Brake Disc
WARNING: This page is about a different car, the 2004 BMW Z4 and 2003 BMW Z4. However, it is still accessible from the selected car via links, so may be relevant.
Always fine-grind both sides of both brake disks on one axle. Observe maximum machining dimension per friction ring side, minimum brake disk thickness and surface roughness of brake surfaces. Only one brake pad set may be used up on brake discs which have been lathe-turned to minimum thickness.