Removing and installing tank for reducing agent, Sharan — VW

🧭 Before you start

Drain the tank, push the liner forward, remove the rear bumper and the tank cover. Unclip and disconnect the supply line and connectors, catch any spill and plug all openings. Support the tank on a padded jack, remove the bolts, pull it from the body guide, release the locking lugs and lower it while freeing the filler neck boot. On refitting, check the filler neck seal, engage the tank in its guide, confirm all lines are secure and adapt the SCR learnt value.

Fits: VW Tiguan I (5N, 2007–2016), VW CC (358, 2012–2017), VW Sharan II / SEAT Alhambra (7N, 2010–)

• Renewed: it if necessary

Don't miss

• Reducing agent is corrosive and crystallises; catch spills with a cloth and plug every open line.
• Seat the 3 spacers flat on the padded jack before removing the bolts.
• Lower slowly and steady the tank by hand to avoid damaging the filler neck.
• Check the filler neck seal and renew it if damaged.
• Adapt the learnt value for the SCR system after draining or renewing components.

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

🔧 Engine codes this applies to

📋 Procedure

1. ⚠ Danger due to escaping reducing agent.Observe safety precautions when working with reducing agent . — Emptying tank for reducing agent .
2. Release rear section of rear left wheel housing liner, and push it forwards General body repairs, exterior66Wheel housing liner; Assembly overview - rear wheel housing liner.
3. Remove rear bumper General body repairs, exterior63Rear bumper.
4. Remove cover (1) on tank for reducing agent (2).
5. To do this, unscrew nuts (arrows).

6. Unclip reducing agent supply line (1) on tank for reducing agent (2)(arrows).
7. Release, pull off and unclip connector (3).
8. Release and pull off connector (4).
9. Unclip lines on tank for reducing agent (arrows).
10. Release and pull off reducing agent supply line (2). Disconnect reducing agent line .
11. Place a cloth underneath coupling point to catch any escaping reducing agent.
12. Seal off all open lines and connections with clean plugs from engine bung setVAS 6122.
13. Place engine and gearbox jackVAS 6931 equipped with a soft foam padding under tank for reducing agent to support it.
14. Position engine and gearbox jackVAS 6931 in such a way that the 3 spacers on tank for reducing agent rest flat against the engine and gearbox jack.
15. Remove bolts (arrows) in side section.
16. Undo bolt (arrow) in area of rear axle.
17. Pull tank for reducing agent (1) out of guide (3) on body.
18. Release locking lugs (3) on left and right next to bolts.
19. Carefully lower reducing agent tank, taking care not to damage filler neck.
20. Detach sealing boot of filler neck in wheel housing from aperture in vehicle body.
21. Carefully lower reducing agent tank, taking care not to damage filler neck. [Note: For reasons of clarity, the engine and gearbox jack is not shown.]
22. Lower tank for reducing agent with engine and gearbox jackVAS 6931.
23. Additionally support tank for reducing agent by hand while doing so.
24. Check seal on filler neck for damage, and renew it if necessary.
25. Ensure proper seating of gasket.
26. Insert guide on tank for reducing agent (2) into guide on body.
27. Use engine and gearbox jackVAS 6931 to position tank for reducing agent on underbody.
28. Ensure lines are secured properly by pulling.
29. Check that all lines are clipped into tank for reducing agent.
30. Adapt learnt value for SCR system after reducing agent has been drained or after components have been renewed .

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