Oxygen Sensor before Catalytic Converter, Bank 2

Oxygen Sensor before Catalytic Converter, Bank 2

Special tools, testers and auxiliary items required

• Ring spanner 7-piece set for oxygen sensor (3337)

Removing

- Remove rear engine cover - arrows -.





- Remove coolant expansion tank - arrow -.





- Disconnect electrical connection from Engine Coolant Level (ECL) warning switch (F66) at bottom of coolant reservoir and set aside coolant reservoir with coolant hoses - 1 - and - 2 - connected.

- Disconnect electrical harness connector - 1 - for Heated Oxygen Sensor (HO2S) 2 (G108) and free up wire.





• Ignore - 2 -.

- Remove oxygen sensor - 1 - using ring spanner set (3337).





• To improve clarity, the engine is shown removed.

Installing

Installation is in reverse order of removal, note the following:

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

• When reinstalling the previously used oxygen sensor, coat thread with hot bolt paste. Paste must not get on to slits of sensor body.

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

Tightening Specifications