Introduction
With stricter DVSA guidelines rolling into 2025, MOT test failure rates are expected to rise. Whether you’re a seasoned driver or a first-time car owner, passing your MOT is crucial to staying on the road legally. In this article, we’ll walk you through the top 10 most important MOT check tips — all practical, actionable, and focused on helping you avoid the most common reasons for MOT failure.
1. Check All Car Lights
One of the most common reasons cars fail MOT tests is faulty lights. That includes your:
- Headlights
- Brake lights
- Indicators
- Number plate lights
Tip: Walk around your car and test all lights. Replace bulbs as needed — they’re cheap but essential!
2. Inspect Tyres for Wear
Tyres must have a minimum tread depth of 1.6mm. Bald or unevenly worn tyres are a guaranteed MOT fail.
Use a 20p coin test: If the coin’s outer band is visible, it’s time for a change.
3. Clean Your Number Plates
If your number plate isn’t readable or is cracked, dirty, or incorrectly spaced — it’s an instant MOT failure.
Make sure it:
- Is clean
- Matches DVLA format
- Is well-lit at night
4. Windscreen & Wipers
Cracks or chips larger than 10mm in the driver’s line of sight will fail the test. Also, worn-out wipers that leave streaks can cause failure.
5. Check Brakes & Handbrake
Listen for grinding noises. Test brake responsiveness in a safe location.
Handbrake should hold the car on a slope — if not, it needs adjustment.
6. Keep Your Car Clean
Yes — even cleanliness matters! A cluttered car can prevent inspectors from accessing seatbelts or dashboards.
Dirty or unkempt interiors have been flagged for MOT refusal.
7. Top Up Fluids
Make sure the following are filled before test day:
- Screen wash
- Engine oil
- Coolant
- Brake fluid
Running low may not directly fail the MOT, but it reflects poor maintenance and could cause mechanical issues.
8. Warning Lights on Dashboard
If your engine warning light is on, your car could fail the MOT.
Get it diagnosed and fixed beforehand. Most garages offer a pre-MOT check service for under £30.
9. Seat Belts & Horn
All seat belts must:
- Lock properly
- Retract smoothly
- Not be frayed
Also test the horn — a faulty horn = MOT failure.
10. MOT History & Due Date
Before heading to a test centre, check your MOT due date online to avoid late penalties. You can use our free MOT Check Tool by entering your registration number.
Bonus Tip: Book an MOT Test Early
Don’t wait until the last day. You can get your car tested up to a month before your MOT expiry date and still keep the original date.
Conclusion
MOT failures are often caused by small, avoidable issues. With these 10 simple checks, you’ll dramatically increase your chances of passing on the first try. Don’t leave it to chance — stay road legal and safe with regular vehicle care.
🔧 Use our MOT Check Tool now to find out your car’s current MOT status instantly.