Delphi TC4538 Lateral Arm - Rear Left Upper Forward

OE-Style Rear Left Upper Forward Lateral Arm

Delphi 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.

Key Features

• Stamped steel lateral arm with a straight shape
• Black painted finish with matte appearance
• Rubber bushings included at both ends
• Standard replacement grade for OE-style service
• Rear left upper forward position
• Not adjustable and not greaseable
• Delphi TC4538 for BMW rear suspension repair

Detailed Description

Delphi 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.

Compatible 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.

Common Repair Uses

• Rear suspension noise from worn bushings
• Loose or inconsistent rear-end handling
• Alignment issues tied to a worn lateral arm
• Uneven tire wear caused by suspension play
• Restoring rear suspension geometry after component wear

Installation Notes

Install 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.

Quality Assurance

Delphi 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.