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Interior Water Leak - Passenger Footwell

New M3P, took delivery 3/13/21. During car wash or rain, water leaks into passenger footwell from behind dash as shown in video link and pic below. Have been to service center twice, they are unable to replicate the issue and find where the leak is coming from. 3rd SC appointment scheduled 5/12. Larger concern is water than may be trapped behind dash, and where it may travel. Suppose there can be potential for mold as well. I've come across another thread with the same problem but did not see the issue was ever corrected. Thought I would begin a new thread that included a pic & video. About half of the water drips behind floor mat and is not visible in pic. Must wait for 4 unsuccessful repair attempts before perusing Lemon Law in NYS. In the meantime, I am stuck with a vehicle that cannot be driven in the rain or washed, even by hand. There are several complaints online of same issue, but yet to come across the resolution. Any feedback would be greatly appreciated as although the service center is trying, I am not confident they will be able to fix the issue.

New video by Joseph Durse

PXL_20210424_163025237.jpg
 
  • Informative
Reactions: KenC
Thanks KenC, I appreciate it. The windshield was my initial inclination as well. The SC examined it during both appointments and on my 2nd visit reapplied sealant in the area along the bottom where they stated it was lacking, but it did not correct the issue. They state they've never seen nor heard of this issue, even though it's pretty easy to find other complaints online. They're at a complete loss in terms of how to fix. I'm extremely disappointed as I love the car, but this is unacceptable.
 

KenC

Active Member
Sep 4, 2018
4,230
3,932
Maine
As I mentioned, water can travel a long way along a seam. It may not be the bottom of the windshield.

Finding a leak, whether it's an air leak in a tire or water leak is always difficult. Maybe try a non-staining food dye or something and test sections of the windshield.
 
New M3P, took delivery 3/13/21. During car wash or rain, water leaks into passenger footwell from behind dash as shown in video link and pic below. Have been to service center twice, they are unable to replicate the issue and find where the leak is coming from. 3rd SC appointment scheduled 5/12. Larger concern is water than may be trapped behind dash, and where it may travel. Suppose there can be potential for mold as well. I've come across another thread with the same problem but did not see the issue was ever corrected. Thought I would begin a new thread that included a pic & video. About half of the water drips behind floor mat and is not visible in pic. Must wait for 4 unsuccessful repair attempts before perusing Lemon Law in NYS. In the meantime, I am stuck with a vehicle that cannot be driven in the rain or washed, even by hand. There are several complaints online of same issue, but yet to come across the resolution. Any feedback would be greatly appreciated as although the service center is trying, I am not confident they will be able to fix the issue.

New video by Joseph Durse

View attachment 658031
I also have exactly same issue for my new 2021 Model 3 that I got it on May. Took it to service center and they are saying there is nothing to fix. Told me to hand wash the car. The issue is caused by too much water dumped and filled the drain, it can flow into interior of the car if car run without draining the water after the car wash. I think this is design flaw, but that is my personal opinion. I am now hand washing my car... leak stopped...
 

Sorny

Member
Jun 2, 2021
75
107
MN
I also have exactly same issue for my new 2021 Model 3 that I got it on May. Took it to service center and they are saying there is nothing to fix. Told me to hand wash the car. The issue is caused by too much water dumped and filled the drain, it can flow into interior of the car if car run without draining the water after the car wash. I think this is design flaw, but that is my personal opinion. I am now hand washing my car... leak stopped...
That's BS... the car is leaking and it should not be. Don't accept that BS excuse.

My car doesn't leak, and we've had some HEAVY rainfall and I can run through carwashes without any water getting where is it not supposed to go.
 
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Reactions: adayley
I hate incompetent technicians. Im a technician myself - and the only thing I touch that I dont understand is women :) I wonder if US mechanics - Tesla employees?- is less competent than those here in Denmark?

My Model 3 Performance delivered in March 2021 as OP. I bought 4 weeks ago in February 2022. After first heavy rain, both footwells were soaked in water. Waiting time to service center was 4 month, but was lucky to get a time only 4 days after.
At SC, after 30 mins of examination, cause was clear. Windscreen was leaking an had to be reglued an car dryed.

Be aware!!! : By simple coincidence, I met my old good friend, which I havnt seen for 10 years. He was a technician at Tesla. He said they would just try to reseal the leak while windscreen in car. But he insisted it was done proberly, so windshield was cut out and instead out resealed and new windshield were installed.

water ingrees was similar to running behind dash like OP. But is now bonedry.
Insist they do a proper job and reseal complete windscreen instead of trial and error with patching sealant here and there.

Hope it helps!

Sorry for my spelling - I practice every day :)

Cheers, Nick
 
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Reactions: KenC

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