Overview - Fuel Delivery Unit/Suction JETION Pump/Fuel Level Sensor, Vehicles With 3.0L (V6)/4.2L (V8) Engines Through 05/2010

Fig 1: Fuel Delivery Unit Components Location

Courtesy of AUDI OF AMERICA, LLC

1. Retaining Ring
   • Welded to the fuel tank
2. Fuel Level Sensor -G-
   • Clipped into the retaining ring -1-
   • For checking the resistance values, refer to Fuel Level Sensor -G-, CHECKING .
   • Removing and installing, refer to Fuel Level Sensor -G-, REMOVING AND INSTALLING .
3. Right Suction Jet Pump
   • For the left fuel delivery unit
   • Clipped into the retaining ring -1-
   • Removing and installing, refer to RIGHT SUCTION JET PUMP, REMOVING AND INSTALLING .
   • Fill the fuel tank with at least five liters of fuel after installing
4. Right Fuel Delivery Unit
   • With Transfer Fuel Pump -G6-
   • Transfer Fuel Pump - G6-, Checking Electrically, refer to FUEL PUMP, CHECKING ELECTRICALLY, VEHICLES WITH 3.0L (V6)/4.2L (V8) ENGINES THROUGH 05/2010 AND 6.0L (V12) ENGINE .
   • Inserted in the retaining ring -1- and turned 15° clockwise to engage (bayonet connection)
   • Removing and installing, refer to RIGHT FUEL DELIVERY UNIT AND Transfer Fuel Pump -G6-, REMOVING AND INSTALLING .
   • Fill the fuel tank with at least five liters of fuel after installing
5. Supply Line to the Auxiliary Heater
6. Right Locking Flange
   • Installed position, refer to Installing 
7. Seal
   • Replacing
   • Install dry
8. Locking Ring
   • Tighten to 110 Nm
   • Remove and install with the Wrench - Fuel Sending UnitT10202
9. Connector
   • For the Transfer Fuel Pump -G6- and the Fuel Level Sensor -G-
10. Fuel Return Line
    • From the fuel system cooler
    • Do not kink
    • Clipped in on fuel tank
    • Connector couplings, disconnecting, refer to CONNECTOR COUPLINGS, SEPARATING .
11. Fuel Supply Line
    • To fuel filter
    • Do not kink
    • Clipped in on fuel tank
    • Connector couplings, disconnecting, refer to CONNECTOR COUPLINGS, SEPARATING .
12. Fuel Supply Line
    • To the metering pump for the auxiliary heater
    • Do not kink
    • Clipped in on fuel tank
    • Connector couplings, disconnecting, refer to CONNECTOR COUPLINGS, SEPARATING .
13. Fuel Return Line
    • Do not kink
    • Connector couplings, disconnecting, refer to CONNECTOR COUPLINGS, SEPARATING .
14. Fuel Supply Line
    • Do not kink
    • Connector couplings, disconnecting, refer to CONNECTOR COUPLINGS, SEPARATING .
15. Connector
    • For the Fuel Pump - G23- and Fuel Level Sensor 2 - G169-
16. Locking Ring
    • Tighten to 110 Nm
    • Remove and install with the Wrench - Fuel Sending UnitT10202
17. Seal
    • Replacing
    • Install dry
18. Left Locking Flange
    • Installed position, refer to Installing 
19. Fuel Supply Line
    • Attached to the left fuel delivery unit -20-
20. Left Fuel Delivery Unit
    • With Fuel Pump - G23-
    • Fuel Pump - G23-, Checking Electrically, refer to FUEL PUMP, CHECKING ELECTRICALLY, VEHICLES WITH 3.0L (V6)/4.2L (V8) ENGINES THROUGH 05/2010 AND 6.0L (V12) ENGINE .
    • Inserted in the retaining ring -22- and turned 15° clockwise to engage (bayonet connection)
    • Removing and installing, refer to LEFT FUEL DELIVERY UNIT AND Fuel Pump -G23-, REMOVING AND INSTALLING .
    • Fill the fuel tank with at least five liters of fuel after installing
21. Fuel Level Sensor 2 -G169-
    • Clipped onto the retaining ring -22-
    • For checking the resistance values, refer to Fuel Level Sensor 2 -G169-, CHECKING .
    • Removing and installing, refer to Fuel Level Sensor 2 -G169-, REMOVING AND INSTALLING .
22. Retaining Ring
    • Welded to the fuel tank
23. Left Suction Jet Pump
    • For the right fuel delivery unit
    • Different versions.
    • Clipped onto the retaining ring -22-
    • Removing and installing, refer to LEFT SUCTION JET PUMP, REMOVING AND INSTALLING .
    • Fill the fuel tank with at least five liters of fuel after installing
24. Fuel Supply Line
    • Attached to the right fuel delivery unit -4-