Heated Oxygen Sensor, Removing And Installing: Removing

-- Remove the engine cover. Refer to ENGINE COVER, REMOVING AND INSTALLING .

Oxygen Sensor 1 Before Catalytic Converter -GX10- :

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-- Disconnect the connector -2-.

-- Remove the Oxygen Sensor 1 Before Catalytic Converter -GX10- -1- using a tool from the Ring Wrench 7-Piece Set: 3337  .

Oxygen Sensor 1 after Catalytic Converter -GX7- :

Courtesy of AUDI OF AMERICA, LLC

-- Disconnect the connector -2-.

-- Remove the Oxygen Sensor 1 After Catalytic Converter -GX7- -1- using a tool from the Ring Wrench 7-Piece Set: 3337  (example illustration).