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 R8 42 (2007- )
Audi A8 4E (2002 -)
Audi A6 4F (2005- )
Audi Q7 4L (2007- )
Audi TT 8J (2006- )
Audi A4 8K (2008-)

Damping adjustment valve - N337 front right.


J N337 Damping adjustment valve, diagram no 1.

J Connector for damping adjustment valve N337,

diagram no. 2.


J The damper is switched to hard if a current of approx. 1A is applied to the damper coil.


J The damper is switched to soft if a current of approx. 300mA is applied to the damper coil.


YZ Emergency running: If the damper control fails (such as because of a defective control unit) a steel spring is detected. The damper control is then as in the case of a soft set-up.

This ensures stability of driving dynamics.


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