Top 10 Mistakes to Avoid on the MOT Class 7 Test

MOT Class 7 Test

The MOT Class 7 test, which is intended for larger cars like cargo trucks and passenger buses, is a key evaluation of a car’s roadworthiness as well as security adherence. It’s imperative to be aware of typical blunders which may result in failure if you want to pass the MOT Class 7 test. In order to assist you pass the MOT Class 7 test, we’ll go over the top 10 errors you should never make in this tutorial.

1. Insufficient Lighting:

Poor illumination, comprising problems with the headlights, brake lights, indicators, & taillights, represents one of the most frequent causes of MOT test failure. Make sure that all of the lights are on, the right colour, and positioned properly.

2. Brake Issues:

Test failure may be caused by brake problems. Check the condition of your brakes, such as the braking discs, pads, and fluid levels. Any strange sensations, noises, or brake performance issues should be addressed right away.

3. Poor Tyre Performance:

MOT failure may be cause by improper tyre circumstances, such as inadequate tread depth, fractures, bulges or uneven wear. Periodically inspect your tyres and substitute them if they show signs of wear or damage.

4. Steering And Suspension Issues:

Failures often result from faulty steering or suspension systems. Make that the steering is accurate and flexible, and that the suspension components are in excellent shape.

5. Airbag And Seatbelt Defects:

Make that the retraction & locking mechanisms on seatbelts are working properly. Look for any indicators lights or other problems with the airbag system, & fix them right away.

6. Emissions From Exhaust:

MOT failures due to emissions regulations violations are frequent. To maintain emissions under acceptable ranges, service your car frequently, and take care of any motor or exhaust problems as soon as they arise.

7. Problems With The Fuel And Exhaust Systems

Failure may result from cracked exhausts or leaking fuel systems. Make sure the exhaust system is unaffected by excessive rust or damage and look for leaks.

8. Electrical Systems With Faults:

Failure may cause by electrical faults, which may also affect the airbags, ABS structures, or dashboard warning lights. Check to make sure all electrical systems are operating properly.

9. Windscreen And Wiper Defects:

Failure may result from windscreen cracks or chips, bad wipers, or both. Wiper blades and cracked windscreens should be replaced as needed.

10. Insufficient Documentation:

Make sure you have all the required paperwork, such as the V5C logbook & the service history, for the car. You might not be able to pass the exam if you don’t have the required documentation.

MOT Class 7 Test

Bonus Mistakes To Avoid

Forgetting To Perform Regular Maintenance:

Neglecting normal car maintenance constitutes one of the worst errors. Regular maintenance and inspections may assist find and fix possible problems before they cause a test to fail.

Ignoring Warning Lights:

Dashboard warning lights serve as early warning systems for possible problems. Neglecting them could result in test failure. As soon as a warning light appears, take care of it while having a professional mechanic check the car.

Using Non-Compliant Parts:

Employing aftermarket or non-compliant parts which don’t adhere to safety and emissions regulations may result in MOT failure. Whenever making repairs or substitutes, only use parts that have been authorised and verified.

Ignoring Fluid Levels:

Test failure might be caused by low or contaminated fluid levels in the car, such as brake fluid, coolant, or oil. Monitor and keep up fluid levels frequently to make certain they are within the advised ranges.

Excessive Rust And Corrosion:

On structural parts, severe rust and corrosion might cause collapse. To safeguard your car, take immediate action to tackle rust problems and think about rust preventive techniques.

Missing Or Damaged Mirrors:

Check to make sure that all of the vehicle’s mirrors are visible, unhindered, and unharmed. Mirrors that are broken or missing might cause problems.

Faulty Horns:

A horn that is ineffective or non-functional may lead to failure. To make sure the horn is operating properly, test it frequently.

Non-Compliant Number Plates:

Number plates must adhere to strict guidelines regarding size, font, and spacing. Failure could result from using number plates that aren’t legal. Make sure the regulations for your licence plates are follow.

Improperly Functioning Or Incomplete Exhaust Systems:

Exhaust systems must be functional and entire. Failure may result from an exhaust piece that is missing or damaged.

Defective Hazard Warning Lights:

Safety depends on effective hazard warning lights. Verify that they are all operating properly and flashing at the same time.


To pass the MOT Class 7 test and ensure the safety and highway safety of the car you drive, eliminating these typical mistakes is crucial. You can prevent possible issues from leading to test failure by performing routine maintenance, quick fixes, and paying close attention to detail. Always seek the advice and competent examination of a licenced technician or a MOT testing facility.

Also, read this: How to Choose the Right Exhaust System for Your Car?

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