Partially removing the right engine ventilation line
WARNING: This page is about a different car, the 2022 BMW X7, 2021 BMW X7, 2020 BMW X7, and 2019 BMW X7. However, it is still accessible from the selected car via links, so may be relevant.
Unlock the retaining clip (1)
upwards using a suitable screwdriver.
Feed out the right engine ventilation line (2) to the rear.