Battery in luggage compartment under floor trim panel
WARNING: This page is about a different car, the 2010 BMW X6, 2009 BMW X6, and 2008 BMW X6. However, it is still accessible from the selected car via links, so may be relevant.
Follow instructions for DISCONNECTING AND CONNECTING BATTERY , see 12 00... INSTRUCTIONS FOR DISCONNECTING AND CONNECTING BATTERY .
Fold back floor trim panel (1).
Lift cover (2) on battery negative lead.
Disconnect and cover battery negative lead (3).
Release nuts (4).
Remove battery cover.