▶Compatible models:For Buick 2 Pin Ambient Air Temperature SensorOEM:8678854Type: The ambient air temperature sensorMaterial: ABS plasticPackage Included: sensorfeature:A copy of the original manufacturer's standardgood working conditionsEasy to install.The ambient air temperature sensor (ATC) is a negative temperature coefficient sensor (NTC) that informs your vehicle and the interior temperature sensor of the temperature of the outside air. This enables your automatic/semi-automatic climate control system to adjust the vehicle's temperature and blower speed. When there is a problem with your ambient air temperature sensor, your air conditioning system may not be working properly.Intake air temperature sensor detection method1. Turn off the ignition switch, disconnect the intake air temperature sensor harness connector, and remove the intake air temperature sensor2. Put the intake air temperature sensor into the water to heat3. Use the resistance curve of the multimeter to measure the resistance between the two ends of the sensorhint:1. Please check your model carefully or check your part pictures, part numbers before purchasing to avoid purchasing mistakes and unnecessary costs.2. If you find the part does not fit your car when you receive it, please send it back with good packaging.3. If there is a problem with the installation, you can seek professional help.