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 FRONT BRAKES or REAR BRAKES .

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 area (1) and measure. Compare measurement result and lowest value with setpoint value. See FRONT BRAKES or REAR BRAKES .

Fig 2: Checking Minimum Disc Thickness

Courtesy of BMW OF NORTH AMERICA, INC.