Newbie to a3 what is this hose?

[Adamski898]

Hi ladies and gents just brought an a3 1.8t aum engine, what is this hose and what should it be attached to? Many thanks!

 

[Adamski898]

If anyone needs more info just ask thanks

 

[SteVR]

It originally went to the airbox. As you have an after market airfilter most people run a little breather filter at the end of the hose.

 

[Adamski898]

Thanks steVR