Removing and installing Lambda probe 2G108 before catalytic converter - bank 2 (left-side) — AUDI

🧭 Before you start

Fits: Audi A8 D3 (4E, 2002–2010)

• Opens: coolant

Don't miss

• Disregard (items 1, 2 and 3).
• Disregard items (1, 2 and 4).
• For illustration purposes, the installation position is shown with the engine removed.

🔧 Engine codes this applies to

📋 Procedure

1. Pull off rear engine cover panel (top arrows).
2. Drain coolant .
3. Disconnect hoses (1) and (2) and coolant hose (bottom) from coolant expansion tank.
4. Detach electrical connector at coolant shortage indicator switch F66 on coolant expansion tank.
5. Remove bolts (arrows) and remove coolant expansion tank.

6. Remove bolts (arrows) and unplug electrical connectors at ignition coils.
7. Unplug electrical connector (4) for Hall sender 4G301 and move wiring clear. [Note: Disregard (items 1, 2 and 3).]
8. Unplug electrical connector (3) for Lambda probe 2G108 and move wiring clear. [Note: Disregard items (1, 2 and 4).]
9. Unscrew Lambda probe (1) using tool from Lambda probe open ring spanner set3337. [Note: For illustration purposes, the installation position is shown with the engine removed.] [Note: Threads of new Lambda probes are already coated with assembly paste; the paste must not get into the slots on the probe body.In the case of a used Lambda probe grease only the thread with high-temperature paste. The paste must not get into the slots on the Lambda probe body. High-temperature paste Electronic parts catalogueWhen installing, it is important to re-attach the Lambda probe wiring at the same locations to prevent it from coming into contact with the exhaust pipe.] [Note: Do not reuse coolant.]
10. Fill up with coolant .

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