{"id":26778,"date":"2026-07-19T17:39:10","date_gmt":"2026-07-19T16:39:10","guid":{"rendered":"https:\/\/www.cathive.co.uk\/advice\/"},"modified":"2026-10-01T19:33:40","modified_gmt":"2026-10-01T18:33:40","slug":"advice","status":"publish","type":"page","link":"https:\/\/www.cathive.co.uk\/de\/advice\/","title":{"rendered":"Ratgeber: Katalysator und Dieselpartikelfilter"},"content":{"rendered":"<p>Plain-English guides to choosing, fitting and looking after catalytic converters, DPFs and related exhaust parts, based on the manufacturer&#8217;s own technical guidance and UK law. If you can&#8217;t find an answer here, call us on the number above or email <a href=\"mailto:info@cathive.co.uk\">info@cathive.co.uk<\/a>.<\/p>\n<h2>Choosing the right part<\/h2>\n<ul>\n<li><a href=\"\/advice\/what-does-a-catalytic-converter-do\/\"><strong>What is a catalytic converter and what does it do?<\/strong><\/a> How cats work, petrol vs diesel, and why they need replacing.<\/li>\n<li><a href=\"\/advice\/what-is-a-dpf\/\"><strong>What is a DPF and how does regeneration work?<\/strong><\/a> Soot traps and regeneration: passive, active and forced.<\/li>\n<li><a href=\"\/advice\/type-approval-and-the-law\/\"><strong>Type-approved cats and DPFs: what UK law requires<\/strong><\/a> When an approved part is legally required, and how to tell a part qualifies.<\/li>\n<li><a href=\"\/advice\/euro-emissions-standards\/\"><strong>Euro 1 to Euro 6 emissions standards explained<\/strong><\/a> The standards, clean-air zone charges, and finding your vehicle&#8217;s.<\/li>\n<li><a href=\"\/advice\/understanding-part-numbers\/\"><strong>BM Catalysts part numbers explained<\/strong><\/a> What BM11, FK, PP and the H and P suffixes mean, and why serial numbers matter.<\/li>\n<\/ul>\n<h2>Fitting<\/h2>\n<ul>\n<li><a href=\"\/advice\/why-catalytic-converters-fail\/\"><strong>What causes a faulty catalytic converter?<\/strong><\/a> Diagnose the real cause before you fit, or the new cat dies the same way.<\/li>\n<li><a href=\"\/advice\/why-dpfs-block\/\"><strong>Blocked DPF? The causes to fix before replacing it<\/strong><\/a> The full pre-replacement checklist, from driving patterns to glow plugs and fuel vaporisers.<\/li>\n<li><a href=\"\/advice\/fitting-a-catalytic-converter\/\"><strong>How to fit a catalytic converter, step by step<\/strong><\/a> Removal and installation, with the warnings that protect your warranty.<\/li>\n<li><a href=\"\/advice\/fitting-a-dpf\/\"><strong>How to replace a DPF: fitting and ECU set-up<\/strong><\/a> The mechanical swap <em>and<\/em> the ECU set-up that makes or breaks the job.<\/li>\n<li><a href=\"\/advice\/vehicle-specific-fitting-notes\/\"><strong>DPF fitting notes: Vauxhall Zafira, Fords and BMWs<\/strong><\/a> Known quirks, including Boxer, Relay and Ducato vans.<\/li>\n<\/ul>\n<h2>Aftercare, MOT &amp; warranty<\/h2>\n<ul>\n<li><a href=\"\/blog\/failed-mot-emissions\/\"><strong>Failed your MOT on emissions? What to do next<\/strong><\/a> What the CO, HC, lambda and smoke results point to, and what to fix before you buy anything.<\/li>\n<li><a href=\"\/advice\/looking-after-your-dpf\/\"><strong>How to look after your DPF and catalytic converter<\/strong><\/a> The habits that make these parts last the life of the vehicle.<\/li>\n<li><a href=\"\/advice\/dpf-removal-and-the-law\/\"><strong>Is DPF removal or a DPF delete legal in the UK?<\/strong><\/a> Why removal is illegal, how the MOT catches it, and what to do instead.<\/li>\n<li><a href=\"\/advice\/warranty\/\"><strong>Catalytic converter and DPF warranty: how to claim<\/strong><\/a> What&#8217;s covered, what isn&#8217;t and why, and how to make a claim go smoothly.<\/li>\n<\/ul>\n<h2>Shop by part type<\/h2>\n<p><a href=\"\/product-category\/catalytic-converter\/\">Catalytic converters<\/a> \u00b7 <a href=\"\/product-category\/dpf\/\">DPFs<\/a> \u00b7 <a href=\"\/product-category\/catalytic-converter-dpf\/\">Catalytic converter and DPF units<\/a> \u00b7 <a href=\"\/product-category\/catalytic-converter-gpf\/\">Catalytic converter and GPF units<\/a> \u00b7 <a href=\"\/product-category\/scr-dpf\/\">SCR and DPF units<\/a> \u00b7 <a href=\"\/product-category\/pressure-pipe\/\">Pressure pipes<\/a> \u00b7 <a href=\"\/product-category\/exhaust-pipe\/\">Exhaust pipes<\/a> \u00b7 <a href=\"\/fitting-kits\/\">Fitting kits<\/a> \u00b7 <a href=\"\/parts\/\">Find your vehicle<\/a><\/p>\n<p>Ready to find your part? Start with the <a href=\"\/#ch-make\">part finder<\/a>, or search any Klarius, Bosal, Walker, EEC or OE part number directly from the search box.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Verst\u00e4ndliche Ratgeber zu Katalysator, DPF und OPF: Funktion, Ausfallursachen, Einbau, Abgasuntersuchung bei der HU, Rechtslage und Garantie.<\/p>\n","protected":false},"author":0,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-26778","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.cathive.co.uk\/de\/wp-json\/wp\/v2\/pages\/26778","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.cathive.co.uk\/de\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.cathive.co.uk\/de\/wp-json\/wp\/v2\/types\/page"}],"replies":[{"embeddable":true,"href":"https:\/\/www.cathive.co.uk\/de\/wp-json\/wp\/v2\/comments?post=26778"}],"version-history":[{"count":1,"href":"https:\/\/www.cathive.co.uk\/de\/wp-json\/wp\/v2\/pages\/26778\/revisions"}],"predecessor-version":[{"id":26919,"href":"https:\/\/www.cathive.co.uk\/de\/wp-json\/wp\/v2\/pages\/26778\/revisions\/26919"}],"wp:attachment":[{"href":"https:\/\/www.cathive.co.uk\/de\/wp-json\/wp\/v2\/media?parent=26778"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}