Official Fix: Tonneau Leak Foam Seal

[T35L4]

Is this true and real that Tesla will officially fix the leak issue? Who has gotten this done officially besides this person?

From TorqueNews

Saw this:

After years of complaints from Cybertruck owners, Tesla is finally implementing a fix for the tonneau cover water leak issue. The EV maker is applying foam sealant to some Cybertrucks to prevent water from entering the vault...

....
Repair Notes:

The technician inspected the vehicle and verified excessive water entering the truck bed, with the tonneau cover not operating as expected.

The cause was inadequate sealing on the upper tonneau applique. The technician applied sealing foam to the applique and tested to confirm that water ingress had been resolved. The repair was validated with no further leaks detected.

Correction: Test To Confirm Water Ingress No Longer Present

Correction Diagnosis: Water Ingress/Leak - Interior

Correction Applique - Upper - Tonneau (Long Range) - Remove and Install.”

Given that many Cybertruck owners are facing tonneau water ingress issues, it’s good to see Tesla addressing the problem by simply applying a foam sealant to the upper tonneau applique.

What is even better is that we can see on the service note that Tesla performed this repair for free under the basic vehicle warranty.

Additionally, the service note also shows the minimum work and parts needed to stop the water leak.

Tesla service writes…

“Parts Replaced or Added

Part

SEALING FOAM(1098720-00-B)

Quantity

2.00”

This is wonderful news; however, looking at the comments, fellow Cybertruck owners continue to voice their frustration with Tesla.





https://www.torquenews.com/11826/te...on-tonneau-cover-water-leak-problem-foam-seal

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[Gigahorse]

Is this true and real that Tesla will officially fix the leak issue? Who has gotten this done officially besides this person?

From TorqueNews

Saw this:

After years of complaints from Cybertruck owners, Tesla is finally implementing a fix for the tonneau cover water leak issue. The EV maker is applying foam sealant to some Cybertrucks to prevent water from entering the vault...

....
Repair Notes:

The technician inspected the vehicle and verified excessive water entering the truck bed, with the tonneau cover not operating as expected.

The cause was inadequate sealing on the upper tonneau applique. The technician applied sealing foam to the applique and tested to confirm that water ingress had been resolved. The repair was validated with no further leaks detected.

Correction: Test To Confirm Water Ingress No Longer Present

Correction Diagnosis: Water Ingress/Leak - Interior

Correction Applique - Upper - Tonneau (Long Range) - Remove and Install.”

Given that many Cybertruck owners are facing tonneau water ingress issues, it’s good to see Tesla addressing the problem by simply applying a foam sealant to the upper tonneau applique.

What is even better is that we can see on the service note that Tesla performed this repair for free under the basic vehicle warranty.

Additionally, the service note also shows the minimum work and parts needed to stop the water leak.

Tesla service writes…

“Parts Replaced or Added

Part

SEALING FOAM(1098720-00-B)

Quantity

2.00”

This is wonderful news; however, looking at the comments, fellow Cybertruck owners continue to voice their frustration with Tesla.





https://www.torquenews.com/11826/te...on-tonneau-cover-water-leak-problem-foam-seal

Depends on your service center, I took my truck to a service center 3x and zero change, took it to a different one and it was fixed first time.

 

[Dahongfei]

They just did the foam to mine last week.

last year they did the extra slat and it didn’t work, but the foam has finally done it. I don’t even get drops in it anymore

 

[sharpgator]

They just did the foam to mine last week.

last year they did the extra slat and it didn’t work, but the foam has finally done it. I don’t even get drops in it anymore

Are you able to post a picture of this foam or describe it? Thx

 

[jf64k]

Part # from link: Sealing Foam 1098720-00-B

Costs $3.50

https://parts.tesla.com/en-US/catal...eference=b685e77a-0f90-4a81-a1a5-3f3417542754

 

[SabrToothSqrl]

 

[Gigahorse]

They just did the foam to mine last week.

last year they did the extra slat and it didn’t work, but the foam has finally done it. I don’t even get drops in it anymore

You tried a carwash yet? have heard the foam helps with light rain but carwash still gets it wet

 

[Dahongfei]

You tried a carwash yet? have heard the foam helps with light rain but carwash still gets it wet

I foam cannon and hand wash all my vehicles so I can’t attest to the automatics.

But I did some testing with garden hose and my pressure washer and not even a drop got through that appliqué, where prior, it would constantly drip into bed over the rear window there. It worked

 

[Dahongfei]

Are you able to post a picture of this foam or describe it? Thx

I didn’t see it or take it apart after service. I just know it works and it feels great!

 

[resellpanda88]

Got mine done a few months ago. Had a 2024 model I took in there 3 times to address it and they said no. I gave up. Within spec. Never advertised as waterproof etc.

Took my 2025 in and just casually asked about it. One tech heard me and said wait, there's a new bulletin for that now. I'll take a look.

Addressed big difference. It still leaks but at high speeds while raining. I don't think I can avoid that but parked it seems waterproof.

 

[jf64k]

Got mine done a few months ago. Had a 2024 model I took in there 3 times to address it and they said no. I gave up. Within spec. Bever advertised as waterproof etc.

Took my 2025 in and just casually asked about it. One tech heard me and said wait, there's a new bulletin for that now. I'll take a look.

Addressed big difference. It still leaks but at high speeds while raining. I don't think I can avoid that but parked it seems waterproof.

Thanks for sharing. I have a FS AWD 13xxx and had the tonneau slat added. Still got some water intrusion. Was told essentially the same thing…‘not water proof’.

My CT is on Day 2 at the SC to fix connectivity and frunk issues. I just messaged them to see if they can add this concern and possible fix while my CT is there.

 

[resellpanda88]

Thanks for sharing. I have a FS AWD 13xxx and had the tonneau slat added. Still got some water intrusion. Was told essentially the same thing…‘not water proof’.

My CT is on Day 2 at the SC to fix connectivity and frunk issues. I just messaged them to see if they can add this concern and possible fix while my CT is there.

Good luck. It's not coming from the slats/tonneau. It's the plastic trim piece from the glass roof to the plastic piece that's leaking.

 

[James Cole]

Guys, do you know how this "foam" is installed?

 

[Dahongfei]

Guys, do you know how this "foam" is installed?

No clue, but it works.

Tech also noted on mine that he “adjusted height of my appliqué.” It sat a bit higher to roof glass after service

 

[HaulingAss]

Guys, do you know how this "foam" is installed?

Yes, it's self-stick foam, like weatherstripping. The only thing special about it is it collapses very easily under pressure which means it wont cause the tonneau trim to bulge up in the center.

AFAIK this is the same foam strip that was applied at the factory from 2023 on (but wasn't always applied correctly). I took delivery of my Cybertruck in April of 2024 and it had twin waterfalls into the middle third of the bed (right under the tonneau trim piece). I removed it and noticed there were two gaps in the foam strip right where the waterfalls were. I pinched off some excess from either end (of the existing foam strip) and applied it to the two gaps and then re-installed the tonneau trim. Hasn't leaked since. It took 15-20 minutes.

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