Logic of naming actuators in VW-group is simple it contains "N" + actuator number. The actuator number is unique. Here you can find fitting location, connectors and some basic information about actuators.

To our mind, actuators information is reference, so there is only simple search by number.


Audi A6 4B (1998-2005)

Vacuum diagram for solenoid valves -N156

and -N331 in the S6


1- Intake manifold changeover valve N156    

J Actuation for both vacuum units on the intake manifold           


2- Intake air changeover valve N331

J Actuation for flap in air cleaner


a- T-piece for vacuum supply from solenoid valve -N156 to vacuum units


b- Vacuum supply to intake pipe


c- Vacuum line to flap in air cleaner


d- T-piece for vacuum supply to solenoid valve -N156


d- T-piece for vacuum supply to solenoid valve -N331 and vacuum pressure accumulator


f- Vacuum line to vacuum pressure accumulator



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