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Last update: August 21, 2017 at 8:26 am

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Reasons why your car fails the MOT

Nearly 50% of all faults found on MOTs could be avoided by carrying out regular, simple maintenance such as replacing bulbs, windscreen wipers and tyres.

The Driver and Vehicle Standards Agency (DVSA) is encouraging drivers to avoid MOT fails and save money.

The latest MOT testing data for Great Britain shows that around 40% of cars fail their MOT at the first attempt.

Common MOT fails

You can avoid the common MOT fails by checking:

  • lightbulbs are working – 30% of all faults related to lighting and signalling
  • tyre condition and pressure – 10% of all faults related to tyres
  • mirrors, wipers and washers – 8.5% of all faults related to ‘Driver’s view of the road’

Full details of what’s in the MOT can be found on the car parts checked at the MOT page.

Test your knowledge of the MOT with this quiz

Check your lights

Check your lights

Nearly one in five (18.4%) of all cars taken for MOT had a problem with lighting and signalling – including simple problems such as blown bulbs.

Checking your lightbulbs is easy to do. You just need to give them a light tap to see if they are loose or damaged. You can also check the colours are right and match.

Replacement bulbs are fairly cheap and you can change them yourself if you have your car handbook. If not, many garages will change your bulb for free.

DVSA has published a series of short videos on YouTube about simple car maintenance – including one on how to carry out checks on lights and indicators.

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Check your tyres
 
Check your tyres

During 2014/15, 7.4% of car MOT fails were due to tyre issues.

You can use a tread depth gauge to check your tyre tread. The minimum tread for a car is 1.6mm.

You can also check that the tyres:

  • pressures are correct
  • are all the same size
  • have no cuts, bulges or other signs of damage

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Check your brakes
 
Foot on brake pedal

One in 10 (9.6%) MOT fails are due to brake issues.

You can test your brakes every day as you set off.

If you hear any strange noises, or if your car pulls to one side, contact your local garage immediately.

You can also check your brake fluid levels. Look for the high/low markings on the reservoir and make sure that your brake fluid is topped up.

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Driver’s view of the road

Drivers view of the road

6.6% of MOT fails are due to issues with the Driver’s view of the road.

You can avoid this by carrying out simple checks such as:

  • the windscreen wipers and washers work
  • your view of the road is clear of any stickers, toys or air fresheners

Windscreen wiper blades should be replaced if they show signs of damage or if they are more than a year old.

You should get your windscreen replaced if you have any large chips that affect your view, as these will result in an MOT fail.

Your rear-view mirrors must be adjustable and in good condition.

You should also make sure that you regularly top up your washer fluids and check that your washers are working properly before setting off.

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Staying safe and saving money

DVSA Interim Chief Executive, Paul Satoor, said:

You shouldn’t wait for your MOT to check if your car needs maintenance. All drivers have a responsibility to make sure their vehicle is properly maintained and safe to drive at all times.

Carrying out simple checks on items such as lights and tyres will help motorists to stay safe and legal, as well as saving time and money when their vehicle is due its MOT.

The MOT

The MOT tests your car and its parts to check that it meets the legal standards.

An MOT isn’t the same as having your car serviced and doesn’t check its general mechanical condition.

The test doesn’t cover the:

  • engine
  • clutch
  • gearbox

You can find more information about the MOT, how it works and how to get one in the getting an MOT guide.

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