So why does a car not fail the smoke test if the DPF is removed? Removing the DPF will not cause the opacity level to rise high enough to fail, in fact, it is very difficult to get a diesel vehicle to fail an MOT smoke test, the fail mark is very high. track cars) or you are exporting your vehicle from the UKĪ DPF is designed to filter out soot from diesel exhaust gasses, therefore a DPF will reduce the opacity of the smoke. For this reason we would only ever recommend removing the DPF from your vehicle if your vehicle is not used on UK roads (i.e. Removing the DPF from your vehicle is almost certainly going to cause you issues with your MOT.

We can usually remove the DPF from your vehicle for a fraction of that price. Due to a Diesel Particle Filter being described by dealerships as a ‘wear and tear’ item, vehicle manufacturers will not replace them under warranty and can be costly (usually around £1,500) to replace.

Many filters become clogged as a result of them failing to regenerate and therefore display warning lights on the dashboard and in some cases limiting engine performance. This can be done via removing the ECU and programming it on the bench or flashing it through the OBD socket inside the car.įor many people, removing the DPF from the exhaust system will be because they have experienced problems with the unit itself. At Big Fish, we usually remove the DPF brick from the existing pipe, and refit.įollowing removal, the software needs to be removed from the ECU of the car so that the active and passive regeneration cycles, and any other DPF functions are no longer in operation. Both of these methods are permanent and tested. We can either do the full works of removal and tuning or simply delete the DPF software from your vehicle post removal.įor full DPF removal the filter hardware needs to be removed from the exhaust system and this can be achieved via two methods:ġ) A replacement pipe can be fitted (only available on some vehicles)Ģ) The current pipe can be modified by removing the DPF brick from the inside. At Big Fish we offer two services regarding DPF removal.

Dpf egr remover software