34 00... Checking brake discs

WARNING: This page is about a different car, the 2010 BMW 135i, 2009 BMW 135i, and 2008 BMW 135i. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required:

34 1 280

See BRAKES - SPECIAL TOOLS .

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: Checking Brake Surfaces Thickness
Courtesy of BMW OF NORTH AMERICA, INC.

Check minimum brake disc thickness:

Position special tool 34 1 280 at three measuring points in measuring area (1) and measure
Compare measurement result and lowest value with setpoint value . See BRAKES - TECHNICAL DATA .

Fig 2: Identifying Special Tool 34 1 280 With Measuring Points
Courtesy of BMW OF NORTH AMERICA, INC.