Disconnect the cable from the negative battery terminal. Remove the air filter outlet duct, then disconnect the charge air cooler inlet pipe. Pull back the insulator (if equipped) from the CHT sensor electrical connector and disconnect the connector. Unscrew the CHT sensor from the cylinder head. When installing the CHT sensor, tighten it to the specified torque, with installation being the reverse of removal. For 3.5L V6 models, the CHT sensor is located in the rear cylinder head below the intake manifold. Disconnect the cable from the negative battery terminal again. Remove the lower intake manifold and disconnect the CHT sensor electrical connector. Unscrew and remove the CHT sensor, then reinstall it by reversing the removal process and tightening the sensor to the specified torque.