52 13 050 Replacing left or right lumbar cushion on front seat (normal/semi-electric)
WARNING: This page is about a different car, the 2013 BMW X5 M, 2012 BMW X5 M, 2011 BMW X5 M, and 2010 BMW X5 M. However, it is still accessible from the selected car via links, so may be relevant.
Operation is identical to:
Replacing LUMBAR CUSHION ON FRONT LEFT OR RIGHT SEAT (normal/electric).