(even on 4mo cars because the all wheel drive system is haldex...which means its FWD biased unless it detects slip).
Though a bit of an aside, the information quoted above is incorrect. B5 and B5.5 Passats with 4mo are Torsen systems, not Haldex. This means that the mechanical center diff sends power equally to the front and rear under normal conditions.
Many newer transverse engined chassis use the Haldex electronic 4wd system.
Edit: oops, missed hu vws post saying the same thing.
There is no rear sway bar on the passat (even on 4mo's), so the way they compensate for that is by increasing the rear tire pressure.
This information is also incorrect. The 4mo Passat is equipped with a rear sway bar from the factory.
To say that the fwd does not have one is true, but also a bit misleading. The torsion bar rear suspension essentially acts as a rear sway bar, limiting suspension travel on one side relative to the other as the beam flexes.
As for rear tire pressure, my wagon lists two different numbers. One is for "half load" and the other is for "full load". Obviously you would inflate the rear tires more for a long road trip with a heavily loaded cargo area. I'm not sure if the sedan is similar or not with the smaller cargo capacity.