The MOT (Ministry of Transport) test is a compulsory test for vehicles which ensures that they meet the minimum safety and environmental standards. Driving without an MOT (unless you are driving to the test centre) is illegal, and your mechanic will do what is needed to make sure that your vehicle passes. However, understanding the most common reasons for MOT failure can help you better prepare your vehicle for its MOT test and avoid these problems.
Lighting and signalling issues
A top reason for MOT failure is faulty lighting and signalling systems including faulty bulbs, incorrect headlight alignment, and non-functioning indicators or brake lights. Even a minor issue, like a blown bulb, can result in a test failure. Regularly checking that all lights are working and replacing any defective bulbs can prevent this common issue.
Suspension faults
The suspension system is another of the most common reasons for MOT failures. Suspension faults often arise from wear and tear, particularly in older vehicles. Issues such as worn-out shock absorbers, broken springs, or damaged suspension components can lead to a failure. These problems can not only affect the vehicle's performance but also pose a safety risk, making it essential to have them inspected and repaired before the MOT test.
Brake system deficiencies
Brakes are another central aspect of vehicle safety which can result in an MOT failure. Common brake-related issues include worn brake pads, discs, or drums, as well as problems with the brake fluid or hydraulic system. Uneven brake force distribution, which can cause the car to pull to one side when braking, is also a common issue. Regular maintenance and timely replacement of brake components can help avoid such failures.
Tyre condition
Your tyre condition will dictate the contact that your car has with the road, and their condition is closely scrutinized during the MOT test. Worn-out tyres, those with insufficient tread depth (below the legal limit of 1.6mm), or tyres with visible damage like cuts or bulges are frequent causes of failure. Ensuring that tyres are in good condition and meet the required standards before the test is crucial to avoid this common pitfall.
Exhaust and Emissions
Exhaust and emissions-related failures are increasingly common. Vehicles that emit excess smoke or have malfunctioning exhaust systems, such as a damaged catalytic converter or a leaking exhaust pipe, are likely to fail. Regular servicing and addressing any warning lights related to emissions can help prevent this issue.
By keeping an eye on the basics you can make your MOT test go more smoothly while saving money. If your MOT test is up for renewal, book it now via our directory of rated MOT test centres near you. Want more advice? Follow Trust A Garage on Facebook or X.