Top reasons cars fail MOT tests
- ✓Tyres below legal tread depth or with sidewall damage
- ✓Lights not working correctly
- ✓Brake wear, imbalance or reduced performance
- ✓Suspension wear or broken components
- ✓Windscreen damage or poor visibility
- ✓Emissions faults and warning lights
Simple checks before the test
Check every exterior light including brake lights and indicators.
Inspect tyre tread depth and sidewall condition.
Top up washer fluid and ensure wipers clear the screen properly.
Listen for suspension knocks and feel for braking issues.
Make sure no warning lights remain on the dashboard if they affect the MOT.
Why prevention matters
A failed MOT can create extra cost, delay and stress.
Basic pre-test checks often reduce the chance of obvious failures and can save money on retesting.
Best approach
Treat the MOT as part of regular maintenance, not a surprise yearly event.
If the car already shows faults in braking, steering, visibility or warning lights, get them checked before the test date.