What is checked in an MOT?

MOT tests are usually pretty quick in comparison to most work completed by garages and usually takes about 30 minutes to an hour per test. MOT's are conducted annually to ensure the roadworthiness of your vehicle. During an MOT check, the following list of items will be examined:

Brakes

Brakes

To pass the MOT test, the breaks, pedals and levers need to be in good, working condition and any corresponding lights must also be working. The mechanic will also test the performance of the breaks to see how efficient they are.

The anti-lock braking system (ABS) and electronic stability control (ESC) will also be checked if applicable.

Note: Any inappropriate repairs or modifications will be checked and could result in a failed MOT.

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Vehicle body & Structure

Vehicle body & Structure

This entails an inspection of the:

  • Bonnet and boot/tailgate
  • Chassis
  • Doors
  • Engine mountings
  • Seats

The mechanic will be looking at general items to make sure that all main parts do not have any damage, excessive corrosion or sharp edges that have the potential to hurt someone, such as a pedestrian or another motorist.

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Vehicle Identification

Vehicle Identification

Your number plates must be fitted to both the front and back of the vehicle and will be inspected to ensure they are securely fitted and clear to read (from up to 20 metres distance from the vehicle). The letters and numbers must also be correctly spaced and formed.

Your vehicle's VIN (Vehicle Identification Number), which must be clearly displayed (on the VIN plate or chassis) will also be checked.

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Emissions, exhaust and fuel system

Emissions, exhaust and fuel system

As per your car's age and the type of fuel it runs on, the tester will check that the vehicle adheres to the exhaust emissions rules and regulations - i.e. the level of carbon monoxide and hydrocarbon emissions falls within the legal limit.

To carry out an emissions test, there should be a sufficient amount of engine oil and fuel level. The mechanic will test this while the engine is running with a gas analyser probe and also visually for signs of any smoke. Excessive smoke will likely cause a failed MOT test.

The tester will also check the exhaust system to ensure it is securely fitted and is not leaking anywhere or making any strange noises. It's important to note that if your vehicle had a catalytic converter when you purchased it, it must still be attached.

The fuel system will also be checked for any leakage, and the mechanic will look at the pipes and hoses to make sure they are all in good condition. The fuel cap must also close securely without any problems.

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Seats, seatbelts and doors

Seats, seatbelts and doors

When checking your vehicle's seats, the tester must be able to adjust the driver's seat easily, see that all seats are fitted securely and that the backs of the seats can be positioned upright.

All seat belts must be securely attached in the correct places, in good condition and work correctly.

Airbags, seatbelt pre-tensioners and load limiters will also be looked at.

All of the doors on your vehicle must easily open both from the inside and outside, the door lock must securely latch when closed and any hinges are securely fitted and in good condition.

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Mirrors, windscreen and wipers

Mirrors, windscreen and wipers

The MOT tester will ensure that all mirrors are where they should be (rearview and wing mirrors) and in good condition.

The windscreen must not be damaged in a way that could obstruct the driver's view.

Windscreen wipers and washers must also work correctly to cover a wide enough area so that the driver can clearly see the road in adverse weather.

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Tyres and wheels

Tyres and wheels

During the MOT test, your tyres will be examined to check their condition, security, size, type and tread depth (spares won't be checked).

The tread depth of all tyres must be at least 1.6mm and the tyres will be checked to ensure that there are no cuts deeper than 25mm, lumps, bulges and rips.

The wheels will also be looked at to make sure they are in good condition, with all nuts securely fitted in the appropriate places.

Note: Any vehicle that was first driven on or after January 1st 2012 will be inspected to ensure that the TPMS (tyre pressure monitoring system) is working.

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Lights

Lights

It's a good idea to have a partner, family member or friend walk around your car while you operate the lights to check they are all working as they should - do this now and again, as well as before your MOT test.

Your vehicle's front, back, fob, indicator and registration number plate lights will be checked to ensure they are all:

  • Working via the appropriate switches
  • In good condition
  • Secure
  • Correctly positioned
  • Not being obscured
  • Showing the correct colours
  • Unaffected by other lights

In addition to the above, the mechanic will also check the headlamp aim (dip beam and main beam) and that the main beam light is working.

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Horn

Horn

Your vehicle's horn will be checked to make sure that it works (sound continuously in one note) and is loud enough to be heard by other drivers and pedestrians.

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Battery and electrical wiring

Battery and electrical wiring

The battery will be looked at, ensuring that it is securely fitted and is not leaking any electrolytes. Additionally, any electrical wiring will be checked to make sure it is all secure and is not damaged in a way that could cause it to stop working or detach itself.

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Towbars

Towbars

Your vehicle's tow bar must be secure and in good condition. The person carrying out the MOT test will make sure that it hasn't been inappropriately repaired or modified, the 13-pin electrical socket is in working order and any engine mountings must also be securely fitted.

If there is an electrical socket, this will be checked to make sure it is in good condition and that it operates the trailer's parking, brake, indicator and fog lights correctly.

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Steering and Suspension

Steering and Suspension

Both the steering and suspension of your vehicle will be inspected to make sure they're in good condition and work exactly how they should (including the steering lock mechanism, which must only lock when the engine is off).

The steering oil level (steering fluid) will be checked, and the tester will be looking out for any unsuitable modifications or repairs as well as any corrosion on the power steering pipes/hoses.

Regarding your vehicle's suspension, the components and shock absorbers will be checked to make sure there aren't any signs of excessive corrosion, distortion or fractures.

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