{"product_id":"delphi-tc4538-lateral-arm-rear-left-upper-forward","title":"Delphi TC4538 Lateral Arm - Rear Left Upper Forward","description":"\u003ch2\u003eOE-Style Rear Left Upper Forward Lateral Arm\u003c\/h2\u003e\u003cp\u003eDelphi TC4538 is a rear left upper forward lateral arm built for BMW suspension service where precise alignment and stable rear suspension geometry matter. It uses a stamped steel construction with rubber bushings and a painted black finish for a direct replacement approach on select BMW 530i, 540i, 740i, M5, and related models.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eStamped steel lateral arm with a straight shape\u003c\/li\u003e\n\u003cli\u003eBlack painted finish with matte appearance\u003c\/li\u003e\n\u003cli\u003eRubber bushings included at both ends\u003c\/li\u003e\n\u003cli\u003eStandard replacement grade for OE-style service\u003c\/li\u003e\n\u003cli\u003eRear left upper forward position\u003c\/li\u003e\n\u003cli\u003eNot adjustable and not greaseable\u003c\/li\u003e\n\u003cli\u003eDelphi TC4538 for BMW rear suspension repair\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Description\u003c\/h2\u003e\u003cp\u003eDelphi TC4538 is engineered as a suspension lateral arm for the rear left upper forward location. The steel, stamped construction supports consistent fitment, while the rubber bushings help isolate road vibration in everyday driving. Delphi applies OE-focused dimensional and material analysis to help match the original part profile, and its testing includes exposure to extreme temperatures and extended salt-spray conditions to evaluate durability in demanding environments. This part cross-references Suspensia X05LA0397 for the same application.\u003c\/p\u003e\u003cp\u003eCompatible With select BMW rear suspension applications including 2017-2024 BMW 530i, 2017-2024 BMW 530i xDrive, 2017-2024 BMW 540i xDrive, 2020-2024 BMW 840i, 2022-2024 BMW M8, 2018-2023 BMW 530e, 2018-2023 BMW 530e xDrive, 2018-2023 BMW M5, and 2016-2022 BMW 740i. Delphi TC4538 is also used on additional BMW 7 Series, 8 Series, and M Performance models listed in the fitment data.\u003c\/p\u003e\u003ch2\u003eCommon Repair Uses\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eRear suspension noise from worn bushings\u003c\/li\u003e\n\u003cli\u003eLoose or inconsistent rear-end handling\u003c\/li\u003e\n\u003cli\u003eAlignment issues tied to a worn lateral arm\u003c\/li\u003e\n\u003cli\u003eUneven tire wear caused by suspension play\u003c\/li\u003e\n\u003cli\u003eRestoring rear suspension geometry after component wear\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\u003cp\u003eInstall in the rear left upper forward position only. Verify mounting hole diameter, bushing dimensions, and vehicle application before installation. Because this arm is not adjustable, final alignment should be checked after replacement. Mounting hardware is not included, so reuse or source the correct hardware as required by the vehicle service procedure.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eDelphi uses OE-based engineering and validation methods for its steering and suspension components. TC4538 is built with dimensional and material analysis to support proper OE-to-aftermarket compatibility, and it is tested across extreme temperature ranges and salt-spray exposure to evaluate durability.\u003c\/p\u003e","brand":"Delphi","offers":[{"title":"Default Title","offer_id":52435695206581,"sku":"BBMX-TC4538","price":153.3,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/DE_TC4538_FRO.jpg?v=1777862243","url":"https:\/\/www.partcatalog.com\/products\/delphi-tc4538-lateral-arm-rear-left-upper-forward","provider":"PartCatalog","version":"1.0","type":"link"}