Cleaning & Inspection
WARNING: This page does not describe the selected car, but rather 43 other vehicles, including the 2006 BMW M3, 2006 BMW 330Ci, 2006 BMW 325Ci, 2005 BMW M3, and 2005 BMW 330xi. However, it is still accessible from the selected car via links, so may be relevant.
Clean components in alcohol and dry with compressed air. Inspect caliper bore and pistons for wear or damage. Replace caliper assembly if cylinder bore is corroded or worn. Do NOT hone.