Huge changes are being made to MOT rules

New MOT rules will be introduced in May 2018 making it harder for diesel cars to pass. The vehicles are to be put through tougher emissions tests and faults rated in three defect categories - Dangerous, Major and Minor. Cars with Minor defects will be allowed to pass and the faults will be recorded, but those that fall into the Dangerous category will be subject to an automatic fail.

Diesel cars will also be facing tougher rules. Any car that has been fitted with a diesel particulate filter that give out "visible smoke of any colour" during tests will get a Major fault and also automatically fail.

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