Checking wastegate on cylinders 1-3
WARNING: This page is about a different car, the 2010 BMW X6, 2009 BMW X6, and 2008 BMW X6. However, it is still accessible from the selected car via links, so may be relevant.
Detach vacuum line (1) from EPPC (2), cylinders 1-3 (OUT).
Clamp off connecting line with suitable tool (1).
Attach vacuum line to pneumatic coupling with Red pneumatic hose in direction of arrow.
Courtesy of BMW OF NORTH AMERICA, INC.