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Pressure Regulator

WARNING: This page is about a different car, the 1994 BMW 525iT. However, it is still accessible from the selected car via links, so may be relevant.
  1. Connect Pressure Tester (32-4-000) and Pressure Tester Adapter (34-3-160) to pressure regulator. Start engine. Pressure should rise to 740-810 psi (52-57 kg/cm2 ). Operate brake pedal with engine running to drop pressure gauge reading to 512-583 psi (36-41 kg/cm2 ).
  2. After pressure release, pressure regulator will switch to charging reservoir (pressure rises again). Drop reservoir pressure by operating brake pedal about 20 times. Replace pressure regulator if performance is not as indicated.
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