Calibration for vacuum pressure measurement

WARNING: This page is about a different car, the 2010 BMW 135i, 2009 BMW 135i, and 2008 BMW 135i. However, it is still accessible from the selected car via links, so may be relevant.

Release lock nut on controller (1).

Press setting with measurement.

Determine ambient pressure
Seal stop cock (2) in direction of arrow
Set controller (1) to 200 ± 10 mbar below ambient pressure (e.g. 980 - 200 = 780 mbar).

Open stop cock (2) again.

Wastegate valve closes.

Fig 1: Sealing Stop Cock

Courtesy of BMW OF NORTH AMERICA, INC.

Initial position (1) of wastegate linkage with preset vacuum pressure.

Wastegate valve virtually closed.

Fig 2: Identifying Initial Position Of Wastegate Linkage With Preset Vacuum Pressure

Courtesy of BMW OF NORTH AMERICA, INC.