2021 Peugeot 3008: common problems and MOT failures

Common 2021 Peugeot 3008 MOT failures and advisories

The share of 2021 Peugeot 3008 MOT tests where testers flagged each area, as a fail or an advisory. Rough prices are typical independent-garage costs.

• Tyres
  27% of testsRough price £70–£150

  At the viewing: Check the tread on all four tyres, including the inside edges, and look for cracks or bulges.

• Brakes
  17% of testsRough price £150–£350

  At the viewing: Look for a lip on the disc edges and feel for judder or pulling when braking firmly from about 40mph.

• Wipers, windscreen and mirrors
  4% of testsRough price £15–£250

  At the viewing: Check for chips in the driver's view, and test the wipers and washers.

• Seats and seatbelts
  4% of testsRough price £80–£250

  At the viewing: Pull each seatbelt sharply. It should lock, and retract cleanly.

• Lights and electrics
  2% of testsRough price £10–£80

  At the viewing: Ask a friend to check every light, including brake lights and indicators, while you operate them.

• Suspension
  1% of testsRough price £120–£400

  At the viewing: Listen for knocks over speed bumps, and look behind each front wheel for a snapped coil spring.

Known faults on the 2021 Peugeot 3008

Reported by owners, mechanics and buying guides for this model and age. Check which engine the car has, as some apply to one engine only.

• Timing belt that runs in oil (PureTech petrol)

  1.0 and 1.2 PureTech petrol

  The 1.0 and 1.2 PureTech petrol engines use a timing belt that runs in the engine oil (a “wet belt”). It can break down early and shed rubber that blocks the oil supply, which can wreck the engine. Some also burn too much oil. Stellantis now covers earlier engines for belt and oil-burning problems for up to 10 years or 112,000 miles, as long as the car has been serviced on schedule.

  At the viewing: Ask for a full service history showing the right oil, and when the belt was last checked or changed. Check the oil level on the dipstick, and that no oil-pressure or engine warning light stays on.

  Source: Parkers: Stellantis wet belt compensation, and the cars at risk, Stellantis: compensation policy for earlier PureTech 1.0 and 1.2 engines (7 May 2025)

• DPF, AdBlue and emissions campaigns (diesel)

  Diesel

  A plastic exhaust part could damage the particulate filter on cars built Jan to May 2018, the AdBlue system could block on cars built Oct 2019 to Mar 2020, and some cars built 2017 to 2019 need an emissions update. Diesels have more exhaust and engine faults than petrols.

  At the viewing: Watch for warning lights and ask a dealer about outstanding work.

  Source: What Car?: used Peugeot 3008 (2017-2024) reliability

• Infotainment and warning light glitches

  All engines

  Owners report faulty infotainment and erratic warning lights.

  At the viewing: Use the screen and check no warnings stay on.

  Source: What Car?: used Peugeot 3008 (2017-2024) reliability

Questions to ask the seller before buying a 2021 Peugeot 3008

Ask before you travel to see it. A seller who knows the car will have answers, and receipts.

1. When was the timing belt last checked or changed, and has it had the right oil at every service? Is the car still within Stellantis’ extended PureTech cover?
2. Can I see the service history and receipts for any big jobs?