61 35 900 Removing And Installing/Replacing Ring Antenna Of Electronic Immobilizer
WARNING: This page is about a different car, the 2007 BMW 550i and 2006 BMW 550i. However, it is still accessible from the selected car via links, so may be relevant.
Special tools required:
Necessary preliminary tasks:
Disconnect plug connection (1).
Position special tool 61 3 300 as illustrated with flattened side (A) to ring antenna of electronic immobilizer (2).
Lever out ring antenna of electronic immobilizer (2) in direction of arrow and remove.