{"id":8190,"date":"2026-09-30T08:10:44","date_gmt":"2026-09-30T08:10:44","guid":{"rendered":"https:\/\/metalaxis.fi\/dpf-vai-katalysaattori-nain-tunnistat-osan-ennen-myyntia\/"},"modified":"2026-09-30T10:25:37","modified_gmt":"2026-09-30T10:25:37","slug":"dpf-or-catalytic-converter-how-to-identify-the-part","status":"publish","type":"post","link":"https:\/\/metalaxis.fi\/en\/dpf-or-catalytic-converter-how-to-identify-the-part\/","title":{"rendered":"DPF or Catalytic Converter? How to Identify the Part Before You Sell"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"8190\" class=\"elementor elementor-8190 elementor-8183\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-348d8f7c e-flex e-con-boxed e-con e-parent\" data-id=\"348d8f7c\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-336219dc elementor-widget elementor-widget-text-editor\" data-id=\"336219dc\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div><p><strong>Overview:<\/strong>\u00a0The steel canister taken off an exhaust system might be a converter, a particulate filter or an SCR unit &#8211; and their values differ substantially. This guide explains how to tell them apart by position, shape and markings, which of them contain recoverable precious metals and which do not, and what to do before the part goes to a buyer.<\/p><\/div><div class=\"tldr\"><h2>Key Takeaways<\/h2><ul><li><strong>The value is in the coating, not the casing.<\/strong>\u00a0Platinum, palladium and rhodium sit as a thin layer on the honeycomb.<\/li><li><strong>A converter and a particulate filter are different parts<\/strong>, even though they can look alike and sometimes share one housing.<\/li><li><strong>An SCR core usually contains no precious metals at all<\/strong>\u00a0&#8211; it is based on vanadia or a zeolite.<\/li><li><strong>Diesel and petrol units differ in metal ratio:<\/strong>\u00a0diesel leans towards platinum, petrol towards palladium and rhodium.<\/li><li><strong>Never cut the part open.<\/strong>\u00a0An emptied or cut unit loses almost all of its value.<\/li><li><strong>Markings decide.<\/strong>\u00a0The code stamped on the casing tells you more than size or weight.<\/li><li><strong>Removing the part from a road-legal car is not permitted<\/strong>\u00a0&#8211; a replaced unit is recycled, a working one is not removed.<\/li><\/ul><\/div><h2>Why the difference matters to a seller<\/h2><p>Whether you are holding a\u00a0<strong><a href=\"https:\/\/metalaxis.fi\/en\/catalytic-converter-recycling\/\">catalytic converter<\/a><\/strong>\u00a0or a particulate filter largely decides what you should expect for it. Both are exhaust after-treatment components, both are steel canisters, and both look much the same underneath a car. What is inside them is not the same at all.<\/p><p>A converter&#8217;s value comes from the precious metal coating on the surface of its honeycomb. A particulate filter&#8217;s job is to trap soot, and in some models the coating is far thinner or absent altogether. In an SCR unit the active material is a different element entirely. Put all three in one pile and sell them by weight, and you lose money every time.<\/p><h2>DPF filter or converter: how do the parts differ?<\/h2><p>A modern diesel car can have three or four separate units in sequence along the exhaust. When you are trying to work out afterwards whether you have a dpf filter or a converter, the clues are position, housing shape and connection points.<\/p><h3>Position in the exhaust<\/h3><p>The oxidation catalyst sits closest to the engine, because it needs high temperature to work. The particulate filter comes after it. The SCR unit is furthest back, with an AdBlue injector ahead of it. If a garage removed the part, ask which position it came from &#8211; it is the fastest identification method there is.<\/p><h3>External features<\/h3><p>A particulate filter usually has two differential pressure sensor ports, one on each side of the core, and on some models a separate temperature sensor boss. A converter generally has neither. An SCR unit is recognisable from the urea injector mounting. These ports remain in the housing even if the sensors have been stripped out.<\/p><table><thead><tr><th>Part<\/th><th>How to recognise it<\/th><th>Contains precious metal?<\/th><\/tr><\/thead><tbody><tr><td>Oxidation catalyst (DOC)<\/td><td>Closest to the engine, no sensor ports either side of the core<\/td><td>Yes &#8211; platinum and palladium<\/td><\/tr><tr><td>Particulate filter (DPF)<\/td><td>Two differential pressure ports, denser core<\/td><td>Varies &#8211; yes on coated models, no on uncoated ones<\/td><\/tr><tr><td>SCR unit<\/td><td>Urea injector mounting, AdBlue line<\/td><td>Usually not<\/td><\/tr><tr><td>Three-way converter (petrol)<\/td><td>Single housing, lambda sensor bosses<\/td><td>Yes &#8211; platinum, palladium and rhodium<\/td><\/tr><\/tbody><\/table><p><em>Source: Metalaxis &#8211; identification and valuation practice, 2026.<\/em><\/p><h2>What is a diesel oxidation catalyst, and what is in it?<\/h2><p>A diesel oxidation catalyst is the unit that converts carbon monoxide and unburnt hydrocarbons into carbon dioxide and water. Its coating leans towards platinum, because diesel exhaust is cooler and richer in oxygen than that of a petrol engine.<\/p><p>This matters to a seller because platinum and palladium prices move at different rates. The same physical size can therefore mean a very different value depending on which engine type the part came from. For more background on how the figure is built, see\u00a0<a href=\"https:\/\/metalaxis.fi\/en\/catalytic-converter-price-revealed\/\">catalytic converter price revealed<\/a>.<\/p><h2>SCR catalytic converter and AdBlue: why the value is different<\/h2><p>An SCR catalytic converter is the unit that urea, or AdBlue, is injected into in order to reduce nitrogen oxides. And here is the most important detail in this article: an SCR core usually contains no precious metals at all.<\/p><p>The active material is typically vanadia based or zeolite based, as described for heavy-duty SCR technology in the Springer volume\u00a0<a href=\"https:\/\/link.springer.com\/chapter\/10.1007\/978-1-4899-8071-7_3\" target=\"_blank\" rel=\"noopener\">Urea-SCR Technology for deNOx After Treatment of Diesel Exhausts<\/a>. Vanadium is not a precious metal, and it is not recovered in the way platinum is.<\/p><p>That does not mean an SCR housing is always worthless. In many vehicles an ammonia slip catalyst is integrated into the same housing, and that does contain platinum. So an SCR unit is worth having assessed rather than written off as scrap steel.<\/p><h3>NOx trap: a different part with real value<\/h3><p>A NOx trap, or lean NOx trap, is not the same thing as SCR. It is a storage-type unit that adsorbs nitrogen oxides and purges them periodically. Unlike an SCR core, a trap does contain platinum, palladium and rhodium, which makes it a genuinely interesting part in recycling. If you are unsure which you have, do not guess: an AdBlue tank in the car points to an SCR system, the absence of one points to a trap.<\/p><h2>Is dpf cleaning an alternative to replacement?<\/h2><p>Sometimes, and it is worth knowing when. Professional dpf cleaning can restore a filter that is loaded with soot and ash but structurally sound, and it is normally cheaper than a new unit. It cannot repair a core that has melted, cracked or partially collapsed, and it will not resolve an underlying engine fault that caused the blockage in the first place.<\/p><p>The practical test is what a diagnostic check finds. If the filter is intact and the pressure readings simply show heavy loading, cleaning or a forced regeneration may buy real time. If the core is damaged, cleaning delays the inevitable, and the removed filter still holds recoverable metal in its coating. Related symptoms are covered in\u00a0<a href=\"https:\/\/metalaxis.fi\/en\/is-your-catalytic-converter-failing-7-key-signs\/\">is your catalytic converter failing &#8211; 7 key signs<\/a>.<\/p><h2>How to identify the part in five steps<\/h2><ol><li><strong>Ask the garage which position it came from.<\/strong>\u00a0Sequence along the exhaust tells you more than appearance.<\/li><li><strong>Look for the casing markings.<\/strong>\u00a0The manufacturer&#8217;s code is usually stamped into the shell or onto a welded plate. Surface rust comes off with a wire brush.<\/li><li><strong>Count the sensor ports.<\/strong>\u00a0Two ports either side of the core point to a particulate filter.<\/li><li><strong>Check whether the car has an AdBlue tank.<\/strong>\u00a0If it does, there is an SCR unit in the exhaust &#8211; and most likely a separate oxidation catalyst too.<\/li><li><strong>Photograph the part and its markings<\/strong>\u00a0before transport, and send the images for assessment in advance.<\/li><\/ol><section style=\"margin: 32px 0; font-family: inherit;\"><h3>What the car&#8217;s model year tells you about the exhaust<\/h3><p style=\"margin: 0 0 16px; line-height: 1.6; font-family: inherit;\">Emissions standards do not mandate technology, but they drive it. This is how the limits tightened.<\/p><ol style=\"display: flex; flex-wrap: wrap; gap: 12px; margin: 0; padding: 0; list-style: none; font-family: inherit;\"><li style=\"flex: 1 1 200px; box-sizing: border-box; margin: 0; padding: 18px; border-top: 4px solid #053665; background-color: #e0f9fd !important; color: #053665 !important; font-family: inherit;\"><p style=\"margin: 0 0 8px; font-size: 13px; font-weight: 600; letter-spacing: 0.03em; color: #25727e !important; font-family: inherit;\">1\u00a0September 2009<\/p><h4>Euro 5 &#8211; new type approvals<\/h4><p style=\"margin: 0; font-size: 15px; line-height: 1.55; color: #053665 !important; font-family: inherit;\">Diesel cars gain an oxidation catalyst and a particulate filter.<\/p><\/li><li style=\"flex: 1 1 200px; box-sizing: border-box; margin: 0; padding: 18px; border-top: 4px solid #053665; background-color: #e0f9fd !important; color: #053665 !important; font-family: inherit;\"><p style=\"margin: 0 0 8px; font-size: 13px; font-weight: 600; letter-spacing: 0.03em; color: #25727e !important; font-family: inherit;\">1\u00a0January 2011<\/p><h4>Euro 5 &#8211; all new registrations<\/h4><p style=\"margin: 0; font-size: 15px; line-height: 1.55; color: #053665 !important; font-family: inherit;\">In practice every new diesel carries a particulate filter.<\/p><\/li><li style=\"flex: 1 1 200px; box-sizing: border-box; margin: 0; padding: 18px; border-top: 4px solid #053665; background-color: #e0f9fd !important; color: #053665 !important; font-family: inherit;\"><p style=\"margin: 0 0 8px; font-size: 13px; font-weight: 600; letter-spacing: 0.03em; color: #25727e !important; font-family: inherit;\">1\u00a0September 2011 and 1\u00a0January 2013<\/p><h4>Particle number limits<\/h4><p style=\"margin: 0; font-size: 15px; line-height: 1.55; color: #053665 !important; font-family: inherit;\">Coated filters become the prevailing solution.<\/p><\/li><li style=\"flex: 1 1 200px; box-sizing: border-box; margin: 0; padding: 18px; border: 3px solid #3699A7; background-color: #e0f9fd !important; color: #053665 !important; font-family: inherit;\"><p style=\"margin: -18px -18px 12px; padding: 10px 18px; font-size: 13px; font-weight: 600; letter-spacing: 0.03em; background-color: #053665 !important; color: #ffffff !important; font-family: inherit;\">1\u00a0September 2014 and 1\u00a0September 2015<\/p><h4>Euro 6<\/h4><p style=\"margin: 0; font-size: 15px; line-height: 1.55; color: #053665 !important; font-family: inherit;\">Nitrogen oxide limits lead to SCR with AdBlue, or to a NOx trap.<\/p><\/li><\/ol><p style=\"margin: 16px 0 0; padding: 16px 18px; border-top: 3px solid #8A4B10; line-height: 1.6; background-color: #fdf1e3 !important; color: #8a4b10 !important; font-family: inherit;\">The model year gives you a probability, not a certainty. The regulation sets emission limits rather than technology, so the same year can carry different solutions. Always confirm the AdBlue tank and the sensor ports before deciding which part you have.<\/p><p style=\"margin: 12px 0 0; font-size: 13px; line-height: 1.5; color: #25727e; font-family: inherit;\">Source: Regulation (EC) No 715\/2007 of the European Parliament and of the Council, Article 10.<\/p><\/section><h3>What if the markings have worn away?<\/h3><p>In Finnish conditions this is common. Road salt, damp and ten winters can corrode the stamping until nothing is legible even after a wire brush. The part is still identifiable: housing dimensions, core structure, port positions and the vehicle&#8217;s own details usually narrow it to a handful of options. This is why the garage paperwork is worth keeping &#8211; make, model, year and engine code between them substitute for a missing stamp almost completely.<\/p><p>Heavy vehicles are a different case. Units from lorries and machinery are considerably larger, and SCR has been standard there for longer than in passenger cars. Large size does not mean high value if the part is a bare SCR core &#8211; and conversely, the oxidation catalyst from the same vehicle can be extremely valuable. Separate parts by vehicle, not by size.<\/p><h2>What will you get for it?<\/h2><p>Many people search for a\u00a0<strong><a href=\"https:\/\/metalaxis.fi\/en\/catalytic-converter-recycling\/\">dpf price<\/a><\/strong>\u00a0and expect one number. There is not one, and the reason is not secrecy. The figure is derived from measured metal content, and content varies between models by several multiples.<\/p><p>The same applies to a\u00a0<strong><a href=\"https:\/\/metalaxis.fi\/en\/catalytic-converter-recycling\/\">diesel particulate filter<\/a><\/strong>\u00a0and its scrap value. A coated filter and an uncoated filter can be externally identical and in completely different value brackets. The only reliable route is identification and analysis, not a visual estimate or a weight.<\/p><p>Why that is worth the trouble: a 2025 review in\u00a0<a href=\"https:\/\/www.sciencedirect.com\/science\/article\/pii\/S0921344924006931\" target=\"_blank\" rel=\"noopener\">Resources, Conservation and Recycling<\/a>\u00a0reports precious metal content in spent automotive catalysts at 1,000 to 3,000 grams per tonne, against grades in natural deposits generally below 10 grams per tonne. The difference is roughly a hundredfold, and it is exactly what makes a removed part an industrial raw material rather than scrap. Current price levels in Finland are collected in\u00a0<a href=\"https:\/\/metalaxis.fi\/en\/how-much-is-a-catalytic-converter-worth-in-finland-in-2026\/\">how much is a catalytic converter worth in Finland in 2026<\/a>.<\/p><h2>What not to do<\/h2><p><strong>Do not open the housing.<\/strong>\u00a0A common misconception is that the core alone is worth more. It is not. An opened unit cannot be identified reliably, and an emptied housing is effectively worthless.<\/p><p><strong>Do not pile parts together.<\/strong>\u00a0A converter, a particulate filter and an SCR unit are assessed separately. No accurate price can be given for a mixed batch.<\/p><p><strong>Do not accept a price before identification.<\/strong>\u00a0A figure quoted over the phone with no code and no photographs is a bid on your uncertainty.<\/p><p><strong>Do not discard the garage paperwork.<\/strong>\u00a0It shows which vehicle the part came from.<\/p><h2>Removal and roadworthiness testing<\/h2><p>Removing a working converter or particulate filter from a vehicle in road use is not permitted. Under\u00a0<a href=\"https:\/\/www.traficom.fi\/sites\/default\/files\/media\/regulation\/FI%20Ajoneuvojen%20m%C3%A4%C3%A4r%C3%A4aikaiskatsastuksen%20arvosteluperusteet.pdf\" target=\"_blank\" rel=\"noopener\">Traficom&#8217;s periodic inspection assessment criteria<\/a>, defects relating to exhaust after-treatment affect the inspection result, and a missing part is one of them.<\/p><p>The lawful route is simple: a faulty part is replaced at a garage with a compliant new one, and the old unit goes for recycling. That keeps the car roadworthy and puts the precious metals back into circulation.<\/p><h2>Summary<\/h2><p>Identification before selling is the whole point. Establish which position along the exhaust the part came from, find the casing code, count the sensor ports and check whether the car has an AdBlue tank. Keep the part intact, keep batches separate, and let the analysis set the price.<\/p><p>Do that, and you get what is actually in the part. Skip it, and you are selling a steel canister. Send photographs and markings to\u00a0<a href=\"https:\/\/metalaxis.fi\/en\/catalytic-converter-recycling\/\">Metalaxis catalytic converter recycling<\/a>\u00a0and you will have an assessment before the part moves anywhere.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-484c7bc elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"484c7bc\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-1a3fd49\" data-id=\"1a3fd49\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-35a8a0c elementor-widget elementor-widget-heading\" data-id=\"35a8a0c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">FAQ<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-1dc422c elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"1dc422c\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-4bb7622\" data-id=\"4bb7622\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-634a986 elementor-widget elementor-widget-accordion\" data-id=\"634a986\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"accordion.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-accordion\">\n\t\t\t\t\t\t\t<div class=\"elementor-accordion-item\">\n\t\t\t\t\t<div id=\"elementor-tab-title-1041\" class=\"elementor-tab-title\" data-tab=\"1\" role=\"button\" aria-controls=\"elementor-tab-content-1041\" aria-expanded=\"false\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon elementor-accordion-icon-left\" aria-hidden=\"true\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-closed\"><i class=\"fas fa-plus\"><\/i><\/span>\n\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-opened\"><i class=\"fas fa-minus\"><\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-accordion-title\" tabindex=\"0\">How do I know whether the part is a catalytic converter or a particulate filter?<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<div id=\"elementor-tab-content-1041\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"1\" role=\"region\" aria-labelledby=\"elementor-tab-title-1041\"><p>The surest method is to establish which position along the exhaust it was removed from: the oxidation catalyst sits closest to the engine and the particulate filter comes after it. On a removed part, a particulate filter is often recognisable from two differential pressure sensor ports on either side of the core, which a converter generally does not have. The code stamped on the casing is the most reliable identifier, and the part can be matched against a database from it.<\/p><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-accordion-item\">\n\t\t\t\t\t<div id=\"elementor-tab-title-1042\" class=\"elementor-tab-title\" data-tab=\"2\" role=\"button\" aria-controls=\"elementor-tab-content-1042\" aria-expanded=\"false\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon elementor-accordion-icon-left\" aria-hidden=\"true\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-closed\"><i class=\"fas fa-plus\"><\/i><\/span>\n\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-opened\"><i class=\"fas fa-minus\"><\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-accordion-title\" tabindex=\"0\">Does a particulate filter contain precious metals?<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<div id=\"elementor-tab-content-1042\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"2\" role=\"region\" aria-labelledby=\"elementor-tab-title-1042\"><p>It varies by model. Coated particulate filters contain platinum and palladium, which assist soot burn-off, while uncoated filters contain essentially none. The two can be almost identical externally, which is why a filter&#8217;s value cannot be inferred from shape or weight and has to be established through identification and analysis.<\/p><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-accordion-item\">\n\t\t\t\t\t<div id=\"elementor-tab-title-1043\" class=\"elementor-tab-title\" data-tab=\"3\" role=\"button\" aria-controls=\"elementor-tab-content-1043\" aria-expanded=\"false\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon elementor-accordion-icon-left\" aria-hidden=\"true\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-closed\"><i class=\"fas fa-plus\"><\/i><\/span>\n\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-opened\"><i class=\"fas fa-minus\"><\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-accordion-title\" tabindex=\"0\">Is an SCR unit worth selling?<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<div id=\"elementor-tab-content-1043\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"3\" role=\"region\" aria-labelledby=\"elementor-tab-title-1043\"><p>It is worth having assessed at least. An SCR core itself is typically based on a vanadia or zeolite active material and contains no precious metals, so its value is clearly lower than a converter&#8217;s. In many vehicles, however, an ammonia slip catalyst containing platinum is integrated into the same housing, so the unit should not be written off without checking.<\/p><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-accordion-item\">\n\t\t\t\t\t<div id=\"elementor-tab-title-1044\" class=\"elementor-tab-title\" data-tab=\"4\" role=\"button\" aria-controls=\"elementor-tab-content-1044\" aria-expanded=\"false\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon elementor-accordion-icon-left\" aria-hidden=\"true\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-closed\"><i class=\"fas fa-plus\"><\/i><\/span>\n\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-opened\"><i class=\"fas fa-minus\"><\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-accordion-title\" tabindex=\"0\">Why does the dpf price vary so much?<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<div id=\"elementor-tab-content-1044\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"4\" role=\"region\" aria-labelledby=\"elementor-tab-title-1044\"><p>Because the figure is based on measured precious metal content, and content varies between models by several multiples. Platinum, palladium and rhodium market prices also move daily and at different rates from each other, so the same part can be worth different amounts in different weeks. This is why no published price list can replace identification and analysis of the individual part.<\/p><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-accordion-item\">\n\t\t\t\t\t<div id=\"elementor-tab-title-1045\" class=\"elementor-tab-title\" data-tab=\"5\" role=\"button\" aria-controls=\"elementor-tab-content-1045\" aria-expanded=\"false\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon elementor-accordion-icon-left\" aria-hidden=\"true\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-closed\"><i class=\"fas fa-plus\"><\/i><\/span>\n\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-opened\"><i class=\"fas fa-minus\"><\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-accordion-title\" tabindex=\"0\">Can dpf cleaning save a blocked filter?<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<div id=\"elementor-tab-content-1045\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"5\" role=\"region\" aria-labelledby=\"elementor-tab-title-1045\"><p>Sometimes. Professional cleaning can restore a filter that is heavily loaded with soot and ash but structurally intact, and it is normally cheaper than replacement. It cannot repair a melted or cracked core, and it does not fix the engine fault that caused the blockage, so a diagnostic check should decide between cleaning and replacement before money is spent either way.<\/p><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-accordion-item\">\n\t\t\t\t\t<div id=\"elementor-tab-title-1046\" class=\"elementor-tab-title\" data-tab=\"6\" role=\"button\" aria-controls=\"elementor-tab-content-1046\" aria-expanded=\"false\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon elementor-accordion-icon-left\" aria-hidden=\"true\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-closed\"><i class=\"fas fa-plus\"><\/i><\/span>\n\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-opened\"><i class=\"fas fa-minus\"><\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-accordion-title\" tabindex=\"0\">May a converter or particulate filter be removed from a car?<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<div id=\"elementor-tab-content-1046\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"6\" role=\"region\" aria-labelledby=\"elementor-tab-title-1046\"><p>No. Removing a functioning emissions control component from a vehicle in road use is not permitted, and a missing part affects the periodic inspection result. The lawful approach is to have the faulty part replaced with a compliant new one at a garage and send the old unit for recycling, which keeps the car roadworthy and recovers the precious metals.<\/p><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-accordion-item\">\n\t\t\t\t\t<div id=\"elementor-tab-title-1047\" class=\"elementor-tab-title\" data-tab=\"7\" role=\"button\" aria-controls=\"elementor-tab-content-1047\" aria-expanded=\"false\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon elementor-accordion-icon-left\" aria-hidden=\"true\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-closed\"><i class=\"fas fa-plus\"><\/i><\/span>\n\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-opened\"><i class=\"fas fa-minus\"><\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-accordion-title\" tabindex=\"0\">Why should the part not be opened?<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<div id=\"elementor-tab-content-1047\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"7\" role=\"region\" aria-labelledby=\"elementor-tab-title-1047\"><p>An opened unit cannot be identified reliably, because the casing markings lose their meaning once the core material is loose, and an emptied housing is effectively worthless. Core dust is also harmful if inhaled. Keep the part intact, clean the markings so they are legible, and leave dismantling to the recycler as part of the analysis process.<\/p><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t<script type=\"application\/ld+json\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"How do I know whether the part is a catalytic converter or a particulate filter?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"<p>The surest method is to establish which position along the exhaust it was removed from: the oxidation catalyst sits closest to the engine and the particulate filter comes after it. On a removed part, a particulate filter is often recognisable from two differential pressure sensor ports on either side of the core, which a converter generally does not have. The code stamped on the casing is the most reliable identifier, and the part can be matched against a database from it.<\\\/p>\"}},{\"@type\":\"Question\",\"name\":\"Does a particulate filter contain precious metals?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"<p>It varies by model. Coated particulate filters contain platinum and palladium, which assist soot burn-off, while uncoated filters contain essentially none. The two can be almost identical externally, which is why a filter&#8217;s value cannot be inferred from shape or weight and has to be established through identification and analysis.<\\\/p>\"}},{\"@type\":\"Question\",\"name\":\"Is an SCR unit worth selling?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"<p>It is worth having assessed at least. An SCR core itself is typically based on a vanadia or zeolite active material and contains no precious metals, so its value is clearly lower than a converter&#8217;s. In many vehicles, however, an ammonia slip catalyst containing platinum is integrated into the same housing, so the unit should not be written off without checking.<\\\/p>\"}},{\"@type\":\"Question\",\"name\":\"Why does the dpf price vary so much?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"<p>Because the figure is based on measured precious metal content, and content varies between models by several multiples. Platinum, palladium and rhodium market prices also move daily and at different rates from each other, so the same part can be worth different amounts in different weeks. This is why no published price list can replace identification and analysis of the individual part.<\\\/p>\"}},{\"@type\":\"Question\",\"name\":\"Can dpf cleaning save a blocked filter?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"<p>Sometimes. Professional cleaning can restore a filter that is heavily loaded with soot and ash but structurally intact, and it is normally cheaper than replacement. It cannot repair a melted or cracked core, and it does not fix the engine fault that caused the blockage, so a diagnostic check should decide between cleaning and replacement before money is spent either way.<\\\/p>\"}},{\"@type\":\"Question\",\"name\":\"May a converter or particulate filter be removed from a car?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"<p>No. Removing a functioning emissions control component from a vehicle in road use is not permitted, and a missing part affects the periodic inspection result. The lawful approach is to have the faulty part replaced with a compliant new one at a garage and send the old unit for recycling, which keeps the car roadworthy and recovers the precious metals.<\\\/p>\"}},{\"@type\":\"Question\",\"name\":\"Why should the part not be opened?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"<p>An opened unit cannot be identified reliably, because the casing markings lose their meaning once the core material is loose, and an emptied housing is effectively worthless. Core dust is also harmful if inhaled. Keep the part intact, clean the markings so they are legible, and leave dismantling to the recycler as part of the analysis process.<\\\/p>\"}}]}<\/script>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Overview:\u00a0The steel canister taken off an exhaust system might be a converter, a particulate filter or an SCR unit &#8211; and their values differ substantially. This guide explains how to tell them apart by position, shape and markings, which of&#8230;<\/p>\n","protected":false},"author":2,"featured_media":8186,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_sitemap_exclude":false,"_sitemap_priority":"","_sitemap_frequency":"","footnotes":""},"categories":[61],"tags":[],"class_list":["post-8190","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-catalytic-converters"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>DPF or Catalytic Converter? How to Identify It | Metalaxis<\/title>\n<meta name=\"description\" content=\"DPF, catalytic converter or SCR? 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