Just recently, I have noticed the car begins to hiss and release a gas of some sort into the cabin, I say it's a gas because it is often accompanied by harsh cough and watery eyes.

What could this hiss possibly be. The gas is odorless and colorless. Here is a video of the hissing noise. Can ...

Hello, I'm on this forum today to ask what this "refill spout" or whatever it is, is doing on the bottom portion of my bumber? As you can see the bottom part of the radiator behind it.