Where are the sunroof drain holes on a Toyota previa

SOURCE: 2002 Toyota Sienna Sunroof

There are 4 drains on the sunroof (2 in each front corner, 2 in each rear corner).
If you want to check to see if they are clear, you can do this.

Get a squeeze bulb (about the size of a turkey baster) and squirt water down each drain, look for water draining out at the bottom of the car. For the rear drains, park the car on a slight uphill, and gently squeeze water down the drain trough on each side, here again, look for water draining out of the car.
If those ar clear, next step is to check the seal of the glass. The drains are only designed to take in a small amount of water, if there is too big of a gap between the panel and the body, it will over run the drain troughs (kind of like when the gutters on a house get stuff in them).

Finding water leaks is kind of a pain, but not if you take it a step at a time.
One thing to remember, water does not run uphill.

So to further water test it. Find a place where you can park it uphill or downhill, grab a flashlight, a friend and a hose.
Start at a low spot, and work your way around the sunroof (one person inside with the light, one outside with the hose). Just let the water run slowly, you don't want to use a nozzle or a spray.
Once you can see when the water starts leaking on the inside, you can narrow down the cause.

SOURCE: SUNROOF PROBLEM ( TOYOTA PREVIA ) 1991

i need to get a new sunroof fitted in my 95 toyota previa, does anyone know where

SOURCE: i have water leaking in through the sunroof of my

As with all sunroofs the seal doesn't last long and must be replaced. Note- with the roof open make sure the drain lines are not stopped up. There should be one on each front side and they go down inside the post on the side of the windshield.