Removing and installing front part of reducing agent supply line — VW

🧭 Before you start

Fits: VW Passat B8 (3G, 2014–)

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• A guide is supplied through ETKA.
• Make sure that the metering pump V54 engages properly in mounting.

🔧 Engine codes this applies to

📋 Procedure

1. Observe safety precautions .
2. Observe rules for cleanliness .
3. Observe safety precautions when working on the SCR system .
4. Place a cloth underneath coupling point to catch any escaping reducing agent.
5. Seal off all open lines and connections with clean plugs from engine bung setVAS 6122.

6. Remove underbody cover on right side in front of rear axle General body repairs, exterior66Underbody cover; Assembly overview - underbody covers.
7. Detach metering pump V54 on fuel tank Auxiliary heater, supplementary heater82Fuel supply system; Removing and installing metering pump -V54-.
8. To do this, push metering pump V54 from bottom towards top out of mounting.
9. Lay metering pump V54 to one side.
10. Separate fuel lines on underbody 20Push-fit couplings, disconnecting push-fit couplings.
11. Separate supply line for reducing agent at coupling point in area of rear axle .
12. Disconnect connector for reducing agent line .
13. Unclip electrical connection of reducing agent supply line at retainer in area of rear axle, release and pull off .
14. Detach underbody cover on right side and lower General body repair, exterior66Underbody cover; Assembly overview - underbody cover.
15. Unclip retainer (1) on underbody and at lines (2).
16. Unclip reducing agent supply line (3).
17. Lower vehicle using lifting platform.
18. Open push-fit connectors (A) and (B) of fuel lines and pull fuel lines off. Separate push-fit connectors 20Push-fit connectors; Separating push-fit connectors.
19. Separate supply line for reducing agent at injector for reducing agent N474.
20. Unclip screen (1) from body (arrows).
21. Unclip screen (1) from longitudinal member (2).
22. Detach clip (3) on body.
23. Unclip lines and remove screen upwards.
24. Pull supply line for reducing agent and fuel lines together forwards into engine compartment and out of guide tunnel.
25. Unclip supply line for reducing agent (1) out of retaining clips (2) for lines.
26. Clip supply line for reducing agent into retaining clips (2) for lines.
27. Tie reducing agent supply line and connector (3) together (arrow).
28. Attach guide (1), as shown. [Note: A guide is supplied through the parts catalogue.]
29. Slide supply line for reducing agent and fuel lines together from front to rear.
30. Clip supply line for reducing agent into retaining clip for lines.
31. Clip lines into retainer on underbody (1).
32. Then clip retainer onto underbody
33. Reconnect supply line for reducing agent and electrical connection and clip into retainer.
34. Fit metering pump V54 to mounting, and pull it downwards.
35. Make sure that the metering pump V54 engages properly in mounting.

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