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Home >> Audi >> 2009 >> Q7 4.2 >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 26 (3.0L - Exhaust System & Emission Controls - Engine Code: CATA) >> 26 Exhaust System, Emission Controls >> Reducing Agent Metering System >> Reducing Agent Passive Tank, Removing And Installing >> Removal

Reducing Agent Passive Tank, Removing And Installing: Removal

WARNING: This page is about a different variant/trim than selected.

Follow all safety precautions. Refer to WORKING ON REDUCING AGENT METERING SYSTEM, VEHICLES WITH SCR CATALYTIC CONVERTER .

Follow the guidelines for clean working conditions. Refer to FUEL SUPPLY, INJECTION SYSTEM AND CHARGING SYSTEM CLEAN WORKING CONDITIONS .

WARNING:

Danger due to reducing agent leaking out.

-- Reducing Agent Active Tank, Draining. Refer to REDUCING AGENT ACTIVE TANK, DRAINING .

-- On a vehicle with air suspension, activate vehicle lift mode. Refer to VEHICLE LIFT MODE .

-- Remove the left underbody trim bolts in the center near the passive tank. Refer to UNDERBODY TRIM PANELS .

WARNING:

The weight of the passive tank could cause an accident.

  • The passive tank must be supported by the Engine/Gearbox Jack VAG1383A when Removal.
Fig 1: Supporting Passive Tank Using Engine/Gearbox Jack VAG1383A
GWWA20-10669Courtesy of AUDI OF AMERICA, LLC

-- Place the Engine/Gearbox Jack VAG1383A under the passive tank for support.

-- Remove the bolts -1, 2 and 4-.

Fig 2: Passive Tank -3- Bolts -1, 2 And 4-
GWWA20-10572Courtesy of AUDI OF AMERICA, LLC
NOTE:

The passive tank is shown with the engine/transmission jack.

-- Lower the passive tank -3- with the Engine/Gearbox Jack VAG1383A approximately 100 mm while guiding the passive tank by hand.

NOTE:

Place a clean cloth under the separating location to catch any reducing agent that may leak out.

Seal off all open lines and connections with clean plugs.

WARNING:

The reducing agent can cause skin irritation.

  • Avoid contact with skin and eyes! Always wear protective gloves and safety glasses.
  • If reducing agent should get on your skin, wash it off immediately with soap and water.
  • If reducing agent gets in your eye, rinse the eye for several minutes with water.
  • Never inhale or swallow the reducing agent!
  • Should you swallow any reducing agent, rinse your mouth, drink plenty of water and contact a doctor immediately.
Fig 3: Transfer Line -2-, Connector -1-
GWWA20-10573Courtesy of AUDI OF AMERICA, LLC

-- Unclip the transfer line -2- on the bracket -arrow- and disconnect the Reducing Agent Transfer Pump -V436- by pressing the release button.

-- Disconnect the connector -1- and free up the electrical wire.

NOTE:

Place a clean cloth under the separating location to catch any reducing agent that may leak out.

Seal off all open lines and connections with clean plugs.

Fig 4: Supply Line -1- And The Ventilation Line -2-
GWWA20-10574Courtesy of AUDI OF AMERICA, LLC

-- Disconnect the supply line -1- and the ventilation line -2- by pressing the release button.

-- Lower the passive tank with the Engine/Gearbox Jack VAG1383A while guiding the tank by hand.