{"product_id":"atp-parts-b-449-transmission-filter-kit","title":"ATP Parts B-449 Transmission Filter Kit","description":"\u003ch2\u003eTransmission Filter Kit Overview\u003c\/h2\u003e\u003cp\u003eATP Parts B-449 is a transmission filter kit for BMW applications that need clean fluid flow through the transmission. It is built to help keep debris from circulating through the valve body and other internal components, reducing the risk of clogging and wear.\u003c\/p\u003e\u003cp\u003eCompatible With BMW M3, M4, M5, M6, M6 Gran Coupe, Z4, 135i, 135is, and 335is applications across the listed model years. This part number, B-449, is a direct fit service solution for BMW transmission maintenance.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eTransmission filter kit for routine service and fluid filtration.\u003c\/li\u003e\n\u003cli\u003eHelps keep transmission fluid cleaner as wear debris accumulates.\u003c\/li\u003e\n\u003cli\u003eSupports proper flow through the valve body and related internal parts.\u003c\/li\u003e\n\u003cli\u003eFits BMW performance and luxury models across multiple model years.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Product Information\u003c\/h2\u003e\u003cp\u003eATP Parts B-449 is intended for transmission service where maintaining clean fluid is critical to internal transmission operation. As debris builds up from normal use, the filter helps trap contaminants before they can restrict passages or interfere with valve body function. For BMW owners servicing a BMW M3, BMW M4, or BMW Z4, this filter kit provides a maintenance-focused replacement that supports transmission longevity. The B-449 part number is also useful when cross-referencing service needs for the same application.\u003c\/p\u003e\u003ch2\u003eCommon Issues This Part Addresses\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eDirty transmission fluid from normal wear and tear.\u003c\/li\u003e\n\u003cli\u003eRestricted fluid flow caused by trapped debris.\u003c\/li\u003e\n\u003cli\u003eClogging in the valve body or related internal passages.\u003c\/li\u003e\n\u003cli\u003eIncreased wear from contaminated transmission fluid.\u003c\/li\u003e\n\u003cli\u003eCostly repairs linked to neglected transmission filtration.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eUse this filter during transmission service and follow the vehicle manufacturer’s service procedure for fluid replacement and inspection. Confirm the application by year, model, and notes before ordering, especially for BMW Z4 listings marked as sump filter. Verify the part number B-449 against the vehicle’s transmission service requirements.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eATP Parts designs transmission filters to keep transmission fluid clean and to help protect internal components from debris-related damage. This part cross-references BMW (e.g., 28 10 7 842 828) for the same application.\u003c\/p\u003e","brand":"ATP Parts","offers":[{"title":"Default Title","offer_id":53657730613429,"sku":"BBFB-B-449","price":83.22,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/AT_B449_Fro.jpg?v=1793601404","url":"https:\/\/www.partcatalog.com\/products\/atp-parts-b-449-transmission-filter-kit","provider":"PartCatalog","version":"1.0","type":"link"}