Removal & Installation (7-Series)
WARNING: This page does not describe the selected car, but rather 82 other vehicles, including the 2006 BMW M3, 2006 BMW 330Ci, 2006 BMW 325Ci, 2005 BMW M3, and 2005 BMW 745i. However, it is still accessible from the selected car via links, so may be relevant.
Remove left rear wheel. Remove left rear wheel trim. Remove return line. See Fig 1. Unscrew and lower expansion tank. See Fig 2. Disconnect connections No. 1 and 2. See Fig 3. Unclip lines in front of tank. See Figure. Loosen lines to activated carbon filter at expansion tank. Remove expansion tank.