Removing and installing pump for reducing agent V437 — AUDI

🧭 Before you start

Fits: platform codes 2EA, 2FC

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• If any seals remained on the internal hydraulic sealing points (1) after the removal of the pump for reducing agent, remove the seals.
• To compensate for the settling, wait at least 2 minutes before tightening securing bolts (1), (2) and (3) again to 6 Nm in same sequence.

🔧 Engine codes this applies to

🔩 Torque settings

Values can differ between engine variants — check the code stamped on your block.

ℹ️ Always cross-check the exact figure against your vehicle's factory manual before final tightening — a wrong torque can damage the engine. These values are extracted from workshop data and may not cover every variant or revision.

📋 Procedure

1. ⚠ Observe safety precautions when working on the SCR system .Observe rules for cleanliness when working on the SCR system . — Emptying tank for reduction agent .
2. Remove reduction agent tank .
3. ⚠ Immediately seal all open lines and connections using suitable plugs to prevent ingress of dirt. The smallest particle of dirt can cause extensive damage to the system.Protect disconnected connectors against wetting from reducing agent by suitable means, e.g. a plastic bag and cable ties. Electrical connections may be damaged due to the high penetration ability along with subsequent crystallisation of the reducing agent.The hydraulic connections of the pump for reducing agent must not be cleaned using compressed air. — Thoroughly clean and dry tank for reducing agent in area of delivery module to prevent ingress of dirt during removal and installation processes.
4. Unscrew securing bolts (1), (2) and (3) (Torx T30).
5. Fit suitable screwdriver with flat, 8 mm wide blade (1) under edge (2) of pump for reducing agent, and support it at web (3).

6. ⚠ The web (3) must not be deformed plastically when levering out the pump for reducing agent.If the web (3) is plastically deformed when levering out the pump for reducing agent, the adjacent resin seal may become damaged or leaky.Lever pump for reducing agent upwards in a straight line out of delivery module, making sure not to apply excessive force. — Swivel flat-bladed screwdriver (1) in direction of (arrow) to lever pump for reducing agent in a straight line upwards out of delivery module.
7. Remove pump for reducing agent (2) in a straight line upwards from delivery module. [Note: If any seals remained on the internal hydraulic sealing points (1) after the removal of the pump for reducing agent, remove the seals.] [Note: Before installing the pump for reducing agent, clean the sealing points and contact surfaces of the pump in the delivery module with water and a lint-free cloth to remove crystallised AdBlue residue and dirt.]
8. Thoroughly clean internal hydraulic sealing points (1) to remove AdBlue residue and dirt, and dry them afterwards.
9. Thoroughly clean contact surfaces of pump in fuel delivery module (arrows) to remove AdBlue residue and dirt, and dry them afterwards.
10. Push rubber dampers (1) into mountings on new pump for reducing agent.
11. ⚠ Risk of malfunction due to improper installation of the spacer sleeves.The pump will not function properly if the spacer sleeves are inserted into the rubber dampers from above.Please make sure to insert the three spacer sleeves into the rubber dampers from below. — Insert spacer sleeves (2) into rubber dampers from below, as shown in illustration.
12. Pull out two sealing plugs (1), and use distilled water as assembly aid for coating seals located underneath.
13. Insert pump for reducing agent (2) in a straight line into delivery module ensuring that the seals are properly fitted onto internal hydraulic sealing points (1).
14. Push pump for reducing agent (2) into delivery module until the surface of pump housing does not project above the end face of delivery module by more than 1 mm.
15. ⚠ Risk of damage to the securing thread of the delivery module.Uncontrolled screwing-in of the bolts for securing the pump to the delivery module may cause damage to the plastic thread in the delivery module.Proceed very carefully, and make sure not to cross-thread when screwing in the securing bolts.Also, observe the specified tightening sequence and specified torques. — First, screw in securing bolts (1), (2) and (3) completely; then tighten them to 6 Nm in the same sequence. — 6 Nm (4.4 lb-ft)
16. To compensate for the settling, wait at least 2 minutes before tightening securing bolts (1), (2) and (3) again to 6 Nm in same sequence. — 6 Nm (4.4 lb-ft)
17. Install reduction agent tank .
18. Fill reducing agent tank 1.2.

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