Top 10 Common MOT Failures and How to Avoid Them

An MOT (Ministry of Transport) test is a vital check-up for your vehicle, ensuring it meets the necessary safety and environmental standards. Failing an MOT can be frustrating, time-consuming, and costly. However, many MOT failures are preventable with proper maintenance and attention to detail. In this blog, we’ll cover the top 10 common MOT failures and offer tips on how to avoid them, helping you pass your test with ease.

1. Worn Tyres

Worn or damaged tyres are one of the most common reasons for MOT failure. The legal minimum tread depth is 1.6mm across the central three-quarters of the tyre. Anything less can result in an automatic failure.

How to avoid it: Regularly check your tyre tread and pressure. If the tread is close to the minimum limit, replace the tyres well in advance of your MOT.

2. Faulty Lights and Indicators

Broken or faulty lights, including headlights, brake lights, and indicators, can cause an MOT failure. This is an easy mistake to overlook, especially with bulbs burning out gradually.

How to avoid it: Regularly inspect all lights and bulbs, including fog lights, reverse lights, and number plate lights. Replace any blown bulbs promptly.

3. Emissions Issues

Excessive exhaust emissions, particularly from older vehicles, can result in a failed MOT. A vehicle's exhaust system needs to meet strict environmental standards, and if it doesn’t, it will fail the test.

How to avoid it: Ensure your car undergoes regular servicing, particularly the exhaust and emission systems. If your car is due for a catalytic converter replacement, get it done ahead of the test.

4. Worn Brake Pads or Discs

Worn or damaged brake pads and discs are serious safety issues and one of the leading causes of MOT failures. If the braking system is not functioning properly, your vehicle will fail the test.

How to avoid it: Check your brakes regularly for wear and tear. If you notice any squealing or reduced braking performance, have them inspected and replaced by a professional.

5. Suspension Problems

Faults with the suspension system, such as worn shock absorbers or broken springs, can cause an MOT failure. A damaged suspension system can affect the handling and stability of your vehicle, making it unsafe to drive.

How to avoid it: If your car feels bumpy or handles poorly, have the suspension checked. Regular servicing can help spot early signs of damage.

6. Windshield Wipers and Washers Not Working

Inoperative or ineffective windscreen wipers and washers can result in an MOT failure. These are vital for visibility during adverse weather conditions.

How to avoid it: Regularly check your wipers for wear and replace them if necessary. Ensure that the washer fluid reservoir is full and the sprayers are functioning.

7. Excessive Underbody Rust

Excessive rust or corrosion on the underbody of your vehicle can lead to an MOT failure. The test checks for structural integrity and significant rust can compromise the strength of your car’s frame.

How to avoid it: Check for signs of rust, particularly in areas like the wheel arches and chassis. Keep your car clean and dry, especially during winter, to prevent rust build-up.

8. Steering System Issues

Any play or issue in the steering system can result in a failed MOT. A worn-out steering rack or loose steering components can affect vehicle handling and are dangerous.

How to avoid it: If your steering feels loose or you hear unusual noises when turning, have it checked immediately. Regular maintenance can help identify problems early.

9. Broken or Loose Number Plates

A broken or missing number plate, or one that is not clearly visible, can result in an MOT failure. It is also an offence to have a dirty or obscured number plate.

How to avoid it: Ensure your number plates are secure, clean, and legible. Replace any damaged or cracked plates before your test.

10. Seat Belts and Airbags Not Functioning

Faulty seat belts or airbags that do not function correctly can lead to a failed MOT. These are critical safety features, and if they are defective, your vehicle cannot pass the test.

How to avoid it: Check that all seat belts retract smoothly and are free from damage. If your airbag light comes on, have the system checked before your MOT.

Conclusion

An MOT is a vital part of keeping your vehicle safe and roadworthy. While it’s easy to overlook small issues, many common MOT failures can be avoided with regular maintenance and checks. By addressing issues such as tyre wear, faulty lights, and brake problems before your test, you’ll increase your chances of passing and avoid costly repairs. Regular servicing and attention to your vehicle's condition will help ensure a smoother MOT experience and keep your car in top shape all year round.

Remember, taking proactive steps to maintain your car not only helps you pass the MOT but also ensures your safety and the safety of others on the road.