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MOT Test Checklist 2026: Most Common Fails and How to Avoid Them
Dealers Portal UK Editorial
Nearly 40% of first-time MOT fails in the UK are caused by trivial issues you can fix at home in 15 minutes: (1) Blown lighting bulbs (28% of fails), (2) Tyre tread depth below 1.6mm or cuts (12% of fails), (3) Empty screenwash reservoir (automatic fail), (4) Split wiper blades, and (5) Dashboard warning lights (ABS, airbag, or engine management lights permanently illuminated).
An MOT test is mandatory for all UK vehicles over 3 years old. Failing an MOT causes unnecessary re-test fees, garage delays, and risks driving illegally on UK roads.
| Component | What to Inspect | Pass Requirement |
|---|---|---|
| Lamps & Indicators | Headlights, brake lights, reverse, number plate bulbs | All bulbs working; clean lenses without cracks |
| Tyres & Wheels | Tread depth using a 20p coin across central 3/4 | >1.6mm legal minimum; zero sidewall bulges or cords |
| Windscreen & Wipers | Wiper clearing action & chips in swept area | No tears in rubber; chips <10mm in line of vision |
| Washer Fluid & Horn | Press washer button and sound horn | Fluid jets cover screen; horn sounds a clear single tone |
| Seatbelts & Airbags | Pull belts firmly to test inertia locking reels | Belts retract cleanly without fraying; airbag light off |
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Published and fact-checked in accordance with 2026 DVLA, DVSA MOT guidelines, and UK automotive marketplace standards.
Aug 20, 2026
