{"product_id":"westar-st-3921-suspension-strut-mount-rear","title":"Westar ST-3921 Suspension Strut Mount - Rear","description":"\u003ch2\u003eSuspension Strut Mount for BMW Rear Fitment\u003c\/h2\u003e\u003cp\u003eWestar ST-3921 is a suspension strut mount built for rear applications on select BMW 5 Series models. It provides the mounting interface that helps the strut assembly rotate correctly, reduce road noise, and maintain suspension geometry.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eProvides a pivot point for suspension movement to support steering response and reduce uneven tire and component wear.\u003c\/li\u003e\n\u003cli\u003eLocks the strut and body together for secure mounting.\u003c\/li\u003e\n\u003cli\u003eIncludes a noise-dampening function to reduce vibration transfer into the cabin.\u003c\/li\u003e\n\u003cli\u003eFinished to help protect the mount and maintain appearance over time.\u003c\/li\u003e\n\u003cli\u003eWestar ST-3921 is built with application-specific materials for the intended fitment.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Description\u003c\/h2\u003e\u003cp\u003eThis suspension strut mount is engineered for rear use on compatible BMW 525i, 530i, 540i, and 528i applications. Fits 2001-2003 BMW 525i, rear; Fits 2001-2003 BMW 530i, rear, exc elec adj suspension; Fits 1999-2003 BMW 540i, rear; Fits 1998-2000 BMW 528i, rear; Fits 1997-1998 BMW 540i, rear, exc elec adj suspension; Fits 1996 BMW 528i, rear, Exc Elec Adj Suspension. The mount helps isolate vibration while keeping the strut assembly properly located, which is important for consistent suspension operation on BMW 5 Series vehicles. Part number ST-3921 is also referenced by several aftermarket brands for the same application.\u003c\/p\u003e\u003ch2\u003eWhat It Is Used For\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eReducing suspension noise transmitted through the body.\u003c\/li\u003e\n\u003cli\u003eMaintaining proper strut alignment and rotation.\u003c\/li\u003e\n\u003cli\u003eSupporting stable suspension geometry during driving.\u003c\/li\u003e\n\u003cli\u003eAddressing worn or noisy upper strut mounting points.\u003c\/li\u003e\n\u003cli\u003eRestoring secure strut-to-body attachment.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eVerify rear suspension configuration before ordering, especially on 530i, 540i, and 528i models with electronic adjustable suspension exclusions noted in fitment. Compare the original mount and suspension layout to confirm application match. Professional installation is recommended for proper suspension service and alignment checks after replacement.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eWestar states that it uses high-quality materials and a protective finish to support durability and appearance. Part number ST-3921 cross-references Monroe Shocks \u0026amp; Struts 903921 for the same application.\u003c\/p\u003e","brand":"Westar","offers":[{"title":"Default Title","offer_id":53396517781685,"sku":"DKJQ-ST-3921","price":34.92,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/WS_ST3921_Fro.jpg?v=1790664240","url":"https:\/\/www.partcatalog.com\/products\/westar-st-3921-suspension-strut-mount-rear","provider":"PartCatalog","version":"1.0","type":"link"}