Every year, millions of UK vehicles go through the MOT test. Yet nearly 40% fail on their first attempt, often for simple, avoidable issues. This comprehensive guide will help you prepare your vehicle and pass with confidence.
What is an MOT?
The MOT (Ministry of Transport) test is an annual inspection required for vehicles over three years old in the UK. It checks that your vehicle meets road safety and environmental standards. Driving without a valid MOT can result in fines of up to £1,000.
Pre-MOT Checklist
Before taking your vehicle to the garage, run through these checks yourself:
1. Lights and Indicators
Check all external lights: headlights (main and dipped beam), brake lights, indicators, fog lights, reversing lights, and number plate lights. This is one of the most common failure points, and it's often just a blown bulb that costs pennies to replace.
2. Tyres
The legal minimum tread depth is 1.6mm across the central three-quarters of the tyre. Check all four tyres plus the spare. Look for cuts, bulges, or uneven wear. Also check that tyre pressures are correct, underinflated tyres can affect handling and fuel economy.
3. Windscreen and Wipers
Your windscreen must be free from significant chips or cracks, especially in the driver's line of vision. Wiper blades should clear the screen effectively without smearing. Top up your washer fluid, an empty washer bottle is an instant fail.
4. Brakes
While a full brake inspection requires specialist equipment, you can check for warning signs: unusual noises, the car pulling to one side, or a spongy brake pedal. Make sure the handbrake holds the car on a slope.
5. Exhaust and Emissions
Excessive smoke from the exhaust is a fail. If your engine warning light is on, get it checked before the MOT as it often relates to emissions. A faulty catalytic converter is an expensive repair but common failure point.
6. Mirrors and Glass
All mirrors must be present, securely attached, and provide a clear view behind. Side windows must open and close properly. Tinted windows must allow at least 70% light transmission on front windows.
7. Seatbelts
Check that all seatbelts extend, retract, and lock properly. Look for fraying or damage to the webbing. All seatbelt mounting points should be secure.
8. Horn
Your horn must produce a continuous, uniform sound. It's a simple check but worth doing.
Common MOT Failure Points
According to DVSA data, the most common reasons for MOT failure are:
- Lighting and signalling (30% of failures)
- Suspension (13%)
- Brakes (10%)
- Tyres (9%)
- Driver's view of the road (8%)
- Exhaust, fuel, and emissions (7%)
How Revn Helps
With Revn, you'll never forget your MOT date. We send you reminders weeks in advance, giving you time to prepare your vehicle and book with a local garage. Our app even helps you find the best-rated MOT centres near you.
Book Smart, Save Money
Many garages offer reduced MOT prices when booked in advance or combined with a service. Use Revn to compare prices and find the best deals in your area. Some of our users save up to £50 per MOT by booking through our partner garages.
Final Tips
- Book your MOT before it expires, you can have it done up to 30 days early without losing any time on your certificate.
- Clean your car before the test, a dirty vehicle can hide problems and annoy the tester.
- Remove any personal items from the boot to allow easy access to the spare wheel and jack.
- If your car fails, you have 10 working days to get a free partial retest at the same centre.