Removing and installing reservoir for reducing agent — AUDI

🧭 Before you start

Fits: Audi Q7 (4L, 2005–2015)

• Renewed: seal

Don't miss

• Lay 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

📐 18 workshop diagrams for CATA

Real factory drawings for this job — timing marks, bolt locations and routing. Locked in the free view.

📋 Procedure

1. Remove active tank for reducing agent . [Note: Lay a clean cloth under the separating point to catch escaping reducing agent.]
2. ⚠ 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 tab and disconnect supply line (3) and return line (1).
3. Remove electrical connector (5) at bracket and move clear.
4. Unscrew union nut (2) using special wrench T50014 and carefully lift off reservoir (4). [Note: Renew seal.Thoroughly clean sealing surfaces for seal.]
5. ⚠ Safety risk due to escaping reducing agent.Keep in mind that the active tank and the reservoir still contain a little reducing agent. — Insert reservoir (2) in active tank; while doing so, carefully slide heating element into active tank through gap between reservoir and installation opening.

6. Slip new seal (1) onto reservoir and press it until it makes contact at installation opening.
7. Move reservoir into installation position:
8. 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.
9. First tighten new union nut by hand and then use special wrench T50014 to tighten it a total of 5/4 turns (450°).
10. Install active tank for reducing agent .
11. Adapt learnt value after draining reducing agent or renewing components .

Other AUDI procedures

• Removing and installing fuel delivery unit, fuel gauge sender · 2 torque figures
• Removing and installing fuel tank, vehicles with 3.0 ltr. (V6) or 4.2 ltr. (V8) engine
• Removing and installing fuel tank, vehicles with 3.0 ltr. (V6) engine and reducing agent metering system
• Removing and installing suction-jet pump – VW Passat B8
• Checking fuel pressure of fuel pumps V276/V277 – VW 3.0 TDI
• Removing and installing toothed belt – Audi · 56 torque figures
• Removing engine – Audi A8 D3 · 41 torque figures
• Removing camshaft timing chain from camshafts – Audi A6/A7 C7 · 38 torque figures
• Installing engine – Audi A8 D4 · 36 torque figures
• Removing and installing camshaft timing chain · 29 torque figures