Heated Oxygen Sensor -G39-: Removing

WARNING: This page is about a different car, the 2012 Audi Q5, 2011 Audi Q5, 2010 Audi Q5, and 2009 Audi Q5. However, it is still accessible from the selected car via links, so may be relevant.

-- Pull rear engine cover off -arrows-.

Fig 1: Pulling Rear Engine Cover Off

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-- Free up fuel supply line -4- and hose connection -1- to the Evaporative Emission (EVAP) canister on the air filter housing and on the air guide tube.

Fig 2: Identifying Air Guide Hose Components

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-- Remove vacuum hose -2- from the air guide hose.

-- Remove air guide hose by loosening the hose clamp -3- and opening the clips -arrows-.

-- Remove lower section of the air filter housing. Refer to LOWER AIR FILTER HOUSING .

-- Disconnect electrical connector -4- for the Heated Oxygen Sensor (HO2S) -G39-.

Fig 3: Electrical Connectors

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-- Remove HO2S -- -1- using a tool from the 3337.

Fig 4: Locating Oxygen Sensors - Cylinder Bank 1 (Right)

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NOTE:

The installation location is shown with the engine removed.