Removing and installing exhaust gas recirculation valve N18 with exhaust gas recirculation potentiometer G212 — AUDI

🧭 Before you start

Remove the wiper arms, washer hose, cowl seal and cowl panel grille, then the fresh air duct, resonator and intake air duct. Unplug and detach the air mass meter G70 connection, move the throttle valve module J338 aside without opening its coolant hoses, and remove the EGR pipe bolts, charcoal filter hose and intake manifold support. Unplug and lift out the EGR valve N18 with potentiometer G212. Fit with new seals and gaskets and original-type hose clips, then reinstall the throttle module and fresh air duct.

Fits: Audi A2 (8Z)

• Renewed: seals

Don't miss

• Use soap solution at the windscreen joint and lift the cowl grille vertically to avoid cracking it.
• Leave the throttle module coolant hoses connected; just move J338 aside.
• Renew all seals and gaskets on the EGR valve and pipe.
• Refit hoses with the same type of clips as original equipment.
• Clear any stored EGR or air mass faults with a scan tool after the job, as general practice.

Written for this job from the workshop steps below · TorqFix editorial.

🔧 Engine codes this applies to

📋 Procedure

1. Remove wiper arm 92.
2. Detach bonnet .
3. Disconnect washer fluid hose (3).
4. If fitted, unplug electrical connectors (4) and (5) for heated washer jets.
5. Use hose clip pliersV.A.G 1921 to loosen hose clip (6) and detach water drain hose from cowl panel grille.

6. Detach seal (1) for cowl panel grille.
7. ⚠ Risk of damage to cowl panel grille.To avoid cracking the cowl panel grille (2) during removal, apply a small amount of soap solution to the joint between the windscreen and the cowl panel grille and pull the grille vertically up out of the fastening strip, starting from the edge of the windscreen. — Detach cowl panel grille (2).
8. Move washer fluid hose clear.
9. Remove nuts and bolts (arrows).
10. Pull fresh air duct forwards and remove by turning it to right side of vehicle.
11. Press release tabs and detach resonator from air hose (arrow 1).
12. Use hose clip pliersV.A.G 1921 to loosen spring-type hose clips (arrows 2) and detach air duct.
13. Detach non-return valve (1) from oil filler neck (2)(arrow A) and move to one side. [Note: Disregard (arrows B, C).]
14. Unplug electrical connector (2) from air mass meter G70.
15. Release clamp (arrow) and detach connection (1) with air mass meter G70.
16. Unplug electrical connector (3).
17. Remove bolts (arrows) and move throttle valve module J338 clear to one side (coolant hoses (1) and (2) remain connected)
18. Remove bolts (arrows) for exhaust gas recirculation pipe.
19. Disconnect hose (2) from activated charcoal filter.
20. Remove bolts (arrows) and detach intake manifold support (3).
21. Unplug connector (4) and detach exhaust gas recirculation valve N18 with exhaust gas recirculation potentiometer G212. [Note: Renew seals and/or gaskets.Secure all hose connections with the correct type of hose clips (same as original equipment) Parts catalogue.]
22. Install throttle valve module J33824.
23. Install fresh air duct 80.

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