Quote, originally posted by woodardhsd » These golf/jetta guys have it easy.
On a passat, it is between the firewall and the valve cover, to the right of the combi-valve. It's easiest if you remove the breather hose and disconnect the coil-pack harness and pull it out of the way.
Oh yeah, have really small hands.
Search at passatworld.com for more info
paid 36$ at my local dealer for o ring and green top. he even told me they sell em like crazy!