Removing and installing delivery unit for reducing agent, vehicles with external pump for reducing agent — AUDI

🧭 Before you start

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

• 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.
• Position union nut (2) so that mark (3) is positioned above the first thread (4). At this position there is an arrow (1) on the active tank.

🔧 Engine codes this applies to

📋 Procedure

1. Remove active tank for reducing agent .
2. Press release tabs (arrows), unplug electrical connectors (1) and (2) and unclip 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 . — Press release catches and disconnect return line (1) and supply line (4).
4. Move electrical wiring clear.
5. Unscrew union nut (3) using special wrench T50014 and carefully lift off reservoir (2). [Note: Renew seal.Thoroughly clean sealing surfaces for seal.]

6. ⚠ Risk of malfunctions.The seal must not be twisted.Do not kink heating mats when installing. — Insert reservoir (2) in active tank; while doing so, carefully slide heating mats into active tank through gap between reservoir and installation opening.
7. Slip new seal (1) onto reservoir and press it until it makes contact at installation opening.
8. Move reservoir into installation position:
9. Position union nut (2) so that mark (3) is positioned above the first thread (4). At this position there is an arrow (1) on the active tank.
10. First tighten new union nut by hand and then use special wrench T50014 to tighten it a total of 5/4 turns (450°).
11. Install active tank for reducing agent .
12. Adapt learnt value after draining reducing agent or renewing components .

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