34 33 071 Replacing Vacuum Hose For Brake Booster (N12)

Necessary preliminary tasks: 

• Remove INTAKE FILTER HOUSING

Before beginning work, fully press the brake pedal several times to reduce the vacuum pressure in the brake booster. This makes it easier to detach the vacuum hose.

Detach quick-release fastener (1).

Unlock quick-release fastener (2) and detach vacuum line (3).

Fig 1: Identifying Quick-Release Fastener And Vacuum Line

Courtesy of BMW OF NORTH AMERICA, INC.