How to Improve Your Chances of Passing Your MOT First Time
An MOT test is an important part of keeping your vehicle safe and roadworthy. Once you’ve booked your MOT, it’s a good idea to have a qualified mechanic carry out a pre-MOT inspection. However, there are also several simple checks you can do yourself before test day.
These quick and easy MOT tips could help you avoid a failed test, save money on repairs, and improve your vehicle’s overall safety.
1. Check Your Tyres
Tyres are one of the most common reasons vehicles fail an MOT.
Before your test, make sure:
- Your tyre tread depth is at least 1.6mm across the central 75% of the tyre and around the entire circumference.
- Tyres are inflated to the correct pressure recommended by the manufacturer.
- There are no cuts, bulges, cracks, or other visible damage.
Although spare tyres are not included in the MOT test, it’s still important to ensure they are roadworthy and securely fitted if mounted externally.
2. Check All Mirrors
All mirrors must be secure and in good condition.
Inspect your:
- Driver’s side mirror
- Passenger side mirror
- Rear-view mirror
Any cracks, damage, or mirrors that are missing could lead to an MOT failure.
3. Test Your Horn
A working horn is a legal requirement.
Before your MOT:
- Test your horn to make sure it sounds clearly.
- If it isn’t working correctly, have it repaired before your test.
A faulty horn can result in an MOT failure.
4. Check All Lights
Vehicle lighting is a key part of the MOT inspection.
Ensure:
- Headlights work correctly on both dipped and full beam.
- Brake lights illuminate when the brake pedal is pressed.
- Indicators work properly at the front, rear, and side of the vehicle.
- All light lenses are secure and undamaged.
Remember that MOT testers will also check that your headlights are correctly aligned.
5. Investigate Dashboard Warning Lights
If warning lights remain illuminated on your dashboard, they should be checked before your MOT.
Common warning lights include:
- Engine management light
- ABS warning light
- Airbag warning light
- Brake system warning light
Don’t ignore warning lights. Have any faults diagnosed and repaired as soon as possible.
6. Test All Seatbelts
Every seatbelt fitted to the vehicle must be in good working order.
Check that:
- Seatbelts latch securely.
- They pull and retract correctly.
- There are no cuts, tears, fraying, or signs of excessive wear.
Damaged seatbelts can result in an MOT failure and pose a serious safety risk.
7. Check Your Engine Oil Level
Maintaining the correct oil level helps keep your engine running smoothly.
To check your engine oil:
- Park the vehicle on level ground.
- Allow the engine to cool.
- Remove the dipstick and wipe it clean.
- Reinsert it fully and remove it again.
- Check that the oil level sits between the minimum and maximum markers.
If a top-up is needed, use the oil grade recommended in your vehicle handbook.
8. Check Brake Fluid Levels
Brake fluid is essential for safe braking performance.
Before your MOT:
- Park on a level surface.
- Allow the engine to cool.
- Locate the brake fluid reservoir.
- Ensure the fluid level sits between the minimum and maximum markings.
The fluid should normally be clear or amber in colour. If levels are low or the fluid looks contaminated, seek advice from a qualified mechanic.
9. Inspect Your Windscreen
Your windscreen must provide a clear view of the road.
Check carefully for:
- Cracks
- Chips
- Damage in the driver’s line of sight
Even relatively small defects can cause an MOT failure if they affect visibility.
If you spot any damage, arrange a repair or replacement before your test appointment.
10. Check Windscreen Wipers and Screen Wash
Wipers play an important role in visibility and road safety.
Before your MOT:
- Test all front and rear wipers.
- Check for worn or damaged wiper blades.
- Replace blades that leave streaks or smears.
- Ensure your washer jets work correctly.
- Top up your screen wash reservoir.
These are simple checks that can help prevent an avoidable MOT failure.
Final Tip: Get an MOT Underbody Wash
Many garages recommend an MOT underbody wash before your test.
Cleaning the underside of the vehicle helps the MOT tester clearly inspect important components, particularly if the vehicle has been driven on muddy roads or treated winter roads.
It’s also important to arrive at your MOT appointment at least 10 minutes early. Drivers who arrive late may be turned away and required to book another test.
Give Yourself the Best Chance of Passing
Taking a few minutes to carry out these simple checks before your MOT can improve your chances of passing first time and help identify any potential problems before they become expensive repairs.
Regular vehicle maintenance doesn’t just help with MOTs, it helps keep you, your passengers, and other road users safe throughout the year.
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Frequently Asked Questions
- What is an MOT test?
An MOT is a roadworthiness inspection that checks whether your vehicle meets the required safety and environmental standards to be legally driven on the road.
- How can I improve my chances of passing my MOT first time?
Before your test:
- Check tyres and tyre pressures
- Test all lights
- Check mirrors and seatbelts
- Ensure washer fluid is topped up
- Replace worn wiper blades
- Address dashboard warning lights
- Check fluid levels
- Inspect your windscreen for damage
- What tyre tread depth is required for an MOT?
The legal minimum tread depth is 1.6mm across the central three-quarters of the tyre and around its entire circumference.
- Can damaged tyres cause an MOT failure?
Yes. Cuts, bulges, exposed cords, severe cracking, or other significant tyre damage may result in a failed MOT.
- What lights are checked during an MOT?
The tester will inspect:
- Headlights
- Brake lights
- Indicators
- Rear lights
- Fog lights
- Number plate lights
- Hazard warning lights
All lights must be working correctly and securely fitted.
- Can a faulty horn cause an MOT failure?
Yes. Your horn must be operational and capable of giving an adequate warning to other road users.
- Do dashboard warning lights affect an MOT?
Yes. Certain warning lights indicating faults with safety-related systems may lead to an MOT failure and should be investigated before the test.
- Which warning lights should I not ignore before an MOT?
Common examples include:
- Engine management light
- ABS warning light
- Airbag warning light
- Brake system warning light
Any active warning light should be checked by a qualified technician.
