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Mechanic shares most common cause for MOT failure – and it costs under £1 to prevent


A motoring expert from Glasgow Kelvin College has advised all drivers to make one particular check before taking their car to a garage for its MOT.

The annual inspection to see whether a vehicle is in a roadworthy condition can make drivers nervous, with many cars failing for the same reason.

Iain Ferguson, car and repair expert from Glasgow Kelvin College, recommended that drivers always spend a few moments checking that all of the lights on the vehicle are working.

He explained: “Faulty lights are a common failure during MOTs. During lighter nights, drivers often fail to properly check their lights and just assume they are all working as they should.

“Checking your lights regularly, even during those summer months, can make all the difference when your MOT comes along. Replace any bulbs that are not working with the appropriate type.”

Ahead of the MOT test, drivers should check their vehicle’s lights by switching them on individually. This includes the side lights, low and high beam headlights, indicators, rear lights brake lights and fog lights.

For some lights towards the rear of the vehicle, drivers should get a loved one to help them by pressing the brake pedal.

Drivers should also make sure that any smaller lights, such as the high-mounted third brake light or repeater indicators are in full working order.

If any lights are broken, drivers can buy replacement bulbs online or at most automotive accessory shops, with many bulbs priced at just under £1.

Ian also suggested that many vehicles fail their MOT due to issues with suspension components, helped by the worsening state of the roads.

He advised: “Suspension faults have quickly moved into second spot for common test failure. This is due mostly to the condition of the road surfaces. With so many potholes, it puts a huge increased strain on suspension components.

“You should periodically inspect your suspension system for signs of wear or damage, as well as uneven wear patterns on your tyres, which can indicate suspension issues.”

Whilst there is no simple way to check if a vehicle’s suspension will cause the car to fail its MOT, drivers should keep an eye out for a number of warning signs.

One of the most common signs that there is a suspension fault is due to uneven wear on the tyres, with one side having much less tread than the other.

Drivers should also take the car for a spin ahead of the test, listening out for any unusual noises and noting if the ride is harsher or bouncier than expected.

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