{"product_id":"dorman-521-218-suspension-control-arm-and-ball-joint-assembly","title":"Dorman 521-218 Suspension Control Arm and Ball Joint Assembly - Rear Right Upper Rearward","description":"\u003ch2\u003eDurable Suspension Control Arm and Ball Joint Assembly\u003c\/h2\u003e\u003cp\u003eThe Dorman 521-218 suspension control arm and ball joint assembly is engineered for reliable performance in BMW 525i, 528i, 530i, 540i, and M5 models. Designed with pre-greased components and included bushings, this assembly ensures smooth suspension operation and long-lasting durability.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003ePre-greased for immediate use and reduced maintenance\u003c\/li\u003e\n\u003cli\u003eIncludes rubber bushings and mounting hardware for a complete installation\u003c\/li\u003e\n\u003cli\u003eThreaded ball joint stud with a 14 mm thread diameter\u003c\/li\u003e\n\u003cli\u003eConstructed from durable steel with a black finish\u003c\/li\u003e\n\u003cli\u003eDesigned for light suspension grade applications\u003c\/li\u003e\n\u003cli\u003ePressed attachment type with one mounting hole (12.3 mm diameter)\u003c\/li\u003e\n\u003cli\u003eControl arm dimensions: maximum width 288.5 mm, maximum length 237 mm\u003c\/li\u003e\n\u003cli\u003eBall joint installed and included for convenience\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eProduct Details and Specifications\u003c\/h2\u003e\u003cp\u003eThis Dorman suspension control arm and ball joint assembly (part number 521-218) is crafted from forged and cast steel to provide strength and stability for BMW vehicles including the 525i, 528i, 530i, 540i, and M5. The assembly comes pre-greased, eliminating the need for initial lubrication and helping to extend the lifespan of the ball joint. Rubber bushings are included to absorb vibrations and reduce noise, contributing to a smoother ride. The control arm features a single mounting hole with a diameter of 12.3 mm and a threaded ball joint stud, ensuring secure attachment and compatibility with factory suspension components.\u003c\/p\u003e\u003ch2\u003eCompatible BMW Models and Applications\u003c\/h2\u003e\u003cp\u003eThis suspension control arm and ball joint assembly is compatible with the following BMW models:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eBMW 525i\u003c\/li\u003e\n\u003cli\u003eBMW 528i\u003c\/li\u003e\n\u003cli\u003eBMW 530i\u003c\/li\u003e\n\u003cli\u003eBMW 540i\u003c\/li\u003e\n\u003cli\u003eBMW M5\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eIt is designed for light suspension grade use, making it suitable for standard driving conditions and daily use.\u003c\/p\u003e\u003ch2\u003eCommon Suspension Issues Addressed\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 instability or uneven tire wear\u003c\/li\u003e\n\u003cli\u003eCorroded or weakened control arm compromising suspension integrity\u003c\/li\u003e\n\u003cli\u003eLoose or missing mounting hardware affecting suspension alignment\u003c\/li\u003e\n\u003cli\u003eVibration and harshness due to deteriorated suspension components\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eInstallation of the Dorman 521-218 control arm assembly requires basic suspension knowledge and tools. Since the part comes pre-greased and includes bushings and mounting hardware, it simplifies the replacement process. Ensure the vehicle is securely lifted and supported before removal of the old control arm. Verify torque specifications for mounting bolts and ball joint stud to maintain proper suspension geometry. This assembly is not adjustable, so alignment should be checked and corrected after installation.\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. The 521-218 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. Refer to the product documentation for exact warranty terms.\u003c\/p\u003e","brand":"Dorman","offers":[{"title":"Default Title","offer_id":43997046472885,"sku":"BKKY-521-218","price":63.43,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/RB_521218_Fro.jpg?v=1775007822","url":"https:\/\/www.partcatalog.com\/products\/dorman-521-218-suspension-control-arm-and-ball-joint-assembly","provider":"PartCatalog","version":"1.0","type":"link"}