Oxygen Sensor 2 after Catalytic Converter (G131)

Oxygen Sensor 2 after Catalytic Converter (G131)

Special tools, testers and auxiliary items required

• Ring Spanner 7-Piece Set (3337)

Removing

- Remove the rear engine cover - 2 - upward.






- Remove bolt - arrow -.






- Disconnect the electrical connector to the engine coolant level warning switch (F66) on the bottom of the coolant reservoir and lay the reservoir aside with the coolant hoses - 1 - and - 2 - attached.

- Disconnect the electrical connector - 2 - for the oxygen sensor 2 catalytic converter and free up the electrical wire.






• Ignore - 1 -.

- Remove the noise insulation, to do this loosen the mounting fasteners - 1, 2, arrow -.






- Remove the oxygen sensor - 2 - with the special wrench (3337/1).






• To provide a better illustration, component location is shown from behind with engine removed.

Installing

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

• New oxygen sensors are coated with assembly paste; the paste must not get into slots of oxygen sensor body.

• For a used oxygen sensor, only coat threads with hot bolt paste. This paste must not come into contact with oxygen sensor slots.

• Wiring connection of oxygen sensor must always be secured in the same position when installing so that contact with the exhaust pipe is avoided.

• Tightening specifications, refer to => [ Oxygen Sensors Overview ] Oxygen Sensors Overview

- Install the noise insulation.