Low-Pressure Test

2013 Mini Cooper Countryman, Standard TransSECTION Low-Pressure Test
WARNING: This page does not describe the selected car, but rather 92 other vehicles, including the 2002 BMW Z3, 2002 BMW M Roadster, 2002 BMW M Coupe, 2001 BMW Z3, and 2001 BMW M5. However, it is still accessible from the selected car via links, so may be relevant.
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 30-72 PSI (2-5 bar), and block pedal with pedal support. Car and measuring equipment must remain perfectly still as vibrations will distort the result.
  3. Pressure should remain constant during five minute test.
  4. Check all rubber parts in case of excessive pressure drop.
  5. Bleed brake calipers and wheel brake cylinders after finishing test.
Fig 1: Connecting Pressure Tester
G00103325Courtesy of BMW OF NORTH AMERICA, INC.
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • You smell fuel, burning insulation, or see smoke.
  • Brakes feel soft, pull hard to one side, or make grinding noises.
  • The engine overheats, stalls repeatedly, or misfires under load.
  • You are missing required tools, torque specs, or safe lifting equipment.
  • You are not confident in the next step or safety outcome.