Oxygen Sensor before Catalytic Converter, Bank 1

Oxygen Sensor before Catalytic Converter, Bank 1

Special tools, testers and auxiliary items required

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

Removing

- Remove rear engine cover - arrows -.





- Disconnect check valve - 1 - from air duct hose.





- Remove air duct hose, thereby loosening hose clamp - 2 - and opening clips - arrows -.

- Remove bolts - arrows -.





- Remove air duct - 1 - and - 2 -.

- Open clips - arrows - and remove upper part of air filter housing.





- Disconnect electrical harness connector - 1 - for Heated Oxygen Sensor (HO2S) (G39) and free up wire.





• Ignore - 2 -.

- Remove oxygen sensor - 2 - using ring spanner set (3337).





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.

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

Tightening Specifications