{"product_id":"dorman-520-939-suspension-control-arm-and-ball-joint-assembly","title":"Dorman 520-939 Suspension Control Arm and Ball Joint Assembly - Front Left Lower Forward","description":"\u003ch2\u003eDurable Suspension Control Arm and Ball Joint Assembly for BMW 540i and M5\u003c\/h2\u003e\u003cp\u003eThe Dorman 520-939 suspension control arm and ball joint assembly is engineered to restore precise handling and suspension performance for BMW 540i and M5 models. Designed with quality materials and pre-installed components, this assembly offers a reliable replacement solution for your vehicle's suspension system.\u003c\/p\u003e\u003ch2\u003eKey Features of the Dorman 520-939 Control Arm Assembly\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003ePre-greased ball joint for immediate use without additional lubrication\u003c\/li\u003e\n\u003cli\u003eIncludes rubber bushings to reduce vibration and improve ride comfort\u003c\/li\u003e\n\u003cli\u003eAluminum control arm construction for strength and corrosion resistance\u003c\/li\u003e\n\u003cli\u003ePress-in ball joint with threaded stud for secure mounting\u003c\/li\u003e\n\u003cli\u003eMounting hardware included for straightforward installation\u003c\/li\u003e\n\u003cli\u003eCompatible with BMW 540i and M5 suspension systems\u003c\/li\u003e\n\u003cli\u003eControl arm dimensions: maximum width 288.5 mm, maximum length 237 mm\u003c\/li\u003e\n\u003cli\u003eBlack finish for corrosion protection and durability\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Description of the Suspension Control Arm and Ball Joint Assembly\u003c\/h2\u003e\u003cp\u003eThis Dorman suspension control arm and ball joint assembly (part number 520-939) is designed specifically for BMW 540i and M5 vehicles, ensuring proper fit and function. The control arm is made from forged aluminum, providing a balance of lightweight strength and resistance to corrosion. The assembly comes pre-greased, eliminating the need for initial lubrication, and includes rubber bushings that help absorb road shocks and reduce noise. The ball joint is press-in mounted with a threaded stud, allowing for secure attachment and reliable steering response. With mounting hardware included, this assembly simplifies the replacement process and helps restore your vehicle's suspension geometry.\u003c\/p\u003e\u003ch2\u003eCommon Suspension Issues Addressed by This Control Arm Assembly\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eWorn or damaged control arm bushings causing excessive play or noise\u003c\/li\u003e\n\u003cli\u003eBall joint wear leading to steering looseness or uneven tire wear\u003c\/li\u003e\n\u003cli\u003eCorroded or weakened control arm compromising suspension integrity\u003c\/li\u003e\n\u003cli\u003eVibration or instability during cornering or braking\u003c\/li\u003e\n\u003cli\u003eMisalignment issues affecting vehicle handling and tire life\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips for BMW 540i and M5 Owners\u003c\/h2\u003e\u003cp\u003eWhen installing the Dorman 520-939 control arm and ball joint assembly, ensure the vehicle is securely lifted and supported. Remove the old control arm carefully, noting the orientation and mounting points. Since the ball joint is pre-installed and pre-greased, no additional lubrication is necessary before installation. Use the included mounting hardware and torque all fasteners to manufacturer specifications. After installation, a professional wheel alignment is recommended to maintain proper suspension geometry and tire wear.\u003c\/p\u003e\u003ch2\u003eQuality Assurance and Warranty Information\u003c\/h2\u003e\u003cp\u003eDorman manufactures this suspension control arm and ball joint assembly to meet or exceed OEM standards for fit, form, and function. The aluminum control arm and rubber bushings are selected for durability and performance under regular driving conditions. This part is backed by Dorman's limited warranty, providing coverage against defects in materials and workmanship for a specified period. Refer to Dorman's warranty policy for detailed terms and conditions.\u003c\/p\u003e","brand":"Dorman","offers":[{"title":"Default Title","offer_id":43988610547893,"sku":"BKKY-520-939","price":80.52,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/RB_520939_Fro.jpg?v=1775007751","url":"https:\/\/www.partcatalog.com\/products\/dorman-520-939-suspension-control-arm-and-ball-joint-assembly","provider":"PartCatalog","version":"1.0","type":"link"}