An MOT test checks whether your vehicle meets the minimum legal standards for road safety and environmental performance. While an MOT does not guarantee that a vehicle is mechanically perfect, it does ensure key components meet the required standards.
The good news is that many MOT failures can be avoided with a simple inspection before your test.
Use this MOT checklist to help improve your chances of passing first time.
1. Check All Lights
Faulty lights are one of the most common MOT failure reasons.
Before your test, check:
- Headlights (dip and main beam)
- Side lights
- Brake lights
- Indicators
- Hazard lights
- Number plate lights
- Rear fog lights
- Reverse lights (where fitted)
Replace any failed bulbs before your appointment.
2. Inspect Your Tyres
Tyres must meet legal requirements to pass an MOT.
Check:
- Minimum tread depth of 1.6mm across the central three-quarters of the tyre
- No cuts, bulges or exposed cords
- Correct tyre condition
- Suitable tyre sizes
A quick tyre inspection could save you from an avoidable failure.
3. Test Your Horn
Your horn must work correctly and be loud enough to warn other road users.
A non-functioning horn is an MOT failure.
4. Check Windscreen Wipers and Washers
Ensure your wipers clear the windscreen effectively and do not leave significant smearing.
Also check:
- Washer jets work correctly
- Washer bottle contains fluid
- Wiper blades are not split or damaged
5. Inspect the Windscreen
Damage within the driver's field of vision can result in an MOT failure.
As a general guide:
- Chips larger than 10mm in the driver's viewing area may fail
- Chips larger than 40mm elsewhere on the windscreen may fail
If you're unsure, have the damage assessed before the test.
6. Check Number Plates
Your number plates must:
- Be clearly visible
- Be securely attached
- Use the correct font and spacing
- Be easy to read
Dirty or damaged plates can cause unnecessary issues.
7. Ensure Seatbelts Work Properly
Check all seatbelts for:
- Secure mounting points
- Proper operation
- Damage, cuts or fraying
All seatbelts fitted to the vehicle must function correctly.
8. Check Dashboard Warning Lights
Warning lights that remain illuminated can cause an MOT failure.
Pay particular attention to:
- Engine management light
- ABS warning light
- Airbag warning light
- Brake system warning light
If any warning lights stay on after starting the vehicle, investigate the cause before the MOT.
9. Check Mirrors
Make sure all required mirrors are:
- Securely attached
- Not cracked or excessively damaged
- Providing a clear view
Damaged mirrors can lead to a failure.
10. Check Brake Performance
While you may not be able to fully inspect the braking system yourself, watch for warning signs such as:
- Squealing or grinding noises
- Vibrations when braking
- Pulling to one side
- Soft brake pedal
Any of these symptoms should be checked by a garage before the MOT.
11. Check Fluid Levels
Low fluid levels do not always cause an MOT failure, but they can indicate maintenance issues.
Check:
- Engine oil
- Coolant
- Brake fluid
- Windscreen washer fluid
Topping up fluids takes only a few minutes and helps present the vehicle in good condition.
12. Remove Obstructions
Items hanging from the rear-view mirror or obstructing the driver's view could create problems during the inspection.
Remove unnecessary items before attending the test.
Common MOT Failure Reasons
According to DVSA data, some of the most common MOT failure items include:
- Lighting and signalling defects
- Suspension issues
- Brake defects
- Tyre wear
- Driver's view of the road obstructed
- Windscreen wiper faults
Many of these can be identified during a simple pre-MOT inspection.
Can You Drive if Your MOT Has Expired?
In most cases, driving without a valid MOT is illegal.
The main exception is when driving directly to a pre-booked MOT appointment.
Always ensure your vehicle remains taxed, insured and roadworthy.
Final Thoughts
Spending 10 to 15 minutes checking your vehicle before its MOT can significantly improve your chances of passing first time.
Simple checks such as inspecting lights, tyres, wipers and warning lights can prevent unnecessary failures and save money on retest fees.
If you discover any issues, arrange repairs before the test date to avoid delays and additional costs.