34 00... Checking brake discs

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

Fig 1: Checking Brake Surface Thickness Using Micrometer Gauge

Courtesy of BMW OF NORTH AMERICA, INC.

Check minimum brake disc thickness:

• Position special tool 34 1 280 GAUGE at three measuring points in area (1) and measure.
• Compare measurement result and lowest value with SETPOINT VALUE

Fig 2: Checking Minimum Brake Disc Thickness Using Special Tool (34 1 280)

Courtesy of BMW OF NORTH AMERICA, INC.