1996 toyota previa 2.5 petrol belt or chain driven

Toyota has a chain. Honda has a timing belt.

There is no cabin air filter on that vehicle.
RPM gages are an option and may or may not be present.
The engine is a 4 cylinder and most 4 cylinder engines have BELTS,

its a chain
Nissan 3 5L timing chain update

chain driven or cam belt

It is confirmed that it is a timing belt.....what made you think that it was a chain driven. ????? As long as it's V6 petrol engine, it is timing belt.

ALL MOTORS ONE TIME OR ANOTHER NEED TO BE CHANGE SOME CARS MANY TIME YOUR ANSWER YES IT DOES

CHAIN

I believe it has a timng belt and the interval for replacement is 100,000 miles.

here is a picture:
http://media.photobucket.com/image/97%20toyota%20previa%20diesel%20timing%20belt/Fabitop55/TimingBeltDiagram.jpg

yes cams are at front with the timing belt. not like motorcycles in the middle. I havent had many problems with them where I am. But a water loss in the engine is serious. If your sure the loss is internal then you have to tear down.

The 1.8T is very common in the US. We don't have any diesels here in the A4, but the 1.8T is all over the place.

What exactly do you need to know? You were posting it in the title to your question but it got cut off and I don't know exactly what you're looking for in terms of info for changing the cam chain. If you mean the timing belt, that's a belt, not a chain. I thought that the 1.8T drove both cams off of the belt, unlike the 2.8, where only the exhaust cams are belt-driven by the timing belt, and the intake cams drive off their respective exhaust cams via a chain and tensioner assembly. If you can clarify this, we can proceed.