34 00... Checking brake discs

WARNING: This page does not describe the selected car, but rather 18 other vehicles, including the 2015 BMW Alpina B7L xDrive, 2015 BMW Alpina B7 xDrive, 2015 BMW 750i xDrive, 2015 BMW 750Li xDrive, and 2015 BMW 740Li xDrive. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required:

34 1 280

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 - TECHNICAL DATA or REAR BRAKE - TECHNICAL DATA .

Fig 1: Checking Thickness Difference 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 - TECHNICAL DATA or REAR BRAKE - TECHNICAL DATA .

Fig 2: Positioning Special Tool (34 1 280) At Three Measuring Points
Courtesy of BMW OF NORTH AMERICA, INC.