Used Peugeot 308 Buying Guide: The 1.2 PureTech Timing Chain Isn't a Rumour — Here's What to Do

The 1.2 PureTech problem is real — but it doesn't mean every 308 is a liability.

If you've researched a used 308, you've seen the PureTech timing chain discussions. Here's the honest picture: the fault is real, it's documented (Peugeot faced class action proceedings in France over it), and it affects pre-2017 three-cylinder cars most acutely. But the Mk2 308 is also one of the better-driving cars in its class, and the fault is manageable if you know what to check before you buy. The buyer who pays full money for a pre-2017 PureTech without checking the MOT history or listening for chain noise on startup has taken on risk they didn't need to. This guide tells you exactly what to look for.

Mk1 or Mk2 — there is only one sensible answer

The Mk1 308 (2007–2013) feels dated now and has its own reliability concerns. Unless budget forces you below £4,500, the Mk2 (2013–2021) is the car to buy: sharper dynamics, much better interior, and the option of the more efficient PureTech and BlueHDi engines. Within the Mk2, the facelift (2017–2021) introduced a running improvement to the PureTech chain — a stronger tensioner and revised chain guide. Cars built from mid-2017 have a meaningfully better reliability record on this specific fault.

• Mk1 (2007–2013): avoid unless budget is sub-£4,500. Outdated and more fault-prone.
• Mk2 pre-facelift (2013–2017): fine buy if PureTech chain has been checked or replaced. Price in the risk.
• Mk2 facelift (2017–2021): preferred — running improvements to PureTech, better kit, lower chain risk.

The 1.2 PureTech timing chain: what it costs and what the MOT history shows

The PureTech 1.2 three-cylinder is a compact, award-winning engine with a documented weak point: the chain tensioner on pre-2017 cars. As mileage accumulates the tensioner weakens, allowing chain slack. Symptoms are a rattle or whine from the front of the engine on cold start that clears as the engine warms. Left unaddressed, the chain can jump or snap — engine damage at that point is severe. A chain and tensioner replacement on a 308 costs £600–£1,200 at an independent. This shows in the MOT/DVSA record as engine advisory notes — 'engine noise', 'timing chain rattle' or similar observations from the tester. A car with repeated engine noise entries across multiple test cycles has been running with this problem for years. Run the free check before you book a viewing.

• Pre-2017 PureTech: listen for cold-start chain rattle. Budget £600–£1,200 if present.
• Post-2017 PureTech: improved tensioner — lower risk, but still worth a cold-start check.
• MOT history: look for 'engine noise' or 'timing chain' advisories — each one is a warning the seller won't volunteer.

The 1.6 THP petrol: carbon build-up and the high-pressure fuel pump to watch

The 1.6 THP (125ps or 155ps) is the older turbocharged petrol option found mainly on GT and GT Line trims. It's a direct-injection engine — fuel is injected straight into the cylinder rather than the intake port, meaning petrol never washes over the intake valves. Carbon deposits build up on those valves over time. At high mileage (80,000+) this causes rough idle, hesitation, and reduced power. A professional carbon clean costs £200–£400. The THP also uses a high-pressure fuel pump that can develop noise or reduced performance at high mileage. This shows in the MOT/DVSA record as fuel system advisories or repeated starting difficulty entries. The THP is a good engine when maintained — but it needs more attention than the PureTech at equivalent mileage.

The 1.6 BlueHDi diesel: the motorway car that hates short trips

The 1.6 BlueHDi (100ps or 120ps) is smooth, economical, and well-proven. The risk is identical to every other modern diesel: the DPF. A 308 used for urban commuting or school runs will have a DPF that struggles to regenerate. This shows in the MOT/DVSA record as 'emission failure' or 'exhaust smoke opacity exceeds limits'. Two or more such entries means the DPF has been a problem for longer than the seller will tell you. Budget £400–£600 for a professional clean, or £800–£1,000 for a replacement. GT Line trim at this engine choice comes with larger brake discs — higher servicing cost but better stopping performance.

What your budget actually buys

At £4,000–£6,500 you're buying pre-facelift Mk2 cars — check PureTech chain status carefully. A pre-purchase inspection is justified. At £7,000–£10,000 the facelift Mk2 is accessible — 2017–2019 cars with 40,000–65,000 miles in Allure or GT Line trim. This is the sweet spot. At £10,000–£14,000 you reach low-mileage facelift cars — often with full PSA dealer history.