1.2 PureTech "Wet Belt" Degradation
SeriousEngineThe 1.2-litre PureTech three-cylinder petrol engine uses an internal timing belt submerged in engine oil. The rubber belt chemically degrades from fuel dilution and thermal cycling, flaking particulate debris into the engine oil. This debris clogs the oil pickup strainer, starving the top end of oil and blocking the vacuum pump, which abruptly eliminates servo braking assistance and can precipitate total engine seizure (addressed in UK recall R/2020/331).
Low engine oil pressure warning light on dashboard, Noticeable hardening of the brake pedal due to vacuum pump starvation, Visible fraying, cracks, or swollen width on the belt viewed through the oil filler cap, Check engine warning light accompanied by fault code P15A8 or P0011
- Inspect the timing belt width and surface through the oil filler cap using a gauge or torch
- Verify documented service history proving annual oil changes with correct PSA B71 2312 or B71 2010 spec oil
- Check DVSA database to confirm safety recall R/2020/331 has been completed