1] Remove the screws from the lid and remove the lid assembly from the base.
2] Remove the connector from the O2 sensor PCB.
3] Rotate the port connector anti clockwise and remove.
4] Remove the O2 cell and PCB assembly from the lid.
5] Remove the O2 cell from the PCB.
6] To fit a new O2 cell, repeat steps 1 to 6 in opposite sequence.
Please see page 36 in the service manual for the step by step guide with images.
Please watch the video below:
https://www.youtube.com/watch?v=8QM9uhqF6SU