Vacuum lines
 

Hey guys...does anyone know the inner dimensions of all the small vacuum line hoses on a 2000 a4 quattro 1.8t? Or know were i an find out. I wanna replace all mine and not sure of all the sizes. Is there some place that lists all the hose and line sizes?

You can just cut a small piece off of one and then take it to the part store for an exact match.

Pretty sure the 2.8 has 3.5mm. Not sure why it wouldn't be the same for the 1.8.

I bought a bunch of 3mm ID stuff by accident and it worked too so that should be okay in a pinch.

K...thanks

^^^ correct, 3.5mmID