52 17 060 Removing and installing/replacing valve housing for lumbar cushion (comfort)
WARNING: This page is about a different car, the 2010 BMW 535xi, 2009 BMW 535xi, and 2008 BMW 535xi. However, it is still accessible from the selected car via links, so may be relevant.
This operation is identical to:
Replacing VALVE HOUSING FOR LUMBAR CUSHION (normal/electric).