Necessary preliminary tasks

WARNING: This page is about a different car, the 2013 BMW X5 M, 2012 BMW X5 M, 2011 BMW X5 M, and 2010 BMW X5 M. However, it is still accessible from the selected car via links, so may be relevant.

Remove WHEELS .

Checking thickness difference:

Measure thickness difference within brake surfaces at 8 point (spread over the circumference) with a micrometer gauge
Compare measurement result with SETPOINT VALUE

Fig 1: Measuring Thickness Difference Within Brake Surfaces Using Micrometer Gauge

Courtesy of BMW OF NORTH AMERICA, INC.

Check minimum brake disc thickness:

Position special tool 34 1 280 at three measuring points in area (1) and measure.
Compare measurement result and lowest value with setpoint value See FRONT BRAKE, BMW, E70 or REAR BRAKE, BMW, E70

Fig 2: Checking Minimum Brake Disc Thickness Using Special Tool (34 1 280)
Courtesy of BMW OF NORTH AMERICA, INC.