3400... Checking brake discs

WARNING: This page does not describe the selected car, but rather 13 other vehicles, including the 2011 BMW 328xi, 2011 BMW 328i, 2011 BMW 323i, 2010 BMW 335xi, and 2010 BMW 335i. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary tasks

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. See FRONT BRAKE

Fig 1: Measuring Brake Surface Thickness Using Screw Gauge
Courtesy of BMW OF NORTH AMERICA, INC.

Check minimum brake disc thickness:

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

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