What Are the Most Common Reasons That Cars Fail Their MOT?

Every year, thousands of vehicles in the UK fail their MOT tests due to common issues that could have been avoided with a bit of preparation. Knowing what to expect during your MOT test can help you identify and fix potential problems before the test, ensuring your car remains roadworthy and safe to drive. Here are some of the most common reasons cars fail their MOT:

1. Faulty Brakes One of the most common reasons cars fail their MOT is due to issues with the braking system. This includes worn-out brake pads, poor brake performance, or leaks in the brake fluid system. Brake failure is a major safety concern, so it’s important to ensure your brakes are in good working condition before the test.

2. Worn-out Tyres Tyres are another common reason for MOT failure. The legal minimum tread depth for tyres in the UK is 1.6mm, and if your tyres are worn below this limit, your vehicle will fail the test. It’s also essential to check that your tyres are free from any damage, such as cuts or bulges, as these can also lead to a failure.

3. Lights and Indicators Non-functional lights or indicators are a major cause of MOT failures. If your headlights, brake lights, or indicators aren’t working properly, your car is deemed unsafe to drive. Before the test, check all the lights on your car, including reversing lights and fog lights, to ensure they are fully operational.

4. Emissions Problems Another reason for failure is issues with the vehicle’s exhaust system or emissions. If your car’s exhaust system is damaged or the vehicle emits harmful gases that exceed legal limits, it will fail the emissions test. Regular servicing can help keep your exhaust system in good condition and reduce the chances of this problem.

5. Suspension Issues Suspension problems are another common reason cars fail their MOT. If your car’s suspension is damaged or not functioning properly, it can affect the handling and safety of your vehicle. If you notice any unusual noises or feel a bumpy ride, it’s worth getting your suspension checked before the test.

6. Windscreen Damage As mentioned in the previous section, a cracked or damaged windscreen can result in an MOT failure, especially if the crack obstructs the driver’s line of sight. It’s important to address any chips or cracks in your windscreen before your MOT test to avoid failure.

You can always track your vehicle’s MOT status and history, including previous failures, using our MOT Check tool. This will help you identify any recurring issues and ensure your car is in top condition before the test.

Conclusion The most common reasons for MOT failure are related to safety and performance issues, including faulty brakes, worn-out tyres, lighting issues, and emissions problems. Regular vehicle maintenance and pre-test checks can help you avoid these problems and ensure a smooth MOT experience. Use the MOT Check tool to stay on top of your car’s MOT status and history.