13 74 001 Removing and installing/replacing sound generator (N54)
WARNING: This page is about a different car, the 2010 BMW 135i, 2009 BMW 135i, and 2008 BMW 135i. However, it is still accessible from the selected car via links, so may be relevant.
Necessary preliminary tasks:
Remove intake filter housing
Remove recirculated air hoses.
Unfasten hose clip (1).
Release sound generator from bracket (2) and remove.
Add final details to vehicle.