2001 A4 1.8T

I was changing my oil today and saw a crack on a hose, I pushed a little on it to see if it was a rubber hose or hard plastic. It was hard plastic but the whole elbow pushed out. It looks easy to replace, the number on the side is VRT 058 133 758 8, any idea where I could find this? I was able to put it back in place and I don't think it will easily come back out but I can feel and hear air coming out when the car is running.

 

That bad boy should be rubber. You can get a replacement at the dealer OR go to an autoparts store and get some heater core rubber hose (should be big enough just take the piece with you to match size) since its reinforced tubing and it should work just fine

Edit* I'm pretty sure that pipe runs from there, along the back, and to the other side of the motor for the pcv system, so I'd have it fixed soon

 

It's hard plastic. What's it for?