Overview - Fuel Delivery Unit/Fuel Level Sensor, TDI AWD Vehicles

WARNING: This page is about a different car, the 2022 Audi S3, 2022 Audi RS 3, 2022 Audi A3 Quattro, and 2022 Audi A3. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Exploded View Of Fuel Delivery Unit/Fuel Level Sensor, TDI AWD Vehicles

Courtesy of AUDI OF AMERICA, LLC

Fuel Delivery Unit -GX1-
- With the Transfer Fuel Pump -G6-
- Check the fuel pump electronically using the Vehicle Diagnostic Tester.
- Removing and Installing. Refer to FUEL DELIVERY UNIT/FUEL LEVEL SENSOR, REMOVING AND INSTALLING, TDI VEHICLES .
- Connector Couplings, Disconnecting and Connecting. Refer to CONNECTOR COUPLINGS, DISCONNECTING .
- It must be ensured that at least five liters of fuel are in the fuel tank after installation.
Clamp
- Always replace after removing
Grommet
Clamp
- Always replace after removing
Fuel Line
- To the Metering Pump -V54-
- For versions with parking/auxiliary heater
Fuel Supply Line
- To the fuel filter
- Clipped to the fuel tank
- Do not kink
- Connector Couplings, Disconnecting and Connecting. Refer to CONNECTOR COUPLINGS, DISCONNECTING .
Fuel Pump Control Module -J538-
- Check using the Vehicle Diagnostic Tester.
- Removing and Installing. Refer to Fuel Pump Control Module -J538-, REMOVING AND INSTALLING, VEHICLES WITHOUT HIGH-VOLTAGE SYSTEM .
Wire
- For Fuel Delivery Unit -GX1- with fuel delivery unit for:
  - Transfer Fuel Pump -G6-
  - Fuel Level Sensor -G-
  - Fuel Pump Control Module -J538-
  - Equipment version: Metering Pump -V54-
- Make sure it is attached securely
Fuel Return Line
- From the engine
- Clipped to the fuel tank
- Do not kink
- Connector Couplings, Disconnecting and Connecting. Refer to CONNECTOR COUPLINGS, DISCONNECTING .
Locking Ring
- 110 Nm
- Loosen and tighten using the Wrench - Fuel Sending Unit: T10202
Seal
- Always replace
- Install dry
Wire
- With connectors for:
  - Fuel Level Sensor 2 -G169-
  - All-Wheel Drive Control Module -J492- with All-Wheel Drive Clutch Pump -V181-
  - Equipment version: Fuel Pump Control Module -J538-
- Make sure it is attached securely
Locking Ring
- 110 Nm
- Loosen and tighten using the Wrench - Fuel Sending Unit: T10202
Seal
- Always replace
- Install dry
Fuel Level Sensor 2 -G169-
- Removing and Installing. Refer to Fuel Level Sensor 2 -G169-, REMOVING AND INSTALLING .
Fuel Level Sensor -G-
- Removing and Installing. Refer to Fuel Level Sensor -G-, REMOVING AND INSTALLING .