What happens with stuff like this if you buy a car not knowing it's been modified? Unless I could tell through the drivability, it's unlikely that if an MOTer can't visually prove anything, I'm going to be able to. Now chances are that if someone has had all the dpf stuff done and decides to sell, he/she is (was:-))going to use that as plus point in the advert, same as a good remap. If Nick hadn't told me my GT was remapped, I wouldn't have known and therefore wouldn't have declared the MOD to the insurers, same as al the other mods he did pre my ownership, how would I know they were mods if I wasn't an enthusiast?
So in the unfortunate aftermath of a crash, do you argue truthfully that you had no idea about the mods or, when you get banged up, do you start realising that your modded Bilstein coilover suspension wasn't in fact the hardest thing your ass has ever experienced.
You don't of course. However the difference with a DPF is that it can materially affect the exhaust emissions and render the vehicle illegal whereas your Coilovers are just another substituted part doing much the same job as the OEM stuff, albeit an illustration of the fact that you want to go round corners faster with an increased insurance risk. So the insurance company can get sniffy about your suspension mods but the LAW would get sniffy about DPF removal.
I doubt anyone with a cored-out DPF in a 2nd owner car will be going to Court anytime soon, but I wouldn't want to be the first nevertheless.
It wouldn't surprise me if over the next 5 years or so the emission standards on older vehicles wasn't tightened up and the tolerances reduced - thats if they are really committed to reducing pollution levels as they claim.
The kickback will come when the strong transport lobby take objection to having to put DPFs back on all their delivery trucks and vans which will raise their maintenance costs.
If you got caught out and bought a car which was subsequently found to be illegal then the existing Sales of Goods Act and Trading Standards would be the route to compensation. In the event of a crash where the insurers judged your vehicle to be illegal, the ABI have already stated that all Third Party Claims would be honoured, but of course you would not get any compensation for your vehicle or for your personal injuries.
However, to show how serious this is being taken, the London Councils have already been asked and had to give statements and undertakings that DPFs will not be removed from Council vehicles.