Battery in luggage compartment behind side trim panel
WARNING: This page is about a different car, the 2006 BMW X5, 2005 BMW X5, and 2004 BMW X5. However, it is still accessible from the selected car via links, so may be relevant.
Remove side trim panel.
Follow instructions for disconnecting and connecting battery .
disconnect and cover battery negative lead.
Release front side trim panel partly and fold forward.