{"product_id":"bosch-cabin-air-filter-for-bmw-3-series-m3-x3-z3-c3640ws-activated-charcoal-multi-layer-99-at-3µm","title":"Bosch cabin air filter for BMW 3 Series, M3, X3, Z3 — C3640WS activated charcoal, multi-layer 99% at 3µm","description":"\u003cp\u003e\u003cstrong\u003eBosch C3640WS is a multi-layer activated charcoal cabin air filter engineered to remove dust, odors and harmful gases to improve in-car air quality.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis Bosch activated charcoal workshop cabin filter combines a five-layer filtration system and precision construction to deliver cleaner, fresher air inside compatible BMW models. It uses a combination of non-woven pre-filters, electrostatically charged microfiber and an activated carbon layer to trap particles and adsorb odor-causing gases that ordinary particulate filters can miss. The result is reduced dust, less windshield hazing from hydrocarbons, and a noticeable reduction in unpleasant smells during daily drives or longer trips.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this filter reduce odors and harmful gases?\u003c\/h3\u003e\n\n\u003cp\u003eThe C3640WS adds an activated charcoal (carbon) layer to the typical particulate media. Carbon adsorbs volatile molecules such as ozone, nitrogen oxides, sulfur dioxide and hydrocarbons, removing them from the cabin airflow rather than only trapping solid particles.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eActivated carbon layer chemically binds odorous and gaseous contaminants.\u003c\/li\u003e\n  \u003cli\u003eAdditional cover layers protect the carbon and prolong adsorption effectiveness.\u003c\/li\u003e\n  \u003cli\u003eHigh pleat count increases media area so gases contact more carbon surface.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat particle filtration performance can I expect?\u003c\/h3\u003e\n\n\u003cp\u003eBosch designs this workshop cabin filter to block the vast majority of airborne particles common to road use. With a multi-layer structure including an electrostatically charged microfiber layer, it captures small particulates that can otherwise enter vents and the passenger compartment.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eMulti-layer media provides approximately 99% efficiency at 3 microns or larger.\u003c\/li\u003e\n  \u003cli\u003ePre-filter layer captures larger dust and debris to extend the microfiber layer life.\u003c\/li\u003e\n  \u003cli\u003eElectrostatic microfiber attracts and holds finer particles like pollen and road dust.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill this filter fit my BMW and how is it installed?\u003c\/h3\u003e\n\n\u003cp\u003eThe C3640WS is made to match OE dimensions for select BMW models and model years, but trim or region can affect fit. Check your vehicle’s part number or the seller’s fitment tool before purchase. Installation follows the factory cabin filter access—typically behind the glovebox or under the cowl—so it’s a straightforward replacement for most DIYers or quick for a technician.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eCompatible with numerous BMW 3 Series, M3, X3 and Z3 model years—verify exact fit with vehicle details.\u003c\/li\u003e\n  \u003cli\u003eRigid frame and foam perimeter (where specified) prevent bypass and maintain proper seal.\u003c\/li\u003e\n  \u003cli\u003eStandard replacement procedure: remove cover, extract old filter, insert new filter with correct orientation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does construction affect longevity and service life?\u003c\/h3\u003e\n\n\u003cp\u003eBuild quality — pleat count, frame rigidity and gasket sealing — matters for consistent performance over time. Bosch’s multi-layer assembly and optional structural features resist deformation and reduce particle bypass, which helps the filter perform closer to its rated efficiency throughout its service interval.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eHigh pleat density increases usable media area for sustained filtration capacity.\u003c\/li\u003e\n  \u003cli\u003eRigid frame options hold shape under airflow and installation forces.\u003c\/li\u003e\n  \u003cli\u003eFoam perimeter gasket (where included) stops unfiltered air from sneaking around the media.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: Drivers of compatible BMW models who want more than basic particulate removal — especially those bothered by road odors, smog-related smells or frequent pollen and dust — will benefit from this Bosch activated charcoal cabin air filter. It’s suited for routine maintenance intervals, owners seeking improved in-cabin comfort, and workshops installing a direct-fit, higher-performance replacement part.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Does the Bosch C3640WS remove vehicle odors?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. Its activated charcoal layer adsorbs volatile odors and gases, reducing smells that particulate-only filters don’t capture.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: How often should I replace this cabin filter?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Replace according to your vehicle manufacturer’s interval or sooner in high-pollution areas; typically every 12,000–24,000 miles or annually.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Bosch","offers":[{"title":"Default Title","offer_id":48086803775646,"sku":"B00D0HZ22Q","price":55.72,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/bosch-c3640ws-front-packaging.jpg?v=1785905768","url":"https:\/\/northtrailauto.ca\/products\/bosch-cabin-air-filter-for-bmw-3-series-m3-x3-z3-c3640ws-activated-charcoal-multi-layer-99-at-3%c2%b5m","provider":"North Trail Auto","version":"1.0","type":"link"}