Removing and installing Lambda probe before catalytic converter G39 and Lambda probe after catalytic converter G130 (cylinder bank 1) — AUDI

🧭 Before you start

Fits: Audi A6 C6 (4F, 2004–2011)

Don't miss

• Ignore items marked (1) and (arrows).
• Disregard (item 1).
• Disregard (item 2).

🔧 Engine codes this applies to

📋 Procedure

1. Pull off engine cover panel (rear).
2. Move fuel line and vacuum line going to activated charcoal filter clear at air cleaner housing and at air intake hose.
3. Loosen hose clips (4) and (5) and detach air intake hose from air cleaner housing.
4. Place air intake hose with lines (2) and (3) attached on top of engine. [Note: Ignore items marked (1) and (arrows).]
5. Take corresponding electrical connector out of bracket and unplug it.

6. Unscrew Lambda probe G39(item 2) using a tool from Lambda probe open ring spanner set3337. [Note: Disregard (item 1).]
7. Open quick-release fasteners (1) and (2).
8. Pull pin out of fastener (arrow) and detach noise insulation.
9. Remove bolts (1) and (2) for anti-roll bar mountings (left and right).
10. Unscrew Lambda probe after catalytic converter G130(item 1) using a tool from Lambda probe open ring spanner set3337. [Note: Disregard (item 2).] [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 probe body. High-temperature paste Parts catalogueWhen installing, the Lambda probe wire must always be reattached at the same locations to prevent it from coming into contact with the exhaust pipe.Fit all cable ties in the original positions when installing.]
11. Install anti-roll bar 40.

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