In March’s blog we went over some of the MOT changes that had been published by the DVSA. It has about two months since the changes have come into action and there are articles being posted about how car owner’s are being pressured by certain garages into getting the work done and confusion over what the new system means for them and their vehicles. With what we have learned over the last two months, hopefully by the end of this blog, you’ll understand and have some peace of mind when it comes time for the MOT on your vehicle. We’ll go through each point that has been asked frequently by customers over the last two months.

‘Dangerous to Drive’ – This is not new. This has always been part of the MOT, except before it was optional for an MOT Tester to select a fault would make a vehicle too dangerous to drive. An example would be Brake Pads being too low. The legal limit on Brake Pads is 1.5mm. A car fails its MOT if the MOT Tester believes that the Brake Pads are 1.5mm or below. Now even at 1.5mm, there should be adequate Brake Pad material to stop the vehicle, not efficiently, but it should. If the tester can see that the Brake Pad has gone pass this point and is now scoring into the surface of the Brake Disc, then on the old MOT system they could press the dangerous button which would put ‘*DANGEROUS*‘ at the end of the failure. The DVSA felt that car owner’s were unaware how serious the ‘*DANGEROUS*‘ or failures were in general. Hence why, they have now recategorise the failure system in the hope that it would make car owner’s aware of how serious certain failures can be to the safety of the driver and passengers.

‘Can I drive my vehicle away as it’s been deemed ‘Dangerous to Drive’?‘ – From the point of view of us as MOT testers, no you should not be driving your vehicle away from the MOT centre as it has been deemed unroadworthy. But, we cannot stop you from driving your vehicle away from the MOT centre. The only thing for car owner’s to bear in mind is that it is an offence to drive a vehicle with no MOT and it does forfeit your Insurance and Tax. There has been no notice that the old rules of being allowed to drive your failed vehicle from the MOT centre to your home has been axed. It has always been that as long as the MOT centre has you booked in for an MOT with the car registration, you were allowed to drive an insured vehicle from your home to an MOT centre, have an MOT performed on your vehicle and then drive either the failed vehicle home or to a post office to get Tax put onto the vehicle as you cannot get your car Tax without an MOT. As far as we are aware, these rules still stand. It is STRONGLY ADVISED that a vehicle that has been deemed ‘Dangerous to Drive’ should not be driven.

Diesel Emissions –  The new Diesel Emissions limits have been more applied to newer vehicles. A vehicle from 2008-2009 that has the manufacturers emission limit plate has to be tested to this limit. We had a 2015 Volvo V40 D2 R-Design in for MOT test recently. This vehicle is driven daily and not around town, plenty of motorway use and driven at varying speeds. It was passing its test up until the point of emissions. Under the old emissions limits, it would have been a fast pass, meaning it would have gone through on its first full acceleration with a reading of 0.55. Because this vehicle has the manufacturers emissions limit plate, it had to be tested to 0.50 instead of the old 1.5 limit. As we knew the vehicle didn’t have any Engine Management issues, we were able to Hydroflow it and perform an internal engine clean on it, which brought the emissions down to a comfortable 0.40. For a lot of the emissions issues, we have found the Hydroflow system we invested in last year, has managed to save a lot of vehicles, which would have been probably scrapped if the only option would have been a replacement catalytic converter.

Dash Warning Lights – Over the last couple of years, dash warning lights have started to be added to the MOT test such as ABS and Airbag. Since May, we have found the majority of the dash warning lights have been added, especially Engine Management. Sadly, this could mean a lot of car owner’s will be either trading in their cars or scrapping vehicles where owner’s can’t afford to replace faulty parts that are causing Engine Management codes. ABS lights need be operational, seen when the ignition is turned on, illuminated after vehicle starts and turns off seconds afterwards. If people are aware that these lights are illuminated when booking an MOT, it would be advisable to ask for a Code Read/Diagnostic at the same time, as some fault codes can be caused by low battery voltage, implausible information from sensors and many other things. These codes may simply need resetting and if they reoccur, we can then move onto diagnosing the fault for you.

These are some of the things we have been asked about in the last couple of months, if there is anything that you would like more information on, please contact us at and we can either create another blog post about it or reply to your concerns via email.