Installing fuel tank - all vehicles: Audi A4 B9 (CRTC, CSWB, CVKB, CVNA, …)

🧭 Before you start

Fits: Audi A4 B9 (8W, 2015–)

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• When installing fuel tank, make sure that fuel filler neck is correctly inserted into opening on body.
• The fuel pump must not be allowed to run in an empty fuel tank.

🔧 Engine codes this applies to

📋 Procedure

1. Position fuel tank and securing straps on underside of vehicle using engine and gearbox jackVAS 6931.
2. When installing fuel tank, make sure that fuel filler neck is correctly inserted into opening on body.
3. Tighten bolts (1 ... 5) for securing straps and fuel tank.
4. Tighten bolts (1 ... 7) for securing straps and fuel tank.
5. Install propshaft 39Propshaft; Removing and installing propshaft.

6. Engage fuel filler neck on mounting.
7. TDI vehicles: Install filler neck for reducing agent (3)26SCR (selective catalytic reduction) system; Exploded view - reducing agent tank.
8. Tighten bolts (1, 2).
9. ⚠ Safety risk due to electrostatic discharge.After installation, use an ohmmeter to check the electrical connection between the threaded ring on the fuel filler neck and a bare metal part on the body.Specification: approx. 0 Ω — Install tank flap unit General body repairs, exterior55Tank flap unit; Removing and installing tank flap unit.
10. TFSI vehicles: Connect battery and perform steps required after re-connecting battery Electrical system27Battery; Disconnecting and connecting battery.
11. After installing a new or completely drained fuel tank, the tank must be filled with at least 5 litres of fuel before starting the engine. [Note: The fuel pump must not be allowed to run in an empty fuel tank.]
12. Depending on equipment version: Bleed fuel line leading to metering pump for auxiliary heater .

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