Thanks so much for the reply. It looks like it's part 19a (nipple) in the part5.pdf diagram. However, the nipple of my Volvo has a 90' bend and goes into the top, rather than the side, of the housing. I attempted a fix using a vacuum elbow, a rubber hose, and silicone which seems to have stopped the...

This just happened to my 2002 S80 T6. Did you ever figure out the part name/number and how to fix it? Thanks!