Kawasaki Z400b common MOT failures and failure rate
What a Kawasaki Z400b fails its MOT on, from real DVSA test data, and the part that resolves each item.
Based on 78 MOT tests in DVSA data.
About 24.4% of MOT tests recorded on the Kawasaki Z400b 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 10.5% of the Kawasaki Z400b's failures, followed by other, suspension, lamps & electrical. 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.
Suspension failures usually mean a worn or snapped coil spring, a leaking shock absorber, or play in a lower arm ball joint or bush. The tester checks for corrosion, fractures and excessive movement. A broken front spring is one of the most common failures on higher-mileage cars and is a straightforward replacement.
Lighting is the single most common MOT failure and the cheapest to put right. A blown headlight, brake-light or number-plate bulb, a cracked lens, or a headlamp beam that points too high or low will all fail. Most are a two-minute bulb swap.
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