Welcome to Tesla Motors Club
Discuss Tesla's Model S, Model 3, Model X, Model Y, Cybertruck, Roadster and More.
Register

What is the fix so stop moisture from entering taillights?

AWIZRD

Supporting Member
Supporting Member
Sep 9, 2018
4
0
Gilbert, AZ
Hello all,
My right rear taillight is notorious for showing moisture inside the taillight after a good rain. I have contemplated removing the assembly and giving it a good dose of silicone, but thought I would throw the question to the group. Sorry, no warranty here still looking at picking that up since I just bought the car - 2014 P85D
Thanks
 

TEG

Teslafanatic
Aug 20, 2006
21,902
9,016
Bump.... But in my case Model 3 tail light:

fog1.jpg
 

JoeMartin

Member
Nov 27, 2018
147
89
Pensacola, FL
Having not dealt with warranty/service centers/anything-yet-because-my-leg-is-being-pulled-by-my-sales-adviser, I can tell you that it is a rather easy fix for most cars.
Now, I'll admit my knowledge is minimal regarding Tesla parts, but I recall my brother saying the clear lens was gently held on with some sealant (assuming silicone) when he broke his tail light and needed just a replacement cover (which is not available).

Use this information at your own risk, I am not responsible for any damages that may occur from attempting to separate your lights.

If that's the case, you could remove the tail light, gently bake it in an oven to loosen the adhesive.
I typically do 200-220 degrees Fahrenheit and check it every 10 minutes.
I remove all of the racks except for one and put it on the very bottom, and set the light on a piece of plywood (make sure it's clean, otherwise the wood can smoke) and place the tail light on there, making sure it's not touching any part of the stove.

After 10 minutes I remove it with gloves (I use just basic mechanics gloves, but you may need something thicker depending on your heat tolerance) and use nylon spreaders ($5 at harbor freight, they're yellow) and see if the light will separate. If it does, continue until the glue cools down and re-bake as necessary.

After you have it apart, you can either add more silicone, if that's what there, or use a butyl glue, which is what I typically do.
I use some from Morimoto, as they're my go-to for anything light-project wise.
Morimoto RetroRubber Butyl Glue - Custom Headlight Build Materials From Morimoto
 

JoeMartin

Member
Nov 27, 2018
147
89
Pensacola, FL
Also, I was looking up some information regarding Tesla tail lights having condensation issues, and it seems it's rather rampant and a pretty big issue.

If I ever manage to get my MS I'll see if it has the issue and see if I can isolate what is causing the issue, if so I'll post a, hopefully, permanent fix.

Some of the posts that I've read seem to believe it's part of the appliqué causing issues, but I don't see how that would... But then again, limited knowledge currently.
 

TEG

Teslafanatic
Aug 20, 2006
21,902
9,016
That is most certainly covered under warranty. Email that photo to your service advisor, have them order the part for you and they will probably send a ranger out to replace it. That is NOT ok!

I have an appointment to have it replaced now.
 
  • Like
Reactions: Muzzman1

KidDoc

Member
Aug 6, 2014
348
431
College Station, TX
There is nothing wrong with the design BUT the foam sealing gasket is applied incorrectly.
Take a Look here on how I fixed it:

Tail Light

You may not know the answer but do you think just taking them off and resealing that gasket will fix the leak? I know you purchased a new unit due to the LED Light being dead but I believe all of mine still work so I'm considering just taking it apart and flushing out the bugs/water and resealing it one weekend.

But I would hate to have it all taken apart then figure out I need to order a new tail lamp!
 

ASMills85

Member
Sep 8, 2018
240
104
NE
You may not know the answer but do you think just taking them off and resealing that gasket will fix the leak? I know you purchased a new unit due to the LED Light being dead but I believe all of mine still work so I'm considering just taking it apart and flushing out the bugs/water and resealing it one weekend.

But I would hate to have it all taken apart then figure out I need to order a new tail lamp!
As long as you can get the moisture out and ensure the seal is still good there should be no reason that wouldn’t work.
 

docrice

Member
Jun 21, 2014
176
69
Bay Area, CA
Thanks for posting the link to the teslazoom.com write-up. I had one of my tail lights replaced under warranty for this issue and the other has been experiencing this as well for over a year now ... and I'm way out of warranty.
 

Products we're discussing on TMC...

About Us

Formed in 2006, Tesla Motors Club (TMC) was the first independent online Tesla community. Today it remains the largest and most dynamic community of Tesla enthusiasts. Learn more.

Do you value your experience at TMC? Consider becoming a Supporting Member of Tesla Motors Club. As a thank you for your contribution, you'll get nearly no ads in the Community and Groups sections. Additional perks are available depending on the level of contribution. Please visit the Account Upgrades page for more details.


SUPPORT TMC
Top