This procedure does not apply to 2004 and earlier V6 models, as far as I know. In 2.0L four-cylinder vehicles, it is placed close to the alternator whilst in all other four-cylinder it is fitted at the center top of cylinder head. For the later V6 engines, the sensor is fixed on the left side of the rear cylinder head. Possible sabotage steps should be initiated from the side of the car manufacturer: to start with, one should unplug the cable connected to the negative terminal of the battery. If working on a Two point Oh European four-cylinder engine, then pull off the alternator. Third, remove the CHT sensor electrical connector and thereafter unscrew and detach the CHT sensor. 2.0L four-cylinder engine electrical connector needs to be unplug before unscrewing the sensor; for both 2.3L/2.5L four-cylinder engines, the sensor is between number 2 and number 3 spark plugs. The process of installation is as close to the process of removal as it can be, and, finally, the CHT sensor is tightened to the specified torque. Since the battery is disconnected and reconnected, the PCM requires relearn for idle and fuel trim to have more appropriate driveability and performance.