While changing the oil, I was doing a general inspection of the engine bay and noticed this white line/tube in the upper left corner that has started to disintegrate and I could use some help identifying the component. I found a random photo online and added arrows to what I'm refering to. Any help would be much appreciated. TIA!

 

(phone app link)

 

Small image, but the image title gave me what I needed. Thank you!!

 

Then click the text below the image, and it'll open much larger with the option to click again & go supersize.

 

Awesome! Thanks again.