What is it?

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10SpdsOfFury

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787565BD-5A92-4CA6-AFEB-DD20FFF38AC2.jpeg For some reason the sun hit this spot just right and I noticed this but never noticed this vent before on my 17 or 19.

any ideas
 

4rdFan

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It is a interior temperature and humidity sensor. Fun fact: The sensor assembly actually has a small motorized impeller fan that passes air over the thermistor and the humidity sensor for a more accurate reading of the cabin temperature. You can see it as the circular object in the picture above, towards the rear of the sensor assembly.
 
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