They do but as the Passat is bigger it would need to have the 2.0TDI which is the less reliable especially when in the larger cars
Hmm.. the pre 2008 2.0 TDI was a PD version with potentially iffy injectors and an oil pump issue in certain ones that was subject to recall IIRC. However since 2008 it’s a different Common Rail unit. They all say 2.0 TDI on the back though and many dealers don’t even know the difference. You should easily be able to tell the difference from the sound of the thing though.
I didn’t think the newer engine was unreliable though?
Anyway they were available with a 1.9 engine which was reliable too iirc. Bit slow, but driveable.
EDIT: if you want reliability and comfort, look at Honda or Toyota perhaps? Civic, Accord, Avensis, Prius? Although I’m not sure Civics are up to normal Honda standards, but this could’ve improved with newer models.