{"product_id":"spl-parts-2010-bmw-f2x-2-series-2011-bmw-f3-x-3-4-series-rear-traction-arm-knuckle-bushing","title":"SPL Parts Rear Traction Arm Knuckle Bushings for BMW F2X\/F3X","description":"\u003ch4\u003eReplace rear suspension deflection with a precise spherical joint\u003c\/h4\u003e\u003cp\u003eSPL RKB F3X replaces the compliant factory rear traction-arm knuckle bushings on supported BMW F2X and F3X chassis with low-friction, PTFE-lined spherical bearings. The change reduces bind through suspension travel and limits bushing movement under load while retaining a housing sized for the original knuckle location.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eSPL RKB F3X is supplied as a matched pair for one vehicle\u003c\/li\u003e\n\u003cli\u003eLow-friction, PTFE-lined spherical bearings\u003c\/li\u003e\n\u003cli\u003eLarge FK bearing selected to support service life and control noise, vibration, and harshness\u003c\/li\u003e\n\u003cli\u003e6061-T6 aluminum bearing housings\u003c\/li\u003e\n\u003cli\u003eCNC-machined to a stated tolerance of plus or minus 0.001 inch\u003c\/li\u003e\n\u003cli\u003eReplaces BMW part number 3336792551\u003c\/li\u003e\n\u003cli\u003eMade in the USA\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eApplication details and restrictions\u003c\/h4\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eYears\u003c\/th\u003e\n\u003cth\u003eMake\u003c\/th\u003e\n\u003cth\u003eApplication\u003c\/th\u003e\n\u003cth\u003eChassis\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e2010-2019\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eSupported 1 Series and 2 Series applications\u003c\/td\u003e\n\u003ctd\u003eF20, F21, F22, F23\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2011-2019\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eSupported 3 Series and 4 Series applications\u003c\/td\u003e\n\u003ctd\u003eF30, F31, F32, F33, F34, F35, F36\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003eConfirm the chassis, model year, and rear traction-arm-to-knuckle bushing location before ordering. This pair replaces the lower-control-arm bushing at the rear knuckle and is not a complete rear suspension bushing kit.\u003c\/p\u003e\u003ch4\u003eSpecifications\u003c\/h4\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer Part Number\u003c\/td\u003e\n\u003ctd\u003eSPL RKB F3X\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eRear traction-arm knuckle bushing pair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePosition\u003c\/td\u003e\n\u003ctd\u003eRear knuckle\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBearing\u003c\/td\u003e\n\u003ctd\u003ePTFE-lined FK spherical bearing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHousing Material\u003c\/td\u003e\n\u003ctd\u003e6061-T6 aluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMachining Tolerance\u003c\/td\u003e\n\u003ctd\u003ePlus or minus 0.001 inch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReplaces BMW Number\u003c\/td\u003e\n\u003ctd\u003e3336792551\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCountry of Manufacture\u003c\/td\u003e\n\u003ctd\u003eUnited States\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch4\u003eWhat's Included\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eOne pair of SPL RKB F3X rear traction-arm knuckle bushing assemblies\u003c\/li\u003e\n\u003cli\u003eTwo installed spherical bearings and application-specific inner sleeves as pictured by SPL Parts\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eAbout SPL Parts\u003c\/h4\u003e\u003cp\u003eSPL Parts develops precision suspension hardware for street, track, and motorsport use. Its spherical-bearing components are designed to reduce unwanted compliance while preserving suspension articulation in the supported factory mounting location.\u003c\/p\u003e\u003ch4\u003eRelated Parts\u003c\/h4\u003e\u003cul\u003e\u003cli\u003eNo related product is linked because rear arms, toe links, and alignment hardware must match the exact BMW chassis and suspension configuration.\u003c\/li\u003e\u003c\/ul\u003e\u003ch4\u003eFAQ\u003c\/h4\u003e\u003cstrong\u003eWhat is the SPL RKB F3X?\u003c\/strong\u003e\u003cp\u003eIt is a pair of spherical-bearing bushings for the supported BMW rear traction-arm-to-knuckle mounting location.\u003c\/p\u003e\u003cstrong\u003eHow many bushings are included?\u003c\/strong\u003e\u003cp\u003eSPL Parts supplies the product as a pair for one vehicle.\u003c\/p\u003e\u003cstrong\u003eWhat factory component does it replace?\u003c\/strong\u003e\u003cp\u003eIt replaces the rubber bushing that connects the lower control arm or traction arm to the rear knuckle, including BMW reference number 3336792551.\u003c\/p\u003e\u003cstrong\u003eWill it fit every BMW F-series chassis?\u003c\/strong\u003e\u003cp\u003eNo. Fitment is limited to the listed F20 through F23 and F30 through F36 chassis and supported model years.\u003c\/p\u003e\u003cstrong\u003eWhy use a spherical bearing here?\u003c\/strong\u003e\u003cp\u003eThe spherical joint reduces rubber-bushing deflection and bind as the suspension moves under load.\u003c\/p\u003e\u003cstrong\u003eWhat is the housing made from?\u003c\/strong\u003e\u003cp\u003eThe housing is CNC-machined from 6061-T6 aluminum.\u003c\/p\u003e\u003cstrong\u003eIs the product sold as a complete rear bushing kit?\u003c\/strong\u003e\u003cp\u003eNo. It is the pair for the rear traction-arm knuckle location only.\u003c\/p\u003e\u003cstrong\u003eShould the vehicle be aligned after installation?\u003c\/strong\u003e\u003cp\u003eInspect rear alignment after installation and complete a professional alignment when measurements are outside the vehicle manufacturer's specifications.\u003c\/p\u003e\u003ch4\u003eInstallation Instructions\u003c\/h4\u003e\u003col\u003e\n\u003cli\u003eConfirm the BMW chassis, model year, mounting location, and SPL RKB F3X before disassembly.\u003c\/li\u003e\n\u003cli\u003eReview the current SPL Parts guidance and the applicable BMW service procedure for rear suspension removal, support points, and fastener replacement.\u003c\/li\u003e\n\u003cli\u003eSupport the vehicle and suspension safely, then remove only the components required to access the rear traction-arm knuckle bushing.\u003c\/li\u003e\n\u003cli\u003eUse correctly sized press tooling so removal and installation loads do not pass through or damage the spherical bearing.\u003c\/li\u003e\n\u003cli\u003eReassemble with serviceable hardware and tighten fasteners using the current BMW torque procedure for the exact vehicle.\u003c\/li\u003e\n\u003cli\u003eVerify bearing articulation, wheel and brake clearance, suspension travel, and rear alignment before road use.\u003c\/li\u003e\n\u003c\/ol\u003e\u003cp\u003e\u003cstrong\u003eCalifornia Proposition 65 Warning:\u003c\/strong\u003e Cancer and reproductive harm - www.P65Warnings.ca.gov.\u003c\/p\u003e","brand":"SPL Parts","offers":[{"title":"Default Title","offer_id":68154563592271,"sku":"SPPSPL RKB F3X","price":147.1,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1062\/7920\/files\/spl-parts-spl-rkb-f3x-rear-knuckle-bushings-01.webp?v=1794613775","url":"https:\/\/www.blackopsautoworks.com\/products\/spl-parts-2010-bmw-f2x-2-series-2011-bmw-f3-x-3-4-series-rear-traction-arm-knuckle-bushing","provider":"Black Ops Auto Works","version":"1.0","type":"link"}