{"product_id":"dorman-521-398-suspension-control-arm","title":"Dorman 521-398 Suspension Control Arm - Rear Right Lower","description":"\u003ch2\u003eDurable Suspension Control Arm for BMW 525i, 528i, 530i, 540i\u003c\/h2\u003e\u003cp\u003eThe Dorman 521-398 suspension control arm is engineered to provide reliable performance and precise handling for select BMW models. Designed with quality materials and construction, this control arm supports suspension integrity and vehicle stability.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eConstructed from lightweight aluminum with a coated black finish for corrosion resistance\u003c\/li\u003e\n\u003cli\u003eIncludes a rubber bushing with a black color and precise dimensions (14.3 mm inside diameter, 39.6 mm outside diameter, 92 mm length)\u003c\/li\u003e\n\u003cli\u003eFeatures a welded ball joint mounting type with a threaded stud (ball joint not included)\u003c\/li\u003e\n\u003cli\u003eOverall length of 262.5 mm, designed for press-in end type and bushing linkage end\u003c\/li\u003e\n\u003cli\u003eCompatible with BMW 525i, 528i, 530i, and 540i models\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eThis suspension control arm is manufactured using a casting and forging process to ensure strength and durability. The aluminum material reduces unsprung weight, contributing to improved suspension response. The included rubber bushing helps absorb vibrations and maintain proper alignment, while the coated finish protects against environmental wear. Note that the ball joint and mounting hardware are not included, allowing for customization or reuse of existing components.\u003c\/p\u003e\u003ch2\u003eApplications and Common Issues Addressed\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eRestores proper suspension geometry and alignment on BMW 525i, 528i, 530i, and 540i\u003c\/li\u003e\n\u003cli\u003eReplaces worn or damaged control arms causing uneven tire wear or handling instability\u003c\/li\u003e\n\u003cli\u003eEliminates clunking noises from deteriorated bushings or loose suspension components\u003c\/li\u003e\n\u003cli\u003eImproves steering response and vehicle control by maintaining correct suspension articulation\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eEnsure compatibility with your specific BMW model and year before installation\u003c\/li\u003e\n\u003cli\u003eUse appropriate tools to press in the bushing and secure the control arm\u003c\/li\u003e\n\u003cli\u003eBall joint and mounting hardware must be sourced separately if replacement is needed\u003c\/li\u003e\n\u003cli\u003eProfessional alignment is recommended after installation to maintain suspension geometry\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eQuality Assurance and Warranty\u003c\/h2\u003e\u003cp\u003eDorman suspension components are manufactured to meet or exceed OEM standards for fit and function. The 521-398 control arm undergoes rigorous quality checks to ensure durability and performance. While specific warranty details may vary, Dorman typically offers a limited warranty covering defects in material and workmanship. Refer to official Dorman documentation for exact warranty terms.\u003c\/p\u003e","brand":"Dorman","offers":[{"title":"Default Title","offer_id":43997168533685,"sku":"BKKY-521-398","price":171.15,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/RB_521398_Fro_97cfe26f-6317-43ef-8dde-fcc9050bf03c.jpg?v=1775007852","url":"https:\/\/www.partcatalog.com\/products\/dorman-521-398-suspension-control-arm","provider":"PartCatalog","version":"1.0","type":"link"}