Ambient Air Temperature Sensor
WARNING: This page is about a different car, the 2010 Land Rover Range Rover Sport. However, it is still accessible from the selected car via links, so may be relevant.
The ambient air temperature sensor is a negative temperature coefficient (NTC) thermistor that provides the automatic temperature control (ATC) module with an input of external air temperature. The sensor is attached to a bracket on the rear of the bumper beam, on the vehicle center-line.