2020 BMW 8 Series diesel: common problems and MOT failures
What MOT testers find on the diesel BMW 8 Series first registered in 2020 (diesel cars only): we looked at the 672 MOTs these cars had during 2023–2025. Plus known faults and what to look at before you buy one.
Common 2020 BMW 8 Series diesel MOT failures and advisories
The share of 2020 BMW 8 Series diesel MOT tests where testers flagged each area, as a fail or an advisory. Rough prices are typical independent-garage costs.
- Tyres22% 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.
- Brakes4% 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 electrics4% 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 seatbelts1% of testsRough price £80–£250
At the viewing: Pull each seatbelt sharply. It should lock, and retract cleanly.
Questions to ask the seller before buying a 2020 BMW 8 Series diesel
Ask before you travel to see it. A seller who knows the car will have answers, and receipts.
- Can I see the service history and receipts for any big jobs?
Looking at a BMW 8 Series?
Check the actual car: its own MOT history, mileage and what to ask the seller. Free, no sign-up.
Other years
Every year of the BMW 8 Series compared
| Year | MOT tests | Most flagged |
|---|---|---|
| 2026 | – | Too new for MOT data |
| 2025 | – | Too new for MOT data |
| 2024 | – | Too new for MOT data |
| 2023 | – | Too new for MOT data |
| 2022 | – | Too few tests |
| 2021 | 184 | Tyres 22% |
| 2019 | 2,977 | Tyres 25% |
| 2018 | 633 | Tyres 22% |
| 1999 | – | Too few tests |
| 1998 | – | Too few tests |
| 1997 | – | Too few tests |
| 1996 | – | Too few tests |
| 1995 | – | Too few tests |
| 1994 | – | Too few tests |
| 1993 | – | Too few tests |
| 1992 | – | Too few tests |
| 1991 | – | Too few tests |
Where this comes from: the DVSA's anonymised results for every MOT test done in Great Britain during 2023–2025, counting the MOTs of BMW 8 Series cars first registered in 2020. "Flagged" includes advisories, so it isn't the same as a fail rate. How we score