HYDRAULIC CONTROL UNIT, REMOVING AND INSTALLING, 0D3 "quattro sport" AND 0BX "quattro sport": Removing

• The ignition is off.

-- Place the vehicle on a hoist.

-- Slightly lower the rear section of the exhaust system and secure. Refer to the appropriate Exhaust Information .

-- If equipped, remove the screws -arrows- and remove the wiring harness bracket -1- from the rear final drive. 

Fig 1: Identifying Rear Final Drive Wiring Harness Bracket

Courtesy of AUDI OF AMERICA, LLC

-- Disconnect the connectors -2- from the Oil Pressure/Temperature Sensor -- and the Clutch Valves --.

-- Disconnect the connector -4- from the All-Wheel Drive Pump -V415-.

-- Unclip the wiring harness -3- from the final drive and the subframe and tie it up -items 5 through 7-.

-- Place the Drip Tray under the rear final drive.

-- Drain the ATF from the rear final drive. Refer to ATF, DRAINING AND FILLING .

-- Drain the gear oil from the rear final drive. Refer to GEAR OIL, DRAINING, 0D3 "quattro sport" AND 0BX "quattro sport" .

-- Remove the All-Wheel Drive Pump -V415-. Refer to All-Wheel Drive Pump -V415-, REMOVING AND INSTALLING, 0D3 AND 0BX .

Fig 2: Hydraulic Control Unit Tightening Sequence And Components

Courtesy of AUDI OF AMERICA, LLC

-- Loosen the nuts for the left pipe -6- and right pipe -7- on the hydraulic control unit -A arrows- one turn.

-- Remove the nuts on the chamber -B arrows-.

-- Remove the screws -2 through 5- and remove the hydraulic control unit -1- with the seal.

Tip

• Follow all safety precautions exactly when replacing the hydraulic control unit. Install the "old" sensors again if possible. Refer to SAFETY PRECAUTIONS .