34 00... Checking Brake Discs

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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: Measuring Brake Disc 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: Checking Brake Disc Thickness

Courtesy of BMW OF NORTH AMERICA, INC.