The particulate filtering technology for Diesel engines has been rushed to market. As well as DPF filters, EGR valves are another thing that get clogged with soot and fail if you do too many short trips. The diesel engines Vauxhall&#x2F;Opel use are particularly susceptible to it. I had one fail in a 5 year old car, bought the part myself for £200 and my father in law helped me change it but that would have been a £500 garage bill in itself.