Mobile brake disc lathe

WARNING: This page is about a different car, the 2011 BMW 750xi, 2011 BMW 750Lxi, 2010 BMW 750xi, and 2010 BMW 750Lxi. However, it is still accessible from the selected car via links, so may be relevant.

IMPORTANT: Only BMW-approved brake disc lathes may be used!

In the case of mobile brake disc lathes, the brake calipers and brake anchor plates must be removed.

The brake discs remain on the vehicle.

Please refer to the equipment manufacturer's Owner's Handbook for the exact procedure.

Fig 1: Identifying Mobile Brake Disc Lathes

Courtesy of BMW OF NORTH AMERICA, INC.

After fine-grinding the brake discs, measure the THICKNESS DIFFERENCE inside the braking surfaces at 8 points with an external caliper gauge.

Fig 2: Checking Thickness Difference Using Micrometer Gauge

Courtesy of BMW OF NORTH AMERICA, INC.