[ainarssems]

Originally Posted by homer simpson

A lot of places used to do this modification but it has been illegal for a while now so not sure which garages still do this. Even if they do, they are unlikely to advertise it. It is also an MOT failure as the checks are more stringent so not sure if a missing DPF still passes if remapped out.

It's not illegal to remove it, you are just not allowed to use it on road with modified emmisions sysetem. Regards MOT - yest it's a failure if they know it should be there and they can see it has been removed but normally you leave the can in place just take the guts out either cutting it open on the top where it cannot be seen and welding back up or braking it up in pieces and just pouring out of one end. And you can easily pass smoke test without DPF. My A6 without DPF passes Fast test with about 30% of the smoke limit first try every year. Fast test is the same for all cars DPF or no DPF, if you fail fast test then they look if your car is allowed more smoke.