Removing the front upper seat belt

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2023 BMW M5, 2022 BMW M5, 2021 BMW M5, 2020 BMW M5, and 2019 BMW M5. However, it is still accessible from the selected car via links, so may be relevant.

Release the screw (1).
Remove the seat belt guide loop (2).

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Loosen screws (1).
Remove slide bar (2).
Remove safety belt (3).

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Release the screw (1).
Unlock plug connection (2) and disconnect.
Thread out the seat belt retractor (4).
Unscrew the foam part (3).

Courtesy of BMW OF NORTH AMERICA, INC.