It's quite straight forward but it's in a tight space (need small hands).
To remove exisitng belt:
Have a look at this site for a detailed guide to changing the timing belt and other servicing matters. http://www.taligentx.com/passat/
how do you remove a 1999 vw passat radio
This is the timing belt, I think. Takes a lot of expertise. Get the shop manual. If you screw it up, you can damage the engine.
Yes
I have a 2004 Passat Diesel and it cost £160 for the replacemnt belt from a VW approved garage.
If it's on a 1.8 T I'll include an instructional video below in the "Related Links" section. Hope this helps you out.
vw recomend 100.000 but should be done at about 80.000
when should I change the cam belt on a 2002 VW Passat 1.8S with 48000 on the clock
$90 bones
timing chain
http://phatcat_ed.tripod.com/V6.htm
According to the owners manual, 2005 Passat TDI timing belt needs changing on the 100,000 mile service.