Welcome! There is a FAQ article on PD camshaft replacement. FYI, if your 03-04 Passat is a 2.0L engine, it might have the balance shaft issue as well, I don't know what engine it used, see the FAQ section for some background on it.
How's the cam replacement going for you? I'm wondering which cam you went with, followers, etc and oil used previously, mileage on engine....stuff like that.
My own PD cam is quite badly worn with only 88K miles and I'll be doing the change soon.
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