Here’s a breakdown of the top reasons cars fail their MOT and what you can do to avoid them.
1. Faulty Lights and Signals
Lights account for a significant portion of MOT failures. This includes headlights, brake lights, indicators, and number plate lights.
How to Avoid It:
- Check all external and internal lights regularly.
- Replace any blown bulbs immediately.
- Clean your light covers to ensure they’re not dimmed by dirt or grime.
2. Worn Tires
Tires are crucial for safety and are inspected for tread depth, condition, and pressure.
How to Avoid It:
- Ensure the tread depth is at least 1.6mm across the central three-quarters of the tire.
- Check for cuts, bulges, or objects stuck in the tread.
- Inflate tires to the manufacturer’s recommended pressure.
3. Brake Issues
Brakes are a critical safety component, and any faults can result in an MOT failure.
How to Avoid It:
- Listen for squealing or grinding noises, which could indicate worn brake pads.
- Test the handbrake to ensure it holds the car securely.
- Have your brakes checked by a professional if you suspect any issues.
4. Obstructed Driver’s View
A clear windscreen is essential for safe driving. Issues like cracks, chips, or faulty wipers can lead to a failure.
How to Avoid It:
- Fix any windscreen chips or cracks larger than 10mm in the driver’s line of sight.
- Replace worn or damaged wiper blades.
- Ensure your washer fluid is topped up.
5. Registration Plate Problems
Registration plates must be clean, securely fastened, and conform to legal standards.
How to Avoid It:
- Clean your number plates regularly.
- Check that the plates are securely fixed and not cracked or damaged.
- Ensure the font and spacing comply with UK regulations.
6. Suspension Faults
Suspension issues, such as worn shock absorbers or broken springs, are common causes of MOT failures.
How to Avoid It:
- Look for unusual noises or excessive bouncing when driving over bumps.
- Have a professional inspect your suspension during routine servicing.
7. Exhaust and Emissions
Vehicles must meet emissions standards to pass an MOT. Excessive exhaust smoke or a noisy exhaust system can result in failure.
How to Avoid It:
- Check for unusual noises or excessive smoke from the exhaust.
- Service your vehicle regularly to maintain optimal engine performance.
8. Steering Issues
Faulty steering components or excessive play in the steering wheel can lead to a failure.
How to Avoid It:
- Test your steering for responsiveness and unusual noises.
- Address any steering concerns during regular maintenance.
How an MOT Checker Can Help
An MOT Checker is a valuable tool for staying prepared:
- Track your vehicle’s MOT due date.
- Review your MOT history to identify recurring issues.
- Plan repairs well in advance of your test.
By staying informed, you can minimize the risk of surprises during your MOT.
Final Thoughts
Most MOT failures are due to common, preventable issues. Regular maintenance, timely repairs, and pre-test checks can significantly increase your chances of passing on the first attempt.