Removing and installing delivery unit for reducing agent — AUDI

🧭 Before you start

Fits: Audi Q5 (8R, 2008–2017)

• Renewed: seal

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• Hold a clean cloth under the separating point to catch escaping reducing agent.
• Renew seal.Thoroughly clean sealing surfaces for seal.
• Reservoir must be held in place in its installation position when tightening union nut to prevent damage to the lug on the reservoir.
• Position union nut (2) so that mark (3) is positioned above start of first thread (4). At this position there is an arrow (1) on the tank.
• When tightening union nut, make sure that reservoir does not rotate.The reservoir must not be rotated out of its installation position. — Install reducing agent tank .

🔧 Engine codes this applies to

📋 Procedure

1. Remove reducing agent tank .
2. Unplug electrical connectors (1) and (2) and unclip connectors from bracket. [Note: Hold a clean cloth under the separating point to catch escaping reducing agent.]
3. ⚠ Safety risk due to escaping reducing agent.Observe safety measures for handling reducing agent . — Disconnect return line (2) and supply line (3).
4. Move electrical wiring clear.
5. Unscrew union nut (4) using special wrench T40283 and carefully lift off reservoir (1).

6. Unscrew union nut (2) using special wrench T40283 and carefully lift off reservoir (1). [Note: Renew seal.Thoroughly clean sealing surfaces for seal.]
7. ⚠ Safety risk due to escaping reducing agent.Keep in mind that the tank and the reservoir still contain a small amount of reducing agent. — Insert reservoir (2) in tank; while doing so, carefully slide heating element into tank through gap between reservoir and installation opening.
8. Slip new seal (1) onto reservoir and press it until it makes contact at installation opening.
9. Move reservoir into installation position: [Note: Reservoir must be held in place in its installation position when tightening union nut to prevent damage to the lug on the reservoir.]
10. Insert reservoir (2) in tank; while doing so, carefully slide heating element into tank through gap between reservoir and installation opening.
11. Slip new seal (1) onto reservoir and press it until it makes contact at installation opening.
12. Move reservoir into installation position:
13. Position union nut (2) so that mark (3) is positioned above start of first thread (4). At this position there is an arrow (1) on the tank.
14. First tighten union nut by hand and then use special wrench T40283 to tighten it a total of 5/4 turns (450°).
15. ⚠ When tightening union nut, make sure that reservoir does not rotate.The reservoir must not be rotated out of its installation position. — Install reducing agent tank .
16. Adapt learnt value after draining reducing agent or renewing components .

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