Ever since I almost bought (but didn't) an 01 with a bad Tip' I have been interested in this general topic. I have no first hand knowledge, so I when I say: "Yes, it will work fine as a direct swap", I'm actually making up stories and should not be trusted.
Then hit up the VW forums and Audi Forums for good measure. VW Passat Forums : Volkswagen Passat Forum has some pretty knowledgeable members. Just watch out for the BMW forums. They like to pretend they know stuff even though they are guessing.
...So yes, I'm sure it will work fine, plug-n-play.
Thanks for the response.
I actually swapped in the 2.5 tip and it works like a CHARM!
Will post up documentation one day, but today is not the day