Hi, I accidentally found a rubber hose with a bolt on it, hanging free around the coolant tank area. The other side appears to go into the firewall. I amjust wondering what that baby is and where should it go? It's a 2000 A6 2.7t Tip. Thank you very much! I pulled it out a little bit and took a picture, as attached. Here is also what appears to be one the hose. I can't find the part based on the number though (because of wrong part number originally, infoadded later).

8D0 121 428 >AEM< (This is the correct part number, info added later)
ZD 25.03.98 1q00

[IMG]local://upfiles/44237/ACDBCE2AEC344485A731587F3D6EB550.jpg[/IMG]

 

Does your heater work? I honestly have no idea what it is, but my assumption would be one of the lines running to the heater core.

 

Everything works, as far as I know. Can anybody check the part number, if they have a bigger catalog? Thanks!

 

If it comes out of the bottom of the reservoir its a drain hose for the overflow in case the car overheats. If it were a coolant hose it would be puking coolant all over the place.

 

It look s like every capped Headlight - windshield washer hose I have seen..
Take the bolt out as see what comes out

 

I know one thing is that the engine bay surely could use a good cleaning!

OOOO