Check plumbing vent boots and roof vents if water is entering from that area to cause the leaking roof.
Sienna roof leaking.
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.
It is a combination of the sunroof drains being clogged the drain hose for the sunroof leaking and leaves stuck in the fenders.
200 toyota sienna xle with sun roof and roof rack.
Warning be sure to check which.
Actually it s a speedometer cable found at any auto parts store for about 8 snake out a really stubborn clog with a speedometer cable.
These are very small holes usually at the corners of the sunroof just under the seal step 3 blast compressed air through the drain tubes located at the base of the sunroof seal.
The leak was fixed by removing the roof rack and sealing between two body panels on the roof that meet up.
Wipe it with a cloth to remove any visible debris on the seals and edges of the sunroof 1 x research sourcestep 2 locate the sunroof drain tubes.
It is designed to catch water that gets through the sunroof.
Open up your sunroof clean out the trains thoroughly.
Accumulates near door sills.
Water leaking and pooling in front compartment both driver and passenger sides.
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.
I am the person who purchased the 08 sienna that this original thread was posted about.
Prior to that had strong odor in compartment like cigarette smoke.
Look for cracks in the base of flexible rubber flashing or broken seams in metal varieties of vent pipe flashing the rubber gasket that surrounds the vent pipe could be rotted.
Noticed accumulation 2 months ago has gotten worse.
If that doesn t do the trick try running a very small flexible plumbing snake down the tube to break up the clog.
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.
2 x research source these tubes.