Removing and installing Lambda probe 4G286 (before catalytic converter at rear left) — AUDI

🧭 Before you start

Fits: Audi A8 D3 (4E, 2002–2010)

• Renewed: o-ring

Don't miss

• Secure brake disc with wheel bolts.
• Ignore other items.

🔧 Engine codes this applies to

📋 Procedure

1. Activate jacking mode Running gear, front-wheel drive and four-wheel drive43Operating the air suspension.
2. Remove front left wheel. [Note: Secure brake disc with wheel bolts.]
3. Remove front section of wheel housing liner (front left) General body repairs, exterior66.
4. Press release tabs to detach the two air intake hoses (bottom) (arrows) at bottom section of air cleaner housing (left-side).
5. Detach electrical connector (3) for air mass meter 2G246.

6. Detach hose (2) from air intake hose.
7. Detach air intake hose (1) from intake manifold.
8. Remove bolts (arrows).
9. Detach top section of air cleaner housing (left-side).
10. Remove air duct (1).
11. Remove bolts (arrows).
12. Remove bottom section of air cleaner housing (left-side).
13. Remove bolt (1).
14. Pull the guide tube for oil dipstick out upwards (arrow).
15. Unplug electrical connector (2) for Lambda probe 4G286. [Note: Ignore other items.]
16. Move electrical wiring to Lambda probe clear.
17. Unscrew Lambda probe 4G286(arrow 1) using open socket with extension. [Note: Renew O-ring.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.]
18. Install front section of wheel housing liner (front left) General body repairs, exterior66.
19. Deactivate jacking mode Running gear, front-wheel drive and four-wheel drive43Operating the air suspension.

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