What is checked during an MOT test?

mot test

The MOT test is an annual roadworthiness check for cars that are three years and older. Government registered inspectors scrutinise the parts of the car that focus on road safety and pollution.

Much of it isn’t rocket science and neither do you need to be a trained technician in order to check many of the procedures involved in the MOT.


There’s a more detailed blog on how to look after your tyres here. First thing to check is the tread depth. To be legal, this should be at least 1.6mm across the tyre’s tread. If the tread depth is 3mm or lower, consider replacing your tyres.

You should also look for lumps, gashes and cracks in the sidewall of the tyre. Lumps indicate that the internal structure of the tyre has failed. If your tyre has a lump in it, it won’t pass the MOT.

At the bottom of the page there are links to various films produced by tyre company Continental that help you to keep a car safe.


All the lights must be in working order. Check this by turning them on then walking around the car. Don’t forget the indicators and both main and dipped beam of the headlights. And ask someone else to help with the brake lights and reversing lights. Although cars don’t need to have fog lights, if they do have them, like other lights, they should work as intended and not have cracked lenses.


Run your finger along the wiper’s edge. It shouldn’t have nicks or rips in it. And the wiping edge of the blade shouldn’t be coming away from the body either. Check the windscreen washers too. If these are defective they are considered a major fault and will mean an MOT failure.

Glass areas

Testers will look for chips and cracks on the windscreen. How any damage is judged depends on where it is on the windscreen. There’s more information on this here.

mot test
Professionals check the car’s brakes and suspension during the MOT test


Parts of the car that are insecure or close to prescribed areas such as suspension mounting points can be deemed unsafe if they’re rotten or loose.


Of course, there are plenty of areas that testers look at that a non-pro technician can’t accurately gauge such as how the brakes work and whether there’s excessive play in the steering. Equally, without a ramp and mechanical knowledge, it’s pretty difficult to find out if suspension parts are cracked or otherwise defective.

If you have any concerns or doubts about how your car is driving, don’t hesitate to get it checked by a professional.

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