1998 BMW 840: common problems and what to check
What gets flagged at MOT on 1998 BMW 840s, from 123 tests in 2025, plus known faults and what to look at before you buy one.
Small sample: only 123 of these were MOT tested in 2025, so treat the percentages as rough. The known faults below don't depend on it.
What gets flagged at MOT
The share of 1998 BMW 840 MOT tests where testers flagged each area, as a fail or an advisory. Rough prices are typical independent-garage costs.
- Suspension26% 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.
- Brakes21% 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.
- Oil and fluid leaks18% of testsRough price £80–£600
At the viewing: Look under the engine and on the ground where the car is usually parked for fresh oil or fluid.
- Lights and electrics17% of testsRough price £10–£80
At the viewing: Ask a friend to check every light, including brake lights and indicators, while you operate them.
- Rust and bodywork14% of testsRough price £150–£1,000
At the viewing: Check the sills, wheel arches and underneath for rust, and look along the panels for uneven gaps or paint.
- Tyres12% 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.
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Other years
| Year | MOT tests | Most flagged |
|---|---|---|
| 1999 | 117 | Suspension 27% |
| 1997 | 168 | Suspension 32% |
| 1995 | 105 | Suspension 30% |
Where this comes from: the DVSA's anonymised results for every MOT test in Great Britain in 2025, counting tests of 1998 BMW 840s registered in 1998. "Flagged" includes advisories, so it isn't the same as a fail rate. How we score