If you own a large vehicle that weighs between 4,000 kg and 4,500 kg, you will need a Class 7 MOT every year. Now, ask why? This test helps ensure the safety of your vehicle while driving on the road. Some vehicle owners worry about their MOT because if the test fails, then they may have to pay unexpected repair bills. Simple checks can help you avoid failures.
In this blog, we have drafted the top reasons why large vehicles fail Class 7 MOT in Bristol. Moreover, we have guided you on how to prevent the failure.
What are the Reasons to Fail a Class 7 MOT?
There are multiple reasons for MOT failure. However, you can avoid them if you follow the guidelines. So, check them out!
- Tyre Issues
Tyres are essential because they maintain the basic safety of your vehicle. During an MOT test, the examiners check the following:
- Condition of the tyre: There should not be any cracks, bulges, or cuts.
- Tread depth: The depth of the tyre should be a minimum of 1.6 mm, with three-quarters of the tyre
- The tyre pressure should be adjusted according to the vehicle's pressure.
How to avoid it?
You should check your tyres regularly with a tread depth gauge. If your tyres are damaged, you should replace them before the Class 7 MOT test. Also, do not forget to check the spare tyre of your vehicle if you are carrying it with you.
- Broken and Faulty Lights
A lighting problem in your vehicle is a common reason for MOT test failure. The test includes:
- Brake lights are not turning on
- The indicator bulb is blown
- Malfunction in the headlights
- The number plate light is not working
How to avoid the problem?
Before you do an MOT test, check the necessary parts of the vehicle, so that you don't miss anything. You may ask your family member or a friend to check the indicator when you press the brake. You may replace your bulb and save from an automotive failure.
- Number Plates and Visibility
It may seem a simple problem, but vehicles fail MOT tests if the number plate is broken, missing or too dirty to read.
How to avoid the issue?
You should keep the number plates clean before the test. They should be correctly spaced, well-lit at night and visible.
- Brake Problems
The faulty brake is a serious safety concern that can cause an MOT failure. The issues include:
- Not holding the handbrake properly
- Worn discs or brake pads
- Leakage in the brake system
How to avoid the problem?
If you notice the unnecessary grinding and squealing noises, you should check your brakes. An expert can test the condition and replace your brakes and other parts before MOT.
- Exhaust and Emission
For large vehicles like a diesel van, emissions are a crucial aspect of the MOT test. The fundamental problems are:
- Failing the emission limits
- Exhausts leak
- Smoke is coming out of the exhaust
How to avoid it?
If you notice excessive smoke and loud noise from the exhaust, ask a mechanic to inspect it. The regular servicing keeps your vehicle's emissions low. You should use the correct fuel and tune up the engine.
- Wipers and Windscreen
Your view while driving should be clear. If it is not clear, you cannot pass the MOT test in Bristol or anywhere else in the UK. You may fail the test due to the common problems:
- Washers of the windscreen don't spray properly
- There are large chips or cracks on the windscreen
- Wiper blades are damaged
How to avoid the problem?
Check your windscreen before MOT. You can repair the small chips at a low cost. The washer bottle should be topped up with the screenwash. You should replace the old wiper blades before the MOT test.
- Suspension Problem
Suspension maintains the stability of every vehicle. A driver can comfortably drive the car. The failures occur due to the following reasons:
- Broken springs
- Worn shock absorbers
- Loose suspension parts
How to avoid it?
If your vehicle feels unstable, bouncy, and makes knocking noises, it's time to inspect. The suspension repairs can be costly, but fixing them early can prevent damage in future. You may pass the MOT if you bear the expense.
- Seatbelt
The safety features in the vehicle should be checked properly. The MOT failures may be due to the common problems, such as:
- Missing seatbelts on the seats
- Warning lights of the airbag
- If the seatbelts don't get locked properly
How to avoid the issues?
You should test the seatbelts to ensure the clips are securely locked. If you detect warning lights on the dashboard, then you should seek the help of an expert mechanic.
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