
What Does a Major MOT Defect Mean?
A major MOT defect means the vehicle has failed because the tester found a problem that could affect safety, the environment or compliance. Here is what the result means and what to do next.
Ashton's Garage
Straightforward guidance on MOTs, servicing, warning lights, repairs and looking after your car.

A major MOT defect means the vehicle has failed because the tester found a problem that could affect safety, the environment or compliance. Here is what the result means and what to do next.

A dangerous MOT defect means the vehicle has failed because the issue poses a direct and immediate road-safety risk or affects the environment. Here’s what to do next.

A failed number plate light can affect your MOT result. Find out what the light does, what you can check safely and when a garage should investigate the fault.

A noisy exhaust can lead to an MOT failure, but the outcome depends on why it is noisy and whether the exhaust is secure, leaking or affecting emissions. Here is what to check before your test.

A cracked windscreen does not automatically mean an MOT failure. The result depends on the crack’s size, position and effect on the driver’s view, as well as whether other windscreen defects are present.

Yes, worn, damaged or contaminated brake pads can contribute to an MOT failure. Find out what testers look for, what an advisory means and when your brakes need professional attention.

Worn, damaged or incorrectly fitted tyres can lead to an MOT failure. Learn what the tester checks, what an advisory means and when your car should be inspected before driving.

A dashboard warning light does not automatically mean an MOT failure. Find out which warning lights may be checked during the MOT, what an illuminated light could mean and when professional advice is sensible.

Find out why cars commonly fail their MOT, what you can check safely beforehand and when a garage should investigate the problem.

Find out what paperwork is usually needed for an MOT, when a V5C or other evidence may matter, and what to check before taking your car to the test.

Wondering how long an MOT takes? Here is what normally happens, why the timing can vary and how to plan your visit without unnecessary waiting.

An MOT checks key parts of your car against UK road safety and environmental standards. Here is what the tester looks at, and what the test does not cover.