Removing and installing Lambda probe: Audi R8 (ARX, ARY, AUM, AUQ, …)

🧭 Before you start

Fits: Audi R8 (4S, 2015–)

• Also covered elsewhere: Electronic parts catalogue for high-temperature paste

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• To remove Lambda probe G39, exhaust gas temperature sender 1G235(item 2) must be unscrewed.
• For illustration purposes, the installation position is shown with the engine removed.
• To remove Lambda probe 2G108, exhaust gas temperature sender 2G448(item 2) must be unscrewed.

🔧 Engine codes this applies to

📋 Procedure

1. Fit protective covers on bodywork .
2. Remove air cleaner housing .
3. Detach electrical connector from bracket and unplug:
4. Move clear electrical wiring to Lambda probe.
5. To remove Lambda probe G39, exhaust gas temperature sender 1G235(item 2) must be unscrewed.

6. Unscrew Lambda probe using a tool from Lambda probe open ring spanner set3337. [Note: For illustration purposes, the installation position is shown with the engine removed.]
7. Detach electrical connector from bracket and unplug:
8. Move clear electrical wiring to Lambda probe.
9. To remove Lambda probe 2G108, exhaust gas temperature sender 2G448(item 2) must be unscrewed.
10. Unscrew Lambda probe using a tool from Lambda probe open ring spanner set3337. [Note: For illustration purposes, the installation position is shown with the engine removed.] [Note: New Lambda probes are coated with an assembly paste.In the case of a used Lambda probe, coat only the thread with high-temperature paste; refer to Electronic parts catalogue for high-temperature paste.The assembly paste / high-temperature paste must not make contact with the slots on the Lambda probe body.]
11. Install air cleaner housing .

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