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 1.2 PureTech three-cylinder petrol engine utilises a wet timing belt operating submerged in engine oil. Fuel contamination and thermal stress cause belt rubber to degrade, shedding fibrous particles into the engine sump. These particles block the oil pump strainer, causing severe oil starvation, vacuum pump failure, and loss of assisted braking (UK recall R/2020/331), with catastrophic engine failure if unaddressed.
Low oil pressure warning lamp illuminated while driving, Sudden firm or unassisted brake pedal due to vacuum pump blockage, Engine warning light illuminated with variable valve timing fault codes, Visible degradation or swelling of the belt when viewed through the oil filler cap
- Measure timing belt width through the oil filler cap using the PSA measuring tool
- Verify complete service history proving annual oil changes with PSA B71 2312 or B71 2010 oil
- Check DVSA recall records to confirm safety recall R/2020/331 has been completed
AdBlue / BlueHDi Emissions Failure
BlueHDi diesel engines (1.6 and 1.5 variants) utilize an integrated AdBlue tank assembly housing the urea delivery pump, heater, and level sensor. Urea crystallisation and circuit board failure cause delivery failure, illuminating the UREA warning lamp and initiating a non-restart countdown (commencing at 700 miles). Because the tank is a factory-sealed unit, replacement of the complete tank is required.
UREA and engine management warning lights illuminated on instrument cluster, Driver information display shows non-restart countdown: "Starting impossible in 700 miles", Crystallised white urea residue visible on tank casing underneath the luggage compartment, Diagnostic fault codes P20EE, P208E, or P20A2 logged in engine control module
- Turn on ignition to check instrument display for active UREA warning symbols or mileage countdowns
- Review service paperwork for previous dealer AdBlue tank replacements or software updates
- Examine the underbody area around the AdBlue tank for dried white powder indicating urea leakage
1.5 BlueHDi Camshaft Timing Chain Snapping
The 1.5-litre BlueHDi (DV5R) 16-valve engine introduced in late 2017 uses a 7mm chain connecting the twin overhead camshafts. The chain is prone to excessive wear and stretching, producing metallic rattle before snapping suddenly. Chain failure bends valves, cracks camshaft carriers, and destroys the cylinder head. Stellantis introduced an 8mm upgraded chain kit and revised cylinder head housing to resolve the defect.
Metallic rattling or ticking sound from top of cylinder head on cold startup, Sudden engine cut-out under power followed by failure to crank or restart, Starter motor spins rapidly without resistance due to total loss of cylinder compression, Check engine light with stored camshaft-to-crankshaft timing correlation fault codes
- Listen for metallic ticking or slapping noise near the camshaft cover during cold idle
- Check service history to confirm if the 8mm camshaft chain conversion kit has been fitted
- Verify oil changes were strictly performed every 12 months using approved PSA B71 2010 (0W-20) oil
SMEG and NAC Touchscreen Infotainment Freezing
The central 9.7-inch touchscreen controls navigation, radio, and all ventilation and heater settings. On early SMEG and later NAC units, internal memory corruption and software bugs cause freezing, black screens, sluggish response, and random reboots. When the screen freezes, occupants cannot adjust cabin heating, fan speeds, or windscreen demisting.
Central touchscreen completely black or frozen on the Peugeot startup logo, Inability to adjust climate control temperature, air distribution, or fan blower speed, Frequent audio freezing, volume control lag, or Bluetooth call disconnects, Navigation system sluggish to respond to address inputs or route recalculations
- Test heating and air conditioning controls through the screen to ensure swift temperature changes
- Cycle through radio, sat-nav, and setup screens to detect system lag or freezes
- Check whether the unit has been upgraded to the latest manufacturer firmware version
Front Suspension Wishbone Bush and Drop Link Deterioration
The EMP2 platform front suspension utilizes rubber lower control arm rear bushes and anti-roll bar drop links that wear quickly when subjected to speed humps and potholed UK roads. Perished rubber bushes cause steering wander, knocking over bumps, and accelerated uneven tyre shoulder wear, frequently resulting in UK MOT test advisories or failures.
Dull clunking or knocking noise from front suspension when traversing speed humps, Vagueness in steering response or slight wandering under heavy braking, Uneven wear on inner or outer edges of front tyres, MOT test advisories for play in front lower suspension arm ball joints or bushes
- Drive over speed cushions and uneven tarmac while listening for front-end suspension thuds
- Inspect lower wishbone rear bushes visually for cracked, torn, or displaced rubber
- Review MOT history on GOV.UK for recurring front suspension bush or link advisories
Rear Torsion Beam Axle Creaking and Noise
On 2013–2018 T9 models, the hollow rear torsion beam axle can develop internal stress clicks or creaks over uneven surfaces and road camber changes. The metallic creaking originates from internal axle welding and damping voids. Peugeot issued technical service bulletins advising technicians to inject expanding structural polyurethane foam into the beam or replace the axle.
Loud metallic creak or clicking noise from rear axle when negotiating uneven road surfaces, Creaking noise audible inside cabin when driving slowly across driveway thresholds or dropped kerbs, Persistent rear suspension noise that remains unchanged after renewing dampers or springs, Acoustic resonance transmitted into rear passenger footwells
- Bounce the rear corners of the vehicle vigorously while stationary to listen for axle creaks
- Test drive across dropped kerbs, speed humps, and angled driveways to listen for rear clicking sounds
- Check service history records to see if rear axle foam injection or axle replacement was conducted
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.