2021 BMW 218I: common problems and what to check
What gets flagged at MOT on 2021 BMW 218Is, from 8,010 tests in 2025, plus known faults and what to look at before you buy one.
What gets flagged at MOT
The share of 2021 BMW 218I MOT tests where testers flagged each area, as a fail or an advisory. Rough prices are typical independent-garage costs.
- Tyres27% 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.
- Brakes8% 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.
- Lights and electrics3% of testsRough price £10–£80
At the viewing: Ask a friend to check every light, including brake lights and indicators, while you operate them.
- Wipers, windscreen and mirrors3% of testsRough price £15–£250
At the viewing: Check for chips in the driver's view, and test the wipers and washers.
- Seats and seatbelts2% of testsRough price £80–£250
At the viewing: Pull each seatbelt sharply. It should lock, and retract cleanly.
- Suspension2% 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
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.
- Blocked particulate filter (diesel)Diesel
Diesels mostly used for short trips can block their particulate filter.
At the viewing: Ask how the car was used, and watch for a DPF warning.
Source: What Car?: used BMW 2 Series Active Tourer (2014-2021) reliability
- Trim and electrical faultsAll engines
Interior trim was the most common complaint in What Car?'s survey, then electrics and infotainment. On the Active Tourer the boot floor panel can come loose and its plastic flaps break.
At the viewing: Check the boot floor and test the screen and electrics.
Source: What Car?: used BMW 2 Series Active Tourer (2014-2021) reliability
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Other years
| Year | MOT tests | Most flagged |
|---|---|---|
| 2023 | 363 | Tyres 16% |
| 2022 | 4,789 | Tyres 29% |
| 2020 | 4,345 | Tyres 30% |
| 2019 | 4,410 | Tyres 30% |
| 2018 | 1,829 | Tyres 29% |
Where this comes from: the DVSA's anonymised results for every MOT test in Great Britain in 2025, counting tests of 2021 BMW 218Is registered in 2021. "Flagged" includes advisories, so it isn't the same as a fail rate. How we score