Fuel Tank, Installing, All Vehicles

WARNING: This page is about a different car, the 2022 Audi S5, 2021 Audi S5, 2020 Audi S5, and 2020 Audi A5 Quattro. However, it is still accessible from the selected car via links, so may be relevant.

Special tools and workshop equipment required

Engine and Gearbox Jack :VAS6931

Install in reverse order of removal and note the following:

The fuel lines as well as the wiring harness to the fuel delivery unit must be clipped in the fuel tank.

-- Position the fuel tank with mounting straps on the underbody using the :VAS6931 .

-- When positioning the fuel tank, make sure that the fuel filler neck is guided into the opening of the body correctly.

FWD Vehicles

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-- Tighten the bolts -1 through 5- on the mounting strap and the fuel tank.

AWD Vehicles

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-- Tighten the bolts -1 through 7- on the mounting strap and the fuel tank.

-- Install the driveshaft. Refer to the appropriate service information .

All A4:

-- Engage the fuel filler neck on the mount.

-- TDI vehicles: Install the reducing agent tank filler neck -3-. Refer to the appropriate service information .

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-- Tighten the bolts -1 and 2-.

All A5:

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-- TDI vehicles: install the reducing agent tank filler neck -1-. Refer to the appropriate service information .

-- Tighten the bolts -A and B arrows-.

Continuation for All Vehicles:

WARNING:

Danger due to electrostatic charge.

After installing, check the electrical connection on fuel filler neck threaded ring to an empty spot on the body using an Ohm meter.

Specified value: approximately 0 Ω.

-- Install the fuel filler door unit. Refer to OVERVIEW - PLENUM CHAMBER COVER .

-- TFSI vehicles: Connect the battery. At the same time, follow all steps after connecting the battery. Refer to BATTERY, DISCONNECTING AND CONNECTING .

-- After installing a new or completely empty fuel tank, at least 5 liter (5.28 quarts) of fuel must be added before starting the engine.

NOTE:

Do not allow the fuel pump to run when the fuel tank is empty.

-- Country/Rest of World equipment versions: bleed the fuel line to the parking heater metering pump. Refer to FUEL LINE TO METERING PUMP, BLEEDING .

Tightening Specifications

Refer to OVERVIEW - FUEL TANK
Refer to OVERVIEW - FUEL DELIVERY UNIT/FUEL LEVEL SENSOR .
Refer to OVERVIEW - MUFFLER [CWGD] / OVERVIEW - MUFFLER [CYMC] .
Refer to OVERVIEW - REAR WHEEL HOUSING LINER .
Refer to OVERVIEW - UNDERBODY TRIM PANELS .