Air Supply Unit

Air Supply Unit

Special tools, testers and auxiliary items required

• Torque Wrench (V.A.G 1783)

Removing

• The air supply unit is installed on the underbody (spare wheel well).

- Place the vehicle on a hoist. Refer to => [ Positioning Vehicle on Hoist and Wheels ] Positioning Vehicle on Hoist and Wheels.

- Remove nuts - 1 -.






- Remove the stone chip protective molding - 2 -.

• Make sure no dirt gets into the pressure air system.

• Clean the area before removing connecting pieces for the air pipe lines or other components of the pressured air system.

• Seal off any open pressure lines and connections in the pressure system immediately with plugs or cover them.

- Disconnect connectors - 1 -.






- Remove the air line - 2 - from the solenoid valve block and loosen it out of the clip - 3 -.

- Loosen the clamp - 5 - and remove the intake line - 4 -.

- Unclip the connector - 1 - from the bracket - 2 -.






- Remove the threaded sleeve - 3 - and remove the air supply unit - 4 -.

Installing

Install in reverse order of removal. Note the following:

Tightening specifications, refer to => [ Air Supply Unit and Solenoid Valve Block Overview ] Air Supply Unit and Solenoid Valve Block Overview

Tightening specifications, refer to => [ Air Line Connecting Pieces Tightening Specification ] Description and Operation

Tightening specification for the nuts on the stone chip protection: 9 Nm

- Place vehicle on wheels. Refer to => [ Positioning Vehicle on Hoist and Wheels ] Positioning Vehicle on Hoist and Wheels.

If the air supply unit was replaced, then the level control system compressor relay (J403) must also be replaced. Component location:.