value.