{"product_id":"dorman-521-099-suspension-control-arm-and-ball-joint-assembly-front-left-upper","title":"Dorman 521-099 Suspension Control Arm and Ball Joint Assembly - Front Left Upper","description":"\u003ch2\u003eDorman 521-099 Front Left Upper Control Arm\u003c\/h2\u003e\u003cp\u003eDorman 521-099 is a direct replacement suspension control arm and ball joint assembly for select Lexus applications. It is built for the front left upper position and is engineered to restore smooth ride quality, directional stability, and predictable handling on compatible Lexus IS models.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eDirect replacement for the original equipment front left upper control arm assembly\u003c\/li\u003e\n\u003cli\u003ePre-greased for immediate service readiness\u003c\/li\u003e\n\u003cli\u003eBall joint is included and already installed\u003c\/li\u003e\n\u003cli\u003ePress-in ball joint design with threaded stud\u003c\/li\u003e\n\u003cli\u003eSteel stamped control arm with rubber bushings\u003c\/li\u003e\n\u003cli\u003eMounting hardware included\u003c\/li\u003e\n\u003cli\u003eBlack finish for a clean OE-style appearance\u003c\/li\u003e\n\u003cli\u003ePart number: 521-099\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Description\u003c\/h2\u003e\u003cp\u003eThis suspension control arm and ball joint assembly is built with a stamped steel arm, rubber bushings, and a press-in ball joint to match the original layout on specific Lexus front suspension applications. Dorman 521-099 is pre-greased and supplied with the ball joint installed, helping simplify replacement of worn upper control arm components. It is a regular-grade, light-duty suspension component intended for the front left upper position on Lexus IS300, IS350, IS200t, IS250, and IS F models listed below. This part cross-references MOOG Chassis Products RK622662 for the same application.\u003c\/p\u003e\u003ch2\u003eVehicle Fitment\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eFits 2018-2020 Lexus IS300, front left upper\u003c\/li\u003e\n\u003cli\u003eFits 2006-2020 Lexus IS350, front left upper\u003c\/li\u003e\n\u003cli\u003eFits 2016-2017 Lexus IS200t, front left upper\u003c\/li\u003e\n\u003cli\u003eFits 2006-2015 Lexus IS250, front left upper\u003c\/li\u003e\n\u003cli\u003eFits 2008-2014 Lexus IS F, front left upper\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCommon Problems This Part Can Address\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eClunking or knocking from the front suspension\u003c\/li\u003e\n\u003cli\u003eExcessive play from a worn upper control arm ball joint\u003c\/li\u003e\n\u003cli\u003eUneven tire wear related to suspension looseness\u003c\/li\u003e\n\u003cli\u003eSteering wander or reduced directional stability\u003c\/li\u003e\n\u003cli\u003eHarsh or inconsistent front-end ride behavior\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eInstall this assembly in the front left upper position only on the listed Lexus applications. Because the ball joint is press-in and already installed, replacement typically focuses on removing the worn assembly and transferring the mounting points to the vehicle suspension. Verify alignment after installation, since upper control arm replacement can affect camber and caster settings. Confirm fitment by year, model, and position before ordering; Dorman 521-099 is listed for specific Lexus IS300, IS350, IS200t, IS250, and IS F vehicles.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eDorman uses an industry-focused evaluation process to verify fit, function, and suspension performance characteristics. That process supports OE-style replacement quality for Lexus front suspension service and helps maintain smooth ride control and predictable dynamics.\u003c\/p\u003e","brand":"Dorman","offers":[{"title":"Default Title","offer_id":52752772366517,"sku":"BKKY-521-099","price":77.7,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/RB_521099_Fro.jpg?v=1782886880","url":"https:\/\/www.partcatalog.com\/products\/dorman-521-099-suspension-control-arm-and-ball-joint-assembly-front-left-upper","provider":"PartCatalog","version":"1.0","type":"link"}