I'm pretty sure that my '01 US model came from Mosel, but I'll have to check again. I think that all the US models I've seen come from Emden or Mosel/Zwickau. Funny bit of trivia is that the Mosel plant is near the site where Trabants were built from the 1950s through 1991.If you have a north american Passat, it should have been built in Emden IIRC.
Others could be Mosel/Zwickau or Slovakia
Currently being built at Wolfsburgstrange bit of trivia this is as no one mentions Wolfsburg which is the biggest factory in germany, are there no passats built here????