Check wastegate valve with vacuum

WARNING: This page is about a different car, the 2011 BMW 750xi, 2011 BMW 750Lxi, 2010 BMW 750xi, and 2010 BMW 750Lxi. However, it is still accessible from the selected car via links, so may be relevant.

Wastegate valves must be opened without vacuum.

The wastegate valves must close if a vacuum pressure is applied at the wastegate sockets (see BMW diagnosis system).

Check shaft on turbine wheel for rotatability.

Fig 1: Identifying V-Band Clamp And Screw

Courtesy of BMW OF NORTH AMERICA, INC.

Follow diagnosis instructions.