Preparation - vehicles with 1.8L 4-cylinder Turbo engine

WARNING: This page does not describe the selected car, but rather 16 other vehicles, including the 2009 Audi S4, 2009 Audi A4, 2008 Audi S4, 2008 Audi RS 4, and 2008 Audi A4. However, it is still accessible from the selected car via links, so may be relevant.

Procedure

Fig 1: Evaporative Emission Canister Purge Regulator Valve N80 And Air Duct

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Remove screws - arrows -.
Remove Evaporative Emission (EVAP) Canister Purge Regulator Valve 1 N80 - 1 - at air duct.
Remove air duct - 2 -.

Fig 2: Disconnect Wires/Unplug Connectors

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Disconnect electrical connections:

at Evaporative Emission (EVAP) Canister Purge Regulator Valve 1 N80
at Mass Air Flow (MAF) Sensor G70
at Wastegate Bypass Regulator Valve N75

Disconnect hoses - 4... 7 -.
Disconnect hose to secondary air pump.
Set aside wiring.
Release fastener - 8 -.

Remove air cleaner housing.

NOTE:

The vacuum line leading to combination valve for secondary air is clipped onto the underside of the air intake hose.

Install in reverse order of removal.