X5 & X7 Pedal Assist Sensor Installation.

The first step to replacing the P.A.S. is to remove the left side pedal stem

https://jupiterbikes.zendesk.com/hc/en-us/articles/16957575336717-Crank-Removal-and-Installation-

Once this is done, access your controller located inside the bike and trace the wire from the controller to the P.A.S. The P.A.S. is located behind the left side pedal stem. 

slide the P.A.S. off of the crank arm and remove the wire from the controller. Make sure to mark the wire so that the new P.A.S. is plugged into the same wire. 

Slide the new P.A.S. onto the crank arm and reinstall the pedal stem.