Water leak after it rains

I had this issue with a 2002 Sienna (different generation) than yours but a common issue. I went through many warranty visits and never solved the issue. I read a blog that said it was in the back by the rear hatch area. I found that to be true because the rug was wet all the way up the floor in a couple strips. I siliconed inside the door frame and on the roof in between the luggage rack slots and it seemed to slow the amount of water. I would park it on a hill with front up when I knew it was going to rain. I would still get drips down from the light area on my first downgrade of the day. Had issue for 12 years.

Use a hose to locate the leak

Have been dealing with this on a 2004 XLE Limited. It is a combination of the sunroof drains being clogged, the drain hose for the sunroof leaking and leaves stuck in the fenders. 1. open up your sunroof, clean out the trains thoroughly. 2. open up the headliner and re-seat the clear(yellowish) rubber hoses that connect to the sunroof drain. There may be 4 hoses, 2 in the front, 2 in the rear of the sunroof. 3. open up fender cover near A-pillar. Clean out all leaves from fender.

I’ve got a 2011 sienna that’s allowed rain in for a few months now. Thanks for the information on where to check

I had this problem in my brand new 2014 Sienna, dealership couldn't locate the leak. I gave up on them and did it myself. Wasnt the sunroof. Found the leak in the luggage rack foot attachment. I pulled the feet up and the area under the bolt/washer was RUSTED from all the water having been collecting there over the years. The POS plastic "seal" under the feet come loose and do nothing to seal the water out. I bought some liquid gasket and sealed up all round the attachment fastener locations as well as around the STUPID locator hole for the seal.

how did you remove the roof rack foot without damaging it?

MY 2012 Toyota sienna leaks in the back truck, I believe it the gasket around the frame of the back door. Does anyone know why water would leak from the top of the back truck door?

I got a 2009 Sienna - 85k miles - a couple of months ago, and recently noticed I was taking on water in the rear. Took a hose to it, starting at bottom of liftgate and working my way up, opening the liftgate to check every few inches. When I got the hose to the top of the liftgate, and before I reached the roof rack pillars, I started getting water inside. Quickly noticed that it started at the top rear just inside the liftgate. The source appeared to be the larger of the two electrical "raceway" grommets at the top of car, between the liftgate hinges. The seal was just terrible where the grommet met the body of the Sienna. Took some Gardner-Bender Duct Seal and applied it around that grommet, and the other smaller one also, to be safe. I just happened to have some Duct Seal around. This is exactly what electricians use all the time to seal things like the service cable entrance on top of electrical meters outside, even though some small print on their product sheet says it's not for outdoor use. G-B is probably just protecting themselves from lawsuits, because the stuff just works real well for that. It's soft and pliable, kinda like Play-Doh, but it never dries out. So far it's working for me. Just happens to be raining now, but when it's dry outside I'll probably apply this stuff to the top grommets (on the liftgate itself) as well. NOTE: the area should be wiped dry and free of dirt or dust when you apply it. It doesn't stick well when the surfaces are wet. In case you're curious, as I've got it applied, the liftgate doesn't touch it at all when it closes. BTW have now put a couple thousand miles on my Sienna and I love love love to drive the van. I have had prior experience driving these, so I'm not surprised. When I don't need the cargo space, though, I typically drive my "old" 03-04 2.4L Camrys, coz they get better mileage - no surprise there either. Hope I don't have any further water leaks. You can get Duct Seal easily at big-box hardware stores or electrical supply stores. And it's really cheap. Comes in 1 lb. bricks for about 3 bucks. Disclaimer: I don't work for them or have any other financial interest in the product. And as usual, your mileage may vary.