Grey piece on outside mirror

[Bpiet378]

I just noticed this and wondering what it is. It’s on drivers side mirror only by the lights underneath the mirror. I see the area on my buddies truck but no grey piece like in mine. What is it?

 

[MannymanX]

Outside temperature sensor.

 

[Rsorrell2]

Think it might be where the surround camera would be

 

[MannymanX]

Think it might be where the surround camera would be

I guess my post wasn't reliable enough. here are some pics.

Sensor:


How to remove: