Removing and installing active tank for reducing agent — AUDI

🧭 Before you start

Fits: Audi A5 (8T, 2007–2016), Audi A5 Cabriolet (8F), Audi A4 B8 (8K, 2007–2015)

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• Disregard (item 1).
• Risk of accident caused by weight of active tank.Active tank must be empty when it is removed. — Position engine and gearbox jackV.A.G 1383 A underneath active tank with a soft foam surface in between for support.
• For greater clarity the active tank is shown without the engine and gearbox jack.Disregard (item 1).
• Hold a clean cloth under the separating point to catch escaping reducing agent.

🔧 Engine codes this applies to

📋 Procedure

1. ⚠ Safety risk due to escaping reducing agent.To prevent large amounts of reducing agent from escaping when the metering line is opened, wait until the reducing agent has been drawn back automatically . — Drain active tank for reducing agent .
2. Unplug electrical connector (2).
3. Remove nuts/clips (arrows) for control unit for NOx sender 2J881.
4. Move electrical wiring clear. [Note: Disregard (item 1).]
5. If fitted, remove bolt (1) and detach bracket with particulate sensor(2) in direction of (arrow).

6. Move electrical wiring clear.
7. Remove bolts (arrows) and detach heat shield (1).
8. ⚠ Reducing agent can cause skin irritation.Avoid contact with the skin and eyes. Wear gloves and safety goggles.If your skin has come into contact with reducing agent, rinse it off with soap and water.If reducing agent gets into your eyes, rinse them out with water for several minutes.Do not breathe in or swallow reducing agent.If you have swallowed reducing agent, rinse your mouth, drink lots of water and consult a paramedic or doctor immediately. — Press release catches and disconnect filler line (1) and metering line (2).
9. Unplug electrical connectors (3 ... 6) and move electrical wiring harness clear.
10. Unplug electrical connectors (1) and (3 … 5) and move electrical wiring clear.
11. Disconnect line for reducing agent (2).
12. ⚠ Risk of accident caused by weight of active tank.Active tank must be empty when it is removed. — Position engine and gearbox jackV.A.G 1383 A underneath active tank with a soft foam surface in between for support.
13. Remove bolts (2) and (3) (have a second mechanic support the active tank (4) by hand). [Note: For greater clarity the active tank is shown without the engine and gearbox jack.Disregard (item 1).]
14. Then lower active tank about 100 mm using engine and gearbox jackV.A.G 1383 A (guide tank down by hand). [Note: Hold a clean cloth under the separating point to catch escaping reducing agent.]
15. Press release tab and disconnect transfer line (1).
16. Press release catches and disconnect breather line (2).
17. Seal off open pipes/lines and connections with clean plugs from engine bung setVAS 6122.
18. Continue lowering active tank using engine and gearbox jackV.A.G 1383 A (keep guiding tank down by hand).
19. Check that lines are clipped onto active tank.
20. Adapt learnt value after draining reducing agent or renewing components .

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