Removing and installing intake air duct to throttle valve module J338 — VW

🧭 Before you start

Fits: VW Phaeton (3D)

Don't miss

• Connect hose clip (1) on intake air duct. The clip fastener must face upwards.

🔧 Engine codes this applies to

📋 Procedure

1. Remove rear cover for intake manifold.
2. Remove intake hoses (1) and (2). Loosen hose clip for crankcase breather valve (3) and pull crankcase breather valve off hose connection.
3. Unscrew cable clip (1) and pull vacuum hose (2) off. Unclip coolant pipe and vacuum line (3) from cover (A). Pull cover (A) upwards.
4. Separate all Lambda probe connectors and move electrical wiring clear.
5. Remove securing bolts (arrows) and remove retainer for Lambda probe connector (A).

6. Pull connector (1) off throttle valve module J338. Remove secondary air inlet valve N112 from retainer (2) and loosen hose clip (3). Remove securing bolts (arrows).
7. Bend retainer (1) slightly upwards. Pull intake air duct (A) from throttle valve module J338 and »swing out« upwards.
8. Connect hose clip (1) on intake air duct. The clip fastener must face upwards.
9. Install intake air duct (A) as shown and fit onto throttle valve module J338.
10. Reset bent retainers to the original position.
11. Tighten securing bolts (arrows) and hose clip (3). Reconnect connector (1) and install secondary air inlet valve N112 again.
12. Install retainer for Lambda probe connector and secure (arrows).
13. Restore Lambda probe wiring to original position.
14. Further installation is performed in the reverse sequence.

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