2018 Peugeot 2008 1.6L Diesel · PW12 JWW

The 1.2-litre PureTech petrol engine (EB2/EB2DT/EB2DTS) uses a wet timing belt running submerged in engine oil. The belt degrades over time, shedding rubber particles that clog the oil-pump pickup strainer, causing low oil pressure, vacuum pump failure and loss of brake servo assistance. Fuel dilution from short UK urban journeys accelerates wear. Stellantis extended the warranty to 10 years/112,000 miles for affected engines built April 2014 to June 2022. A degraded belt can lead to terminal engine damage if not caught early.

On 1.6 BlueHDi diesel variants, the AdBlue (SCR) tank houses an integrated pump, filler-cap vent valve and dosing injector. Urea crystallisation, pump failure or a blocked vent can trigger an AdBlue or emissions warning and a countdown to engine no-start. The tank and pump are replaced as a sealed unit. Fault codes such as P20E8, P21C5 or P20EE may be stored. This is a high-risk issue on UK BlueHDi examples typically seen from around 60,000 miles.

First-generation diesel 2008s fitted with a DPF can suffer oil contamination if the DPF regeneration cycle is interrupted mid-way — for example by switching the engine off during a forced regen. Fuel leaks into the oil system, gradually raising the oil level and risking engine damage. This is especially relevant to UK cars used predominantly on short, low-speed urban trips where the DPF rarely reaches regeneration temperature. Regular motorway running and checking the oil level are essential preventative measures.