{"product_id":"dorman-966-478-drive-shaft-rear","title":"Dorman 966-478 Drive Shaft - Rear","description":"\u003ch2\u003eDorman 966-478 Drive Shaft for BMW Rear Applications\u003c\/h2\u003e\u003cp\u003eDorman 966-478 is a complete rear drive shaft assembly for select BMW performance sedans and Gran Coupe models. It is pre-balanced for installation and built with all-new yokes, tubes, constant velocity joints, and universal joints to support a direct driveline replacement.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eComplete drive shaft assembly for rear driveline service\u003c\/li\u003e\n\u003cli\u003ePre-balanced for smoother operation after installation\u003c\/li\u003e\n\u003cli\u003e100% new yokes, tubes, CV joints, and universal joints\u003c\/li\u003e\n\u003cli\u003eSteel shaft construction with 0.083 in wall thickness\u003c\/li\u003e\n\u003cli\u003e55.75 in drive shaft length and 2.5 in shaft diameter\u003c\/li\u003e\n\u003cli\u003eBolt-on end 1 and bolt-on end 2 design\u003c\/li\u003e\n\u003cli\u003ePre-greased; grease fitting not included\u003c\/li\u003e\n\u003cli\u003eStandard replacement grade for direct-fit service\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Description\u003c\/h2\u003e\u003cp\u003eThis Dorman drive shaft, part number 966-478, is engineered as a replacement for rear driveline service on 2020-2024 BMW M340i, 2021-2026 BMW M440i, and 2022-2025 BMW M440i Gran Coupe models. The assembly measures 55.75 inches in overall length, with a collapsed length of 55.75 inches flange face to flange face and 29.5 inches yoke to bearing. It uses a steel shaft, bolt-on ends, and a single-piece shaft layout with no slip yoke and no phased configuration.\u003c\/p\u003e\u003cp\u003eFor buyers searching for a BMW M340i rear drive shaft replacement or a BMW M440i Gran Coupe driveline assembly, Dorman 966-478 provides a service-ready option built around new rotating components rather than reusing worn parts. This part cross-references Monroe Shocks \u0026amp; Struts (e.g., 172286, 182286) for the same application.\u003c\/p\u003e\u003ch2\u003eWhat It Helps Fix\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eDriveline vibration from a worn or out-of-balance shaft\u003c\/li\u003e\n\u003cli\u003eClunking or driveline noise from worn universal joints\u003c\/li\u003e\n\u003cli\u003eBinding or rough rotation caused by aging CV joint components\u003c\/li\u003e\n\u003cli\u003eService issues related to damaged yokes or tube wear\u003c\/li\u003e\n\u003cli\u003eRear driveline replacement needs on BMW M340i and M440i applications\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eVerify rear fitment before ordering by matching the vehicle year, model, and driveline configuration. This assembly uses bolt-on ends and is pre-greased, so confirm flange and mounting compatibility during removal and installation. Inspect adjacent driveline components, mounts, and fasteners for wear before completing the repair.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eDorman supplies this drive shaft as a standard replacement assembly built with new core components and pre-balanced for installation. The part number is 966-478.\u003c\/p\u003e","brand":"Dorman","offers":[{"title":"Default Title","offer_id":53013186347189,"sku":"BKKY-966-478","price":838.8,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/RB_966478_FRO.jpg?v=1787550647","url":"https:\/\/www.partcatalog.com\/products\/dorman-966-478-drive-shaft-rear","provider":"PartCatalog","version":"1.0","type":"link"}