{"id":26788,"date":"2026-07-19T17:39:11","date_gmt":"2026-07-19T16:39:11","guid":{"rendered":"https:\/\/www.cathive.co.uk\/advice\/vehicle-specific-fitting-notes\/"},"modified":"2026-10-01T19:33:54","modified_gmt":"2026-10-01T18:33:54","slug":"vehicle-specific-fitting-notes","status":"publish","type":"page","link":"https:\/\/www.cathive.co.uk\/de\/advice\/vehicle-specific-fitting-notes\/","title":{"rendered":"DPF-Einbauhinweise: Opel Zafira, Ford und BMW"},"content":{"rendered":"

Most DPF replacements follow the same pattern \u2014 but a handful of vehicles have well-documented quirks that catch out even experienced fitters. If your vehicle is below, read its note before ordering or fitting. The general procedures are in fitting a DPF<\/a> and fitting a catalytic converter<\/a>.<\/p>\n

Vauxhall Zafira (diesel) \u2014 EGR valve first<\/h2>\n

The single most common cause of a blocked DPF on a Zafira is a faulty EGR valve. Trade practice when replacing a Zafira DPF is to renew the EGR valve, exhaust-gas temperature sensor and differential pressure sensor at the same time<\/strong> \u2014 main dealers widely follow the same policy, because an incorrectly diagnosed Zafira can block its new filter in as little as 50 miles. If the car has swirl flaps, check their operating rod too; when it drops off with wear, the DPF blocks.<\/p>\n

Euro 5 and Euro 6 Fords (and several PSA\/Fiat vans) \u2014 the fuel vaporiser<\/h2>\n

Euro 5\/6 Fords, along with vans such as the Peugeot Boxer, Citro\u00ebn Relay\/Jumper and Fiat Ducato, use a fuel vaporiser<\/strong> in the downpipe \u2014 a small injector that sprays diesel into the hot exhaust to bring the DPF up to regeneration temperature. Sitting in that gas stream, the vaporiser eventually clogs or fails, regeneration quietly stops, and the DPF blocks. Typical stored codes are P246B<\/strong> (conditions incorrect for regeneration) and P244C<\/strong> (exhaust temperature too low).<\/p>\n