{"product_id":"dorman-520-831-lateral-arm-rear-left-upper-forward","title":"Dorman 520-831 Lateral Arm - Rear Left Upper Forward","description":"\u003ch2\u003eDorman 520-831 Rear Left Upper Forward Lateral Arm\u003c\/h2\u003e\u003cp\u003eDorman 520-831 is a steel lateral arm built for rear suspension service on select BMW applications. It is precision-engineered and tested as a direct replacement for the original equipment part, with a black finish, included bushings, and an installed ball joint for a complete suspension repair.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eSteel construction for suspension strength and durability\u003c\/li\u003e\n\u003cli\u003eStandard replacement grade for OE-style service\u003c\/li\u003e\n\u003cli\u003eBall joint installed with threaded stud design\u003c\/li\u003e\n\u003cli\u003eBushings included for a more complete repair\u003c\/li\u003e\n\u003cli\u003eMounting hardware included\u003c\/li\u003e\n\u003cli\u003eBlack arm and black bushings\u003c\/li\u003e\n\u003cli\u003eNon-adjustable design\u003c\/li\u003e\n\u003cli\u003ePart number: 520-831\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eVehicle Fitment\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eFits 2020-2024 BMW 840i, rear left upper forward.\u003c\/li\u003e\n\u003cli\u003eFits 2020-2024 BMW 840i Gran Coupe, rear left upper forward.\u003c\/li\u003e\n\u003cli\u003eFits 2020-2024 BMW 840i xDrive, rear left upper forward.\u003c\/li\u003e\n\u003cli\u003eFits 2020-2024 BMW 840i xDrive Gran Coupe, rear left upper forward.\u003c\/li\u003e\n\u003cli\u003eFits 2022-2024 BMW Alpina B8 Gran Coupe, rear left upper forward.\u003c\/li\u003e\n\u003cli\u003eFits 2022-2024 BMW M8, rear left upper forward.\u003c\/li\u003e\n\u003cli\u003eFits 2020 BMW M8, rear left upper forward.\u003c\/li\u003e\n\u003cli\u003eFits 2020-2024 BMW M8 Gran Coupe, rear left upper forward.\u003c\/li\u003e\n\u003cli\u003eFits 2019-2024 BMW M850i xDrive, rear left upper forward.\u003c\/li\u003e\n\u003cli\u003eFits 2020-2024 BMW M850i xDrive Gran Coupe, rear left upper forward.\u003c\/li\u003e\n\u003cli\u003eFits 2018-2023 BMW 530e, rear left upper forward.\u003c\/li\u003e\n\u003cli\u003eFits 2018-2023 BMW 530e xDrive, rear left upper forward.\u003c\/li\u003e\n\u003cli\u003eFits 2017-2023 BMW 530i, rear left upper forward.\u003c\/li\u003e\n\u003cli\u003eFits 2017-2023 BMW 530i xDrive, rear left upper forward.\u003c\/li\u003e\n\u003cli\u003eFits 2017-2023 BMW 540i, rear left upper forward.\u003c\/li\u003e\n\u003cli\u003eFits 2017-2023 BMW 540i xDrive, rear left upper forward.\u003c\/li\u003e\n\u003cli\u003eFits 2018-2023 BMW M5, rear left upper forward.\u003c\/li\u003e\n\u003cli\u003eFits 2018-2023 BMW M550i xDrive, rear left upper forward.\u003c\/li\u003e\n\u003cli\u003eFits 2016-2022 BMW 740i, rear left upper forward.\u003c\/li\u003e\n\u003cli\u003eFits 2017-2022 BMW 740i xDrive, rear left upper forward.\u003c\/li\u003e\n\u003cli\u003eFits 2020-2022 BMW 745e, rear left upper forward.\u003c\/li\u003e\n\u003cli\u003eFits 2020-2022 BMW 745e xDrive, rear left upper forward.\u003c\/li\u003e\n\u003cli\u003eFits 2020-2022 BMW 745Le xDrive, rear left upper forward.\u003c\/li\u003e\n\u003cli\u003eFits 2016-2022 BMW 750i xDrive, rear left upper forward.\u003c\/li\u003e\n\u003cli\u003eFits 2016-2022 BMW 750Li xDrive, rear left upper forward.\u003c\/li\u003e\n\u003cli\u003eFits 2017-2022 BMW M760i xDrive, rear left upper forward.\u003c\/li\u003e\n\u003cli\u003eFits 2017-2022 BMW M760Li xDrive, rear left upper forward.\u003c\/li\u003e\n\u003cli\u003eFits 2018-2020 BMW 520i, rear left upper forward.\u003c\/li\u003e\n\u003cli\u003eFits 2018-2019 BMW 640i xDrive Gran Turismo, rear left upper forward.\u003c\/li\u003e\n\u003cli\u003eFits 2017-2019 BMW 740e xDrive, rear left upper forward.\u003c\/li\u003e\n\u003cli\u003eFits 2016-2019 BMW 750i, rear left upper forward.\u003c\/li\u003e\n\u003cli\u003eFits 2016-2019 BMW 750Li, rear left upper forward.\u003c\/li\u003e\n\u003cli\u003eFits 2018 BMW 540d xDrive, rear left upper forward.\u003c\/li\u003e\n\u003cli\u003eFits 2017 BMW 740Le xDrive, rear left upper forward.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWhat It Helps Repair\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eRear suspension looseness or instability\u003c\/li\u003e\n\u003cli\u003eClunking or knocking from the rear suspension area\u003c\/li\u003e\n\u003cli\u003eUneven tire wear caused by worn suspension geometry\u003c\/li\u003e\n\u003cli\u003eExcessive rear-end movement over bumps or during cornering\u003c\/li\u003e\n\u003cli\u003eFailed or worn lateral arm bushings and ball joint wear\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\u003cp\u003eVerify the rear left upper forward position before installation and compare the original arm length, mounting points, and ball joint style to the replacement part. This Dorman 520-831 uses a threaded ball joint stud and a single mounting hole configuration, so confirm the vehicle’s suspension layout and fastener fitment during service. A professional alignment is recommended after suspension component replacement.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eDorman engineers this lateral arm as a direct OE-style replacement and subjects it to testing for reliable service on the listed BMW applications. This part cross-references Beck\/Arnley 102-8370 and Delphi TC4538 for the same application.\u003c\/p\u003e","brand":"Dorman","offers":[{"title":"Default Title","offer_id":52859190214837,"sku":"BKKY-520-831","price":169.58,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/RB_520831_FRO.jpg?v=1784873115","url":"https:\/\/www.partcatalog.com\/products\/dorman-520-831-lateral-arm-rear-left-upper-forward","provider":"PartCatalog","version":"1.0","type":"link"}