How Diesel Particulate Filters work How to avoid DPF problems How much is it to clean a DPF? A Diesel Particulate Filter — known as a DPF for ease — is part of a diesel car's exhaust system, designed ...
German diesel car drivers, for example, face the threat of an additional road tax of €1.2 per 0.1 liter of engine displacement if their car doesn't have an diesel particulate filter (DPF).