Removing and installing combination valve (left-side) — AUDI

🧭 Before you start

Fits: Audi A6/A7 C7 (4G, 2011–2018); platform code 4X

• Renewed: gasket

Don't miss

• Renew gasket after removing.

🔧 Engine codes this applies to

📋 Procedure

1. Remove front silencer (left-side) .
2. Remove body brace Running gear, axles, steering40Suspension strut, upper links; Removing and installing body brace.
3. Remove front wheel housing liner (left-side) General body repairs, exterior66Wheel housing liners; Removing and installing front wheel housing liner.
4. Remove bolts (arrows) and detach heat shield (left-side) (1).
5. ⚠ Electronic components are susceptible to damage.Observe notes on procedure for disconnecting the battery. — Switch off ignition and take out ignition key.

6. Disconnect earth wire from battery terminal Electrical system27Battery; Disconnecting and connecting battery.
7. Move clear electrical wiring for Lambda probe 2 after catalytic converter G131.
8. Remove bolt (1) and nuts (arrows), detach catalytic converter (left-side) from exhaust manifold and move to rear.
9. Unscrew bolts (arrows) and pull filler neck (1) out of washer fluid reservoir and through opening in body to right side.
10. Remove cap nut (2) and move earth wiring clear.
11. Release fastener (arrow), detach engine control unit J623(item 1) from bracket and swivel it to one side.
12. Remove bolts (arrows) and detach cover (1) for electronics box in plenum chamber.
13. Unplug electrical connectors (1) and unscrew nut (2) for electrical wiring.
14. Release catches (arrows) and detach relay carrier with fuse holder (3).
15. Disengage engine wiring harness at electronics box in plenum chamber and move clear.
16. Release catches (arrows A) and lift off wiring protector (1)(arrow B).
17. Move clear wiring harness and press to one side.
18. Remove bolts (arrows) and detach heat shield (1).
19. Remove bolts (3) for secondary air system hose.
20. Detach vacuum hose (2) from combination valve for secondary air system.
21. Unscrew bolts (1) and detach combination valve for secondary air system. [Note: Renew gasket after removing.]
22. Electrical connections and routing .
23. Install engine control unit J623.
24. Install filler neck for washer fluid reservoir Electrical system92Windscreen washer system; Exploded view - windscreen washer system.
25. Install catalytic converter (left-side) .
26. Observe steps required after re-connecting battery Electrical system27Battery; Disconnecting and connecting battery.

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