WARNING: This page is about a different car, the 2003 BMW 530i, 2002 BMW 530i, and 2001 BMW 530i. However, it is still accessible from the selected car via links, so may be relevant.
WHEEL BEARINGS AND STEERING KNUCKLE ALL - SPECIFICATION CHART
Bearing units lubricated for entire service life and cannot be disassembled
Max. axial runout of wheel hub at wheel bearing flange