51 42 018 Replacing speaker frame on rear left or right door trim panel: Notes
WARNING: This page is about a different car, the 2003 BMW X5, 2002 BMW X5, 2001 BMW X5, and 2000 BMW X5. However, it is still accessible from the selected car via links, so may be relevant.
Remove rear door trim panel. See 51 42 000 Removing And Installing Rear Left Or Right Door Trim Panel .
Release plastic welded joints (1) and remove speaker frame (2).