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MOT test changes 2018: Everything you need to know

The MOT test is being extensively overhauled today. Jack Evans takes a look at what’s about to change and what drivers need to know

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A mechanic inspects the brakes on a Bentley car in his workshop

The MOT test is undergoing a major revision today, and brings with it tougher measures against diesel cars, as well as introducing a new way of classifying vehicle defects.

Diesel cars are being placed under close scrutiny as the government pushes to improve the country’s air quality. Because of this, if a diesel car now emits any smoke whatsoever when being MOT tested it will immediately fail.

Testers will also be closely inspecting those vehicles fitted with a Diesel Particulate Filter (DPF), to make sure that it hasn’t been tampered with or removed altogether. Some drivers do this to improve the car’s performance. However, as this system regulates the gases produced by the engine, it’s harmful to the environment if it’s taken out.

Even if the tester suspects that the DPF has been tampered with, it’s reason enough to fail the vehicle – unless the owner of the car can prove that the reason for any work on the DPF is legitimate, such as it being taken out for cleaning or regeneration.

The biggest update to the test, though, is the way faults are classified – they’ll now either be dangerous, major or minor.

Minor issues will be recorded and the owner advised to get them fixed – but the car will still pass. These faults will also be added to the MOT certificate and online recording system.

For example, a minor issue would be a problem such as oil leaking from the steering. However, this would escalate to a major if the leak was so bad as to be dripping.

AdBlue systems will be inspected as part of new checks for emissions control equipment while any leaks that pose a risk to the environment will be frowned upon.

New checks on prop shafts, rear drive shafts, the security and condition of bumpers, reversing lights, and closer inspection of the brakes than previously, will also come in.

In addition, some cars over 40 years won’t need to go through a MOT. Provided the owner can prove that the car hasn’t been radically changed in any way, then the vehicle doesn’t have to be put through the test.

The RAC has voiced concerns that the new system could lead to problems, though.

A spokesman said: “The new system creates the potential for confusion as testers will have to make a judgement as to whether faults are dangerous, major or minor.

“This will surely be open to interpretation which may lead to greater inconsistency from one test centre to another.

“Motorists may also struggle to understand the difference between dangerous and major failures. The current system ensures that any vehicle with a fault that doesn’t meet the MOT requirements is repaired appropriately before being allowed back on the road.”

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