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See below for picture of write up.

Long story short I have a 2018 Corolla XSE with 21,800 miles (I bought the car new it is 1.5 years old) and one morning noticed pools of water in ever crack in the all weather floor mat. Then a couple days later I saw drips of water coming down from the plastic to the right of the shifter that meets the carpet so now I know there’s a leak. The car is under warranty why bother taking apart myself right? I bring it to the Toyota dealership, they look at the car and come back with the overly polite news of... so we looked at it and these cars do not have water sealed sunroofs. The water gets in and there are drains that go down to the dashboard that dump underneath the car. They are clogged with leaves and other stuff so that’s why the water is leaking on the floor. Since it’s the leaves that are clogging the drainage system they cannot cover it under warranty because it’s not their drains that failed it’s the leaves that clogged the system. I asked did you clean the leaves out of the system at least as a courtesy move? No we didn’t. We would have to take apart the interior and dashboard and carpets and replace anything with mold, a specialist would come in and put chemicals in the car to get rid of the mold and it’ll all cost about $3,000-$5,000. We advise you to call your insurance and they’ll cover it all (they kept saying how easy and quick it would be if I just went through insurance). Thanks for wanted to use my insurance policies liability I mean come on Toyota if I can’t keep a car outdoors without the possibility of it leaking inside and you blame leaves? What is that, it’s not a 20 year old convertible.

I hope you all enjoyed this little interesting and funny start to a funny story. This all happened today so stay tuned for more and please feel free to chime in!

73DF54C6-4692-416C-BF9F-A9DF0BF3A5EA.jpeg
 

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Discussion Starter #3
This is the reason I have never or will never own a vehicle with a sun roof or t tops. They look cool and are somewhat functional but in the end a PITA.

Sent from my VS996 using Tapatalk

Agreed, what a silly way to learn that lesson. Multiple service advisors were telling me this issue has been happening for years on all models. Some leak that don’t even have sunroofs or convertibles but it’s because of leaves clogging the drains from the windshield. One advisor told me she’s had 4 Toyota’s all of which had this exact issue and of course all 4 were not covered under warranty due to the “outside influence” being leaves.
 

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Discussion Starter #5
I have a camry with sunroof and never experienced this. Where is the leaves clogging the drain? Your case seem severe.
I am not sure of the location of what they claim to be a clog. Maybe it’s just me but if the drainage system was that clogged with leaves and debris the water leaking out of the dashboard would be a dirty brownish color. The water that I can see leaking and pooling on the rubber mat is perfectly clear.
 

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I am not sure of the location of what they claim to be a clog. Maybe it’s just me but if the drainage system was that clogged with leaves and debris the water leaking out of the dashboard would be a dirty brownish color. The water that I can see leaking and pooling on the rubber mat is perfectly clear.
You should go back to the dealer and have them show you. This problem happened to ford owners but never heard with toyota owners
 

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I would ask the dealer to use a smoke machine and prove its not the sunroof drain.

The only logical source of problem is it could be the front windshield.

IME, there was a sunroof drain problem in my past. But, never noticed that it would back up. It's very difficult for leaves to get into the sunroof drain. The ID is too small.

Let them prove its the leaves.
 

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Pop called a boat " a hole in the water you pour money into" I think the same applies to sunroofs. Started working on cars in April 1969. I have seen damage from leaves that sent cars to scrapyards, with rusted out cow panels as well as sunroofs. If your going to park it where leaves can accumulate, then take preventive measures to protect from the situation repeating itself.

It may NOT be covered by your insurance company and the estimate to repair seems a little crazy to me. Stop the leak, crack the windows, let it sit out in the sun and bake and the mold will die.

Find out where the drains exit under the car and blow them out with compressed air (reverse of normal drain flow), then clean the debris from the trough around the sunroof and park it in the sun. Maybe spray some mold killer on the carpet if the mold persists.
 

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Discussion Starter #9
You should go back to the dealer and have them show you. This problem happened to ford owners but never heard with toyota owners
Yes I have heard of Ford owners having the issue as well. I am going to try another local dealer today and see if they will be more willing to help me out but I will certainly use your advise and have them show me the issue.
 

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I would ask the dealer to use a smoke machine and prove its not the sunroof drain.

The only logical source of problem is it could be the front windshield.

IME, there was a sunroof drain problem in my past. But, never noticed that it would back up. It's very difficult for leaves to get into the sunroof drain. The ID is too small.

Let them prove its the leaves.
Agreed I will bring that up, I don’t even see a place where leaves do or would accumulate anywhere around or in the sunroof. I think they made that one up.

I’m just glad they broke a clip under the dash and didn’t even notice that the interior plastic is hanging on the floor along with the clip and don’t forget the beautiful oily fingerprints all over the headliner, passenger door panel, and leather seat.
 

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Discussion Starter #11
Pop called a boat " a hole in the water you pour money into" I think the same applies to sunroofs. Started working on cars in April 1969. I have seen damage from leaves that sent cars to scrapyards, with rusted out cow panels as well as sunroofs. If your going to park it where leaves can accumulate, then take preventive measures to protect from the situation repeating itself.

It may NOT be covered by your insurance company and the estimate to repair seems a little crazy to me. Stop the leak, crack the windows, let it sit out in the sun and bake and the mold will die.

Find out where the drains exit under the car and blow them out with compressed air (reverse of normal drain flow), then clean the debris from the trough around the sunroof and park it in the sun. Maybe spray some mold killer on the carpet if the mold persists.
Thank you for your reply Old mechanic I appreciate your input along with everyone else’s!

I agree and understand exactly what you’re saying I know cars aren’t perfect. My issue is this dealership completely delegating all liability into the customer or the customers insurance but maybe I’m in the wrong thinking they should cover this repair or at least clear the leaves out under warranty.

Either way I’ll have to use your advice and stay away from trees and stay on top of cleaning out the drainage systems. Silly issue on a 1 year old car but you can’t win them all I guess!
 

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When fixed the causes and solutions will be known and then you can react to those who disappointed you with facts they can not refute, or just consider it an experience you can prevent in the future. If you don't feel comfortable take it to a body shop, my buddy would clear the drains out while you watched, for probably less than 50 bucks.
 

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When fixed the causes and solutions will be known and then you can react to those who disappointed you with facts they can not refute, or just consider it an experience you can prevent in the future. If you don't feel comfortable take it to a body shop, my buddy would clear the drains out while you watched, for probably less than 50 bucks.
That may be the way to go. Just went to a 2nd dealer and they wouldn’t even look at the car without charging me since I was already in the system with my issue that isn’t covered. Pulled both front carpets and both front carpets are soaked and it hasn’t rained in days here. Rear carpet feels dry to the touch but not sure what it looks like underneath. Will keep updating the thread.
 

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Sorry to hear that the first dealer did you dirty by putting this in the system. What part of the carpet is most damp? Towards the firewall or the kick panel? Any signs of the headliner getting damp? If the headliner is damp, then I would agree it's the sunroof drain. But if it's on the firewall, then it's leaking elsewhere.

Open your sunroof and look for the drain ports. They should be close to the corner of the chassis. There's 4 ports.

Take a metal coat hanger and thread it through the hole. Do that for a minute or so. Then pour some water down the hole and look under your car near the front suspension to see the flow. Do the same for the rear. The flow should exit at the rear bumper.
 

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Sorry to hear that the first dealer did you dirty by putting this in the system. What part of the carpet is most damp? Towards the firewall or the kick panel? Any signs of the headliner getting damp? If the headliner is damp, then I would agree it's the sunroof drain. But if it's on the firewall, then it's leaking elsewhere.

Open your sunroof and look for the drain ports. They should be close to the corner of the chassis. There's 4 ports.

Take a metal coat hanger and thread it through the hole. Do that for a minute or so. Then pour some water down the hole and look under your car near the front suspension to see the flow. Do the same for the rear. The flow should exit at the rear bumper.
Hi thank you for your reply.

Headliner is dry. Kick panel on driver and passenger side have water lines about 3 inches up and the padding behind the kick panel is soaked on both sides. 1 inch deep puddles of water are accumulating at the lowest part of the floor board in the front seats which is closest to the seat itself. What worries me is the water is dripping past electrical components in the dash but I still can’t source where the water is coming from nor can I replicate the leaks with a hose or with the AC being on. I’ll post pictures of what I have so far

I have the carpet up and interior out right now. I fished a line down both front drain ports which seemed to be clear then sprayed down the two front holes with a hose and it was draining identically onto the ground on both sides behind the front tires so It seems as if the front sunroof drains are working correctly
 

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VERY IMPORTANT.

You have checked the front drains, now check the rear. If they are clear then the dealership is at fault for misdiagnosing the problem.

If you can't duplicate the leak around the sunroof, then the dealership has a big problem. They blew you off and left you with a mold ridden car that has not been properly diagnosed.

You have already made two trips to Toyota dealerships and your issue has been refused service. GET IT FIXED NOW.

If it was my car I would take it back to the original selling dealership and tell them you have checked the sunroof and the drains are fine. If you can't make it leak with a water hose, then it may only be leaking in rainfall and wind pressure created by moving through the air. Could be the windshield seal is defective.

What is the highest point where you have seen water, above the kick panels 3 inch level?

If they blow you off again go to the better business bureau and start a lemon law action against Toyota. They are allowed 3 attempts to fix the problem, so if they blow you off again, their asses will be handed to them in any legal action. You know their diagnosis is BS since you figured that out yourself, it is very hard to discount first hand legal evidence and they need to listen carefully to your problem and put a problem solver on the repair.

Sounds like the NHSTA (national highway and traffic safety administration) might need a call about your water logged Toyota and the potential for a wiring fire or god only knows what the long term mold exposure could do to you or your loved ones They would not forget me at that dealership..
 

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VERY IMPORTANT.

You have checked the front drains, now check the rear. If they are clear then the dealership is at fault for misdiagnosing the problem.

If you can't duplicate the leak around the sunroof, then the dealership has a big problem. They blew you off and left you with a mold ridden car that has not been properly diagnosed.

You have already made two trips to Toyota dealerships and your issue has been refused service. GET IT FIXED NOW.

If it was my car I would take it back to the original selling dealership and tell them you have checked the sunroof and the drains are fine. If you can't make it leak with a water hose, then it may only be leaking in rainfall and wind pressure created by moving through the air. Could be the windshield seal is defective.

What is the highest point where you have seen water, above the kick panels 3 inch level?

If they blow you off again go to the better business bureau and start a lemon law action against Toyota. They are allowed 3 attempts to fix the problem, so if they blow you off again, their asses will be handed to them in any legal action. You know their diagnosis is BS since you figured that out yourself, it is very hard to discount first hand legal evidence and they need to listen carefully to your problem and put a problem solver on the repair.

Sounds like the NHSTA (national highway and traffic safety administration) might need a call about your water logged Toyota and the potential for a wiring fire or god only knows what the long term mold exposure could do to you or your loved ones They would not forget me at that dealership..
I will have to check the rear sunroof drains tomorrow night I had to button the car back up for the night. I have a fan blowing the inside with the windows down hopefully to dry the carpets out by morning.

I sprayed a hose in the two front sunroof drains for about 2 minutes each which in my opinion seems like a significant amount of water to flow through that drain system. It had a strong steady flow where it should underneath the car. Upon further inspection after that test was performed I pulled the panel off around the door frame where the window airbags are and could spot water in a couple spots (see picture on this post) but again I sprayed A LOT of water directly into those holes.

I was also able to trace water spots going down the door jam and onto some of the grounded wiring ( see pictures on this post) but it wasn’t a flow of water. But maybe it’s just enough dribble that after an entire day of pouring rain it creates puddles on the driver & passenger side floors.

sorry the pictures aren’t great and it’s hard to see the driblets of water spots but maybe you can understand what I’m talking about. The drops make there way down to the floor near where the black box is that holds all of that wiring in one of the pictures.

Other then those little drops here and there the highest point I can find is that entire kickboard pad that runs along the center console on driver and passenger side both are soaked. What weird is I can’t find any water above those pads as in anywhere up in behind the dash behind the radio area which I where I would assume it’s coming from because I’ve actually watched water drip down from that area while I was driving the other day. And again it wasn’t even raining! I have a video of that if I could find a way to post it on here.
 

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Has the windshield been replaced since the car was new?
windshield had not been replaced. Nothing has ever been done to this car except for oil changes. No brakes, no windshield wipers, no air filter nor cabin air filter changes... nothing but oil changes.
 
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