{"product_id":"dorman-521-301-suspension-control-arm-and-ball-joint-assembly","title":"Dorman 521-301 Suspension Control Arm and Ball Joint Assembly - Front Left Upper","description":"\u003ch2\u003eOverview of Dorman Suspension Control Arm and Ball Joint Assembly\u003c\/h2\u003e\u003cp\u003eThe Dorman 521-301 suspension control arm and ball joint assembly is designed specifically for Mercedes-Benz S430 and S500 models. This pre-greased, iron control arm assembly offers a reliable replacement solution for light suspension grade applications, ensuring proper vehicle handling and suspension performance.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003ePre-greased for immediate installation\u003c\/li\u003e\n\u003cli\u003eIncludes rubber bushings and mounting hardware\u003c\/li\u003e\n\u003cli\u003ePress-in ball joint with threaded stud\u003c\/li\u003e\n\u003cli\u003eConstructed from durable iron with a black finish\u003c\/li\u003e\n\u003cli\u003eCompatible with Mercedes-Benz S430 and S500 models\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Product Description\u003c\/h2\u003e\u003cp\u003eThis Dorman suspension control arm and ball joint assembly (part number 521-301) features a casting\/forged iron control arm designed for light suspension grade use. The assembly comes pre-greased, eliminating the need for additional lubrication during installation. It includes rubber bushings to help absorb road vibrations and reduce noise, along with all necessary mounting hardware for a straightforward replacement process. The ball joint is press-in mounted and comes installed with a threaded stud, providing secure attachment and reliable steering control. The control arm measures a maximum length of 237 mm and a maximum width of 288.5 mm, with a mounting hole diameter of 12.3 mm, ensuring precise fitment for the specified Mercedes-Benz models.\u003c\/p\u003e\u003ch2\u003eCompatible Vehicles and Applications\u003c\/h2\u003e\u003cp\u003eThis suspension control arm and ball joint assembly is compatible with the following Mercedes-Benz vehicles:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eMercedes-Benz S430\u003c\/li\u003e\n\u003cli\u003eMercedes-Benz S500\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eIt is designed to replace worn or damaged control arms and ball joints, restoring proper suspension geometry and improving vehicle stability.\u003c\/p\u003e\u003ch2\u003eCommon Issues Addressed by This Assembly\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eExcessive suspension noise or clunking\u003c\/li\u003e\n\u003cli\u003eUneven tire wear due to misalignment\u003c\/li\u003e\n\u003cli\u003eLoose or unstable steering feel\u003c\/li\u003e\n\u003cli\u003eVibration or shaking during driving\u003c\/li\u003e\n\u003cli\u003eWorn or damaged control arm bushings and ball joints\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eInstallation of the Dorman 521-301 control arm and ball joint assembly should be performed by a qualified technician. Since the ball joint is pre-installed and the assembly is pre-greased, no additional lubrication is required. Ensure all mounting hardware is securely tightened to manufacturer specifications. Verify alignment after installation to maintain proper suspension geometry and tire wear.\u003c\/p\u003e\u003ch2\u003eQuality Assurance and Warranty\u003c\/h2\u003e\u003cp\u003eDorman suspension components are manufactured to meet or exceed OEM standards for fit, form, and function. This control arm and ball joint assembly undergoes rigorous quality checks to ensure durability and performance. While specific warranty details may vary, Dorman typically offers a limited warranty covering defects in materials and workmanship.\u003c\/p\u003e","brand":"Dorman","offers":[{"title":"Default Title","offer_id":43997076160693,"sku":"BKKY-521-301","price":138.34,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/RB_521301_Fro.jpg?v=1775007836","url":"https:\/\/www.partcatalog.com\/products\/dorman-521-301-suspension-control-arm-and-ball-joint-assembly","provider":"PartCatalog","version":"1.0","type":"link"}