Overview - Fuel Delivery Unit/Suction Jet Pump/Fuel Level Sensor, Vehicles With 6.0L (V12) Engine

Transfer Fuel Pump - G6- and Fuel Level Sensor - G- (right clamp)

Fig 1: Fuel Delivery Unit Components Location

Courtesy of AUDI OF AMERICA, LLC

1. Fuel Level Sensor -G-
   • Clipped onto the retaining ring -item 13-
   • For checking the resistance values, refer to Fuel Level Sensor -G-, CHECKING .
   • Removing and installing, refer to Fuel Level Sensor -G-, REMOVING AND INSTALLING .
2. Right Suction Jet Pump
   • For the left fuel delivery unit
   • Clipped onto the retaining ring -item 13-
   • Removing and installing, refer to RIGHT SUCTION JET PUMP, REMOVING AND INSTALLING, VEHICLES WITH 6.0L (V12) ENGINE .
   • Fill the fuel tank with at least five liters of fuel after installing
3. Connector
   • For the Transfer Fuel Pump -G6- and the Fuel Level Sensor -G-
4. 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 .
5. Fuel Return Line
   • from the fuel system cooler
   • Do not kink
   • Clipped in on fuel tank
   • Connector couplings, disconnecting, refer to CONNECTOR COUPLINGS, SEPARATING .
6. Fuel supply line
   • To the regulator valve
   • Do not kink
   • Clipped in on fuel tank
   • Connector couplings, disconnecting, refer to CONNECTOR COUPLINGS, SEPARATING .
7. Locking Ring
   • Remove and install with the Wrench - Fuel Sending UnitT10202
   • Tighten to 110 Nm
8. Seal
   • Replacing
   • Install dry
9. Right Locking Flange
   • Installed position Installing 
10. Fuel Return Line
    • To the left fuel delivery unit
    • Do not kink
    • Connector couplings, disconnecting, refer to CONNECTOR COUPLINGS, SEPARATING .
11. Fuel Supply Line
    • From suction jet pump, left side
    • Clipped to the right fuel delivery unit -item 12-
12. 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 -item 13- and turned 15° clockwise to engage (bayonet connection)
    • Removing and installing, refer to Transfer Fuel Pump - G6-, REMOVING AND INSTALLING, VEHICLES WITH 6.0L (V12) ENGINE .
    • Fill the fuel tank with at least five liters of fuel after installing
13. Retaining Ring
    • Welded to the fuel tank

Fuel Pump - G23- and Fuel Level Sensor 2 - G169- (left clamp)

Fig 2: Fuel Pump Components Location

Courtesy of AUDI OF AMERICA, LLC

1. Left Suction Jet Pump
   • For the right fuel delivery unit
   • Clipped onto the retaining ring -item 12-
   • Removing and installing, refer to LEFT SUCTION JET PUMP, REMOVING AND INSTALLING, VEHICLES WITH 6.0L (V12) ENGINE .
   • Fill the fuel tank with at least five liters of fuel after installing
2. Fuel Return Line
   • From the right locking flange
   • Do not kink
   • Connector couplings, disconnecting, refer to CONNECTOR COUPLINGS, SEPARATING .
3. Fuel Supply Line
   • From suction jet pump, right side
   • Attached to the left fuel delivery unit -item 10-
4. Connector
   • For the Fuel Pump - G23- and Fuel Level Sensor 2 - G169-
5. Fuel Return Line
   • from the fuel system cooler
   • Do not kink
   • Clipped in on fuel tank
   • Connector couplings, disconnecting, refer to CONNECTOR COUPLINGS, SEPARATING .
6. Fuel supply line
   • To the regulator valve
   • Do not kink
   • Clipped in on fuel tank
   • Connector couplings, disconnecting, refer to CONNECTOR COUPLINGS, SEPARATING .
7. Locking Ring
   • Remove and install with the Wrench - Fuel Sending UnitT10202
   • Tighten to 110 Nm
8. Seal
   • Replacing
   • Install dry
9. Left Locking Flange
   • Installed position Installing 
10. 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 -item 12- and turned 15° clockwise to engage (bayonet connection)
    • Removing and installing, refer to Fuel Pump - G23-, REMOVING AND INSTALLING, 6.0L (V12) ENGINE .
    • Fill the fuel tank with at least five liters of fuel after installing
11. Fuel Level Sensor 2 -G169-
    • Clipped onto the retaining ring -item 12-
    • 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 .
12. Retaining Ring
    • Welded to the fuel tank