Oxygen Sensor: Service and Repair

Fig. 1:

UPSTREAM LEFT HAND

Remove
- Open the hood and fit a wing cover.
- Open the trunk and remove the battery cover.
- Disconnect the battery earth lead.

From inside the engine bay:
- Release the oxygen sensor multi-plug from the mounting bracket and disconnect
- Reposition harness from behind the lifting eye.
- Raise the vehicle.

From below:
- Remove the oil filter cartridge.
- Reposition the oxygen sensor harness and securing tie strap down the dipstick tube to access the tie strap. Cut and remove the tie strap.
- Undo and remove the oxygen sensor.

Refit
Fitting a new upstream oxygen sensor is the reverse of the removal procedure.
- Route the harness behind the dipstick tube.
- Fit a new tie strap in its original position.
- Route the multi-plug behind the lifting eye.

Fig. 2:

UPSTREAM RIGHT HAND

Remove
- Open the hood and fit a wing cover.
- Open the trunk and remove the battery cover.
- Disconnect the battery earth lead.
- Release the oxygen sensor multi-plug from the mounting bracket and disconnect.
- Reposition harness from behind the lifting eye.
- Reposition the harness to dipstick tube tie strap. Cut and remove the harness tie strap.
- Raise the vehicle.

From below:
- Undo and remove the harness clip securing screw and remove the clip.
- Route the harness from the engine bay.
- Undo and remove the oxygen sensor.

Refit
Fitting a new upstream oxygen sensor is the reverse of the removal procedure.
- Route the harness behind the dipstick tube.
- Fit a new tie strap in its original position.
- Route the multi-plug behind the lifting eye.