34 21 947 Fine-grinding both sides of both rear brake disks (brake disks removed)
WARNING: This page is about a different car, the 2005 BMW 645Ci and 2004 BMW 645Ci. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT:
Always fine-grind both sides of both brake disks on one axle. machining dimension per friction ring side, minimum brake disk thickness (MIN TH) and Observe surface roughness of brake surfaces. Observe max. Only one brake lining set may be used up on brake discs which have been lathe-turned to minimum thickness (MIN TH). Brake disks of M models (Compound brake disks) must not be machined! Refer to BRAKES - TECHNICAL DATA
.
Grinding machine: refer to BMW Service
Workshop equipment/Planning documentation. Follow the machine manufacturer's operating instructions.