{"product_id":"dorman-521-585-suspension-control-arm-and-ball-joint-assembly-rear-left-upper-forward","title":"Dorman 521-585 Suspension Control Arm and Ball Joint Assembly - Rear Left Upper Forward","description":"\u003ch2\u003eDorman 521-585 Rear Left Upper Forward Control Arm\u003c\/h2\u003e\u003cp\u003eDorman 521-585 is a direct replacement suspension control arm and ball joint assembly for specific BMW applications. It is built for the rear left upper forward position and is engineered to restore smooth ride quality, directional stability, and predictable handling on BMW X5 and BMW X6 models.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eDirect replacement for the original equipment control arm and ball joint assembly\u003c\/li\u003e\n\u003cli\u003eFits the rear left upper forward suspension position\u003c\/li\u003e\n\u003cli\u003eAluminum control arm construction for a lightweight OE-style design\u003c\/li\u003e\n\u003cli\u003eBall joint is included and installed with a threaded stud type\u003c\/li\u003e\n\u003cli\u003ePre-greased assembly with rubber bushings\u003c\/li\u003e\n\u003cli\u003ePress-in ball joint mounting type with mounting hardware included\u003c\/li\u003e\n\u003cli\u003eBlack finish and casting\/forged control arm type\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Description\u003c\/h2\u003e\u003cp\u003eThis Dorman suspension control arm and ball joint assembly is built for BMW X5 and BMW X6 rear suspension service where the original arm has worn bushings, loosened ball joint movement, or developed handling noise. The aluminum arm, rubber bushings, and pre-greased ball joint are selected to match the needs of light-duty suspension service while supporting consistent alignment behavior. Dorman 521-585 is a practical OE-style replacement for the rear left upper forward position on 2007-2018 BMW X5 and 2008-2019 BMW X6 applications.\u003c\/p\u003e\u003cp\u003eThis part cross-references MOOG Chassis Products RK621119 for the same application.\u003c\/p\u003e\u003ch2\u003eCommon Repair Symptoms\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eClunking or knocking from the rear suspension\u003c\/li\u003e\n\u003cli\u003eUneven tire wear caused by worn suspension geometry\u003c\/li\u003e\n\u003cli\u003eLoose or unstable rear-end handling\u003c\/li\u003e\n\u003cli\u003eExcessive play from a worn ball joint or bushing\u003c\/li\u003e\n\u003cli\u003eAlignment issues after suspension wear\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eVerify the rear left upper forward position before ordering, since this assembly is application-specific. Inspect adjacent suspension components, fasteners, and alignment settings during replacement. Because the ball joint is press-in and the assembly includes mounting hardware, proper suspension service tools and a post-installation alignment check are recommended after installation on BMW X5 and BMW X6 models.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eDorman uses an industry-leading evaluation process to help ensure the replacement assembly delivers the ride quality, directional stability, and predictable dynamics expected from an OE-style suspension component.\u003c\/p\u003e","brand":"Dorman","offers":[{"title":"Default Title","offer_id":52752775938229,"sku":"BKKY-521-585","price":101.16,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/RB_521585_Fro.jpg?v=1782887020","url":"https:\/\/www.partcatalog.com\/products\/dorman-521-585-suspension-control-arm-and-ball-joint-assembly-rear-left-upper-forward","provider":"PartCatalog","version":"1.0","type":"link"}