Any ppl know what is this use for? there is a rubber tube under this electronic parts, it just an inch long, seems been cut. The original it connect to which part?
Pls help

Barometric pressure sensor.

Tube doesn't connect to anything :)

that means the tube below the sensor with 1 inch long is normal?

Yes....... Just keeps some of the dust/crap out of the sensor

thank you man!