Take off the third pillar molding and the left rear coat hook, if present, in order to remove the Auxiliary Inside Air Temperature Sensor Assembly. Next, remove the rear headliner retainers from the front headliner and quietly slide the headliner down the retaining Velcro of the roof. Pull the electrical connector from the inside air temperature sensor and partially remove the sensor from the headliner. Next, there is the sensor grille to take the auxiliary inside air temperature sensor out altogether. First fix the new sensor grille to headliner and afterwards the in side air temperature sensor to headliner and sensor grille. Reconnect the electrical connector to the inside air temperature sensor then secure the headliner to the roof Velcro, as well, reinstall the rear headliner retainers to the front headliner. If available, reinstall the left rear coat hook and lastly, the third pillar molding.