BMW 728i common MOT failures and failure rate
What a BMW 728i fails its MOT on, from real DVSA test data, and the part that resolves each item.
Based on 82 MOT tests in DVSA data.
About 23.2% of MOT tests recorded on the BMW 728i in DVSA data end in a failure. The same handful of items account for most of them.
Its most common failure is other, which makes up 5.3% of the BMW 728i's failures, followed by other, exhaust & emissions. Each item below links to the part that resolves it. Confirm the exact fitment against your registration or VIN before buying, and have safety-critical work done by a competent mechanic.
What it fails on, and why
This covers a range of smaller items, from a non-working horn to a warning light left on.
Exhaust failures cover leaks, insecure mountings and emissions over the limit. A blowing exhaust, a failed lambda reading or a diesel that smokes beyond the limit will fail.
The parts that fix each
If your car has just failed, you have 10 working days to fix the items and get a free partial retest. These are the usual parts; confirm the exact fitment against your registration or VIN before buying.
Other models
Sources: DVSA MOT History API: MOT test results and defect data ยท DVSA MOT testing data for Great Britain