New MOT failure rules coming in May - and it'll be harder for diesels to pass
New MOT failure rules coming in May - and it'll be harder for diesels to pass NEW MOT rules will make it harder for dirty diesels to pass - and introduce new failure ratings. From May 2018 a diesel loophole will be closed and cars will be given defects in three new categories to reveal how dangerous it really is. MOT gets new failure ratings - and tougher diesel tests Testers will grade problems as dangerous, major or minor - and you'll be warned of the fines you face for not getting faults fixed. Dangerous and major defects will lead to an automatic fail but a car with j...