Mercedes-Benz B-Class common MOT failures and failure rate
What a Mercedes-Benz B-Class fails its MOT on most often, from real DVSA test data, and the part that resolves each item.
Based on 11,339 MOT tests in a recent DVSA sample.
What it fails on, and the fix
About 19.7% of MOT tests recorded on the Mercedes-Benz B-Class in this DVSA sample end in a failure. The pattern is consistent: the same handful of items account for most of them.
Its most common failure is suspension, which makes up 26.1% of the Mercedes-Benz B-Class's failures, followed by suspension, tyres, lamps & electrical, brakes. 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.
Other models
Sources: DVSA MOT History API: MOT test results and defect data ยท DVSA MOT testing data for Great Britain