34 21 947 Fine-grinding both sides of both rear brake disks (brake disks removed)
IMPORTANT:
Always fine-grind both sides of both brake discs on one axle. Note MAX. machining dimension per friction ring side, minimum brake disc thickness (MIN TH, refer to REAR BRAKES
) and Observe surface roughness of brake surfaces. Only one brake lining set may be used up on brake discs which have been lathe-turned to minimum thickness (MINTH, refer to REAR BRAKES
). Grinding machine: refer to BMW Service Workshop Equipment/Planning documentation. Follow the machine manufacturer's operating instructions.