{"product_id":"dorman-521-397-suspension-control-arm","title":"Dorman 521-397 Suspension Control Arm - Rear Left Lower","description":"\u003ch2\u003eDurable Suspension Control Arm for BMW 525i, 528i, 530i, 540i\u003c\/h2\u003e\u003cp\u003eThe Dorman 521-397 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 is a direct replacement part that helps maintain your vehicle's suspension integrity.\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\u003eOverall length of 262.5 mm ensures proper fitment and alignment\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\u003ePress-in end type with bushing linkage end for secure installation\u003c\/li\u003e\n\u003cli\u003eRegular grade type, non-adjustable design for consistent suspension geometry\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eThis suspension control arm is crafted using a casting and forging process to balance strength and durability while minimizing weight. The aluminum material offers corrosion resistance and contributes to improved vehicle handling. The included rubber bushing helps absorb road vibrations and reduce noise, enhancing ride comfort. Although the ball joint is not included, the welded mounting design allows for easy installation of compatible ball joints. The black coated finish protects the arm from environmental wear, extending its service life.\u003c\/p\u003e\u003ch2\u003eCompatible Vehicles and Applications\u003c\/h2\u003e\u003cp\u003eThis Dorman suspension control arm is compatible with BMW 525i, 528i, 530i, and 540i models. It is designed to replace the original equipment part, restoring proper suspension function and alignment. The part number 521-397 ensures you receive the correct component for these specific BMW vehicles.\u003c\/p\u003e\u003ch2\u003eCommon Suspension Issues Addressed\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eWorn or damaged control arm bushings causing steering instability\u003c\/li\u003e\n\u003cli\u003eCorroded or bent control arms affecting wheel alignment\u003c\/li\u003e\n\u003cli\u003eExcessive vibration or noise from suspension components\u003c\/li\u003e\n\u003cli\u003eLoose or failing ball joint mounts (ball joint replacement required separately)\u003c\/li\u003e\n\u003cli\u003eUneven tire wear due to suspension misalignment\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eEnsure vehicle is securely lifted and supported before removal\u003c\/li\u003e\n\u003cli\u003eRemove old control arm and inspect ball joint and mounting hardware\u003c\/li\u003e\n\u003cli\u003eReplace bushings if worn or damaged; note that ball joint is not included with this part\u003c\/li\u003e\n\u003cli\u003eTorque all fasteners to manufacturer specifications for safety and performance\u003c\/li\u003e\n\u003cli\u003eWheel alignment is recommended after installation to maintain proper handling\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eQuality Assurance and Warranty\u003c\/h2\u003e\u003cp\u003eDorman suspension control arms are manufactured to meet or exceed OEM standards for fit, form, and function. The 521-397 part undergoes rigorous quality checks to ensure durability and reliability. While specific warranty details may vary, Dorman typically offers a limited warranty covering defects in materials and workmanship to provide confidence in your purchase.\u003c\/p\u003e","brand":"Dorman","offers":[{"title":"Default Title","offer_id":43997165748405,"sku":"BKKY-521-397","price":171.15,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/RB_521397_Fro.jpg?v=1775007852","url":"https:\/\/www.partcatalog.com\/products\/dorman-521-397-suspension-control-arm","provider":"PartCatalog","version":"1.0","type":"link"}