WARNING: This page is about a different car, the 2025 BMW M4, 2024 BMW M4, 2023 BMW M4, 2022 BMW M4, and 2021 BMW M4. However, it is still accessible from the selected car via links, so may be relevant.
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ACC adjustment device. With this adjustment device, an ACC sensor installed in the vehicle can be adjusted in the workshop. Will be replaced by 83 30 5 A40 812 from 11/2021.