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Home >> BMW >> 2003 >> 745Li >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> DISC - 745i, 745Li, 760i & 760Li >> Testing >> Service Brake >> High-Pressure Test

High-Pressure Test

NOTE: Perform test on both brake circuits, front and rear.
  1. Unscrew vent plug, connect pressure tester and vent. See Fig 1.
  2. Load brake pedal with a force of approximately 112 lbs. (500 N), and block pedal with pedal support.
  3. After 2 minutes, pressure must not drop by more than 8 percent.
  4. Perform low-pressure test. See LOW-PRESSURE TEST .
Fig 1: Connecting Pressure Tester
G00103325Courtesy of BMW OF NORTH AMERICA, INC.
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