Removing and installing Lambda probe G39 (before catalytic converter at front right) — AUDI

🧭 Before you start

Fits: Audi A8 D3 (4E, 2002–2010)

Don't miss

• Ignore other items.

🔧 Engine codes this applies to

📋 Procedure

1. Detach electrical connector (1) for air mass meter G70.
2. Detach air intake hose (4) from intake manifold.
3. Unhook bracket for connectors (2) and (3) at top section of air cleaner housing.
4. Remove bolts (arrows).
5. Detach top section of air cleaner housing (right-side).

6. Remove air duct (1).
7. Remove bolts (arrows).
8. Remove bottom section of air cleaner housing (right-side).
9. Unplug electrical connector (8) for Lambda probe G39. [Note: Ignore other items.]
10. Move electrical wiring to Lambda probe clear.
11. Unscrew Lambda probe G39(arrow 2) using Lambda probe open ring spanner set3337. [Note: Threads of new Lambda probes are already coated with assembly paste; the paste must not get into the slots on the probe body.If reinstalling the old Lambda probes, coat the threads with high-temperature paste Parts catalogue. The paste must not get into the slots on the probe body.Fit all cable ties in the original positions when installing.When installing, the Lambda probe wires must always be reattached at the same locations to prevent them from coming into contact with the exhaust pipe.]

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