Heated Oxygen Sensor And Heated Oxygen Sensor 2

Special tools and workshop equipment required 

• Ring spanner 7-piece set 3337

Removing

-- Pull off the air duct cover -1-, disengage the clips sideways to do so.

Fig 1: Air Duct Cover & Air Duct

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Remove the air duct -2-.

-- Remove the air filter housing and connecting hose, while doing this remove the bolt -A-, disconnect the electrical connector -B- and remove the spring clip -C-. When reinstalling, observe the marking -D-.

Fig 2: Identifying Air Filter Housing Components

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Disconnect the electrical connectors -1 and 2- for the Heated Oxygen Sensor (HO2S) and HO2S 2.

Fig 3: Disconnecting Electrical Connectors And For Heated Oxygen Sensor (HO2S) G39 And Heated Oxygen Sensor (HO2S) 2 G108

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Free up the electrical wires to oxygen sensors.

-- Remove the HO2S 2 -1- and HO2S -2-.

Fig 4: Identifying Connectors To Heated Oxygen Sensors, 1 And 2

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

Installing

Installation is performed in the reverse order of removal, noting the following.

-- Use hot bolt paste G 052 112 A3 to grease the threads on used oxygen sensors; do not let the paste get onto the slits in the oxygen sensor body

-- Install the wiring to its original position again.