Individual components of vacuum control unit
WARNING: This page does not describe the selected car, but rather 14 other vehicles, including the 2005 Volkswagen GTI, 2004 Volkswagen R32, 2004 Volkswagen Jetta, 2004 Volkswagen GTI, and 2003 Volkswagen Jetta. However, it is still accessible from the selected car via links, so may be relevant.
1 - From check-valve -3- to intake manifold. Refer to Intake manifold (vehicles with engine code BJS), disassembling and assembling , item 10
2 - From Exhaust Flap Valve 1 -N321- to vacuum actuator. Refer to Muffler with mounts (vehicles with engine codes BJS) , item 12
3 - Check valve:
White valve side points to vacuum reservoir
Check Exhaust Flap Valve 1 -N321-. Refer to Exhaust Flap Valve 1 (vehicles with engine code BJS), checking .