34 00... Checking brake discs

WARNING: This page is about a different car, the 2010 BMW 550i, 2009 BMW 550i, and 2008 BMW 550i. 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 BRAKES - TECHNICAL DATA .

Fig 1: Measuring Brake Discs Thickness

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 BRAKES - TECHNICAL DATA .

Fig 2: Checking Minimum Brake Disc Thickness

Courtesy of BMW OF NORTH AMERICA, INC.