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Moisture/condensation in headlights

Discussion in 'Model S' started by Lerxt, Dec 17, 2014.

  1. Lerxt

    Lerxt Member

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    I have noticed condensation in my headlights, just at the bottom of the light on the glass. When I took it into the service center I was told its ok to have some moisture however I'm not convinced. Has anyone dealt with this problem before?
     
  2. skboston

    skboston Member

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    That's a weird response from the SC, moisture inside the headlights is unacceptable and you should speak with them again, I'm yet to see a headlight on any car that's leaking water.

    Few weeks ago when I noticed my rear lights with water inside, SC replaced them immediately with no questions asked, you should expect the same.
     
  3. slcuervo

    slcuervo Member

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    I had the same issue with the rear lights and the SC replaced the seals. However, it has not fixed the issue - it has improved it a lot, but I can see now and them some moisture (like a foggy layer) inside.

    And now that you mention it, I've also seen it in the headlights, but so light that I wasn't worried.

    Now you've just make me add this to the list of things to be looked at next time I take the car to a SC...
     
  4. mknox

    mknox Well-Known Member

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    For the past two winters, when it gets really cold, both my headlights will fill about 50% full of fog/condensation. So far, it hasn't been in front of the projector lens. Here's a picture with it partially fogged over:

    IMG_1588.JPG
     
  5. AmpedRealtor

    AmpedRealtor Active Member

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    Any condensation in the headlight should be unacceptable because it reduces the light output and changes the beam focus. Those headlights need to be replaced, but fortunately it's a simple part swap. Tesla will change out the entire headlight assembly with a new one.

    - - - Updated - - -

    I had a recurring issue here in Arizona that required the creation of a new service bulletin. My particular issue was the service center's inability to properly resolve moisture and dust intrusion into my rear backup tail lights (the bright white ones). The appliqué was replaced four times, each time the problem shifts from one side to the other. This last time they engaged engineering who offered a different solution that resulted in a service bulletin. If you are unable to have your rear lights properly fixed, ask your SC to contact the Scottsdale SC for how they resolved my issue. Since the last fix I have not had any more issues. They either used a different seal or a different adhesive.
     
  6. mknox

    mknox Well-Known Member

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    In my case, it happens in both headlights but only when very, very cold. So far, it has not covered the portion of the lens that the beam shines through. No noticeable change in light output or pattern while driving either. I have not mentioned it to Service because it happens so infrequently.

    The last time I was in for that, they mentioned that they had a revised procedure for the fix. I guess word has made it to Toronto!
     
  7. Lerxt

    Lerxt Member

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    I took my issue further and they have now decided to replace the headlights. It can't be acceptable to have moisture in the light. Once I moved up the chain of command there was decisive action.
     
  8. skilly

    skilly Member

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    moisture is different from water. Sitting water shouldnt be happening; however a small amount of condensation due to temperature changes is normal - there is actually a rubber hose on the back of modern light housings because of this. It helps reduce/eliminate that phenomenon. The lighting heats and cools trapped air to a different temp than is outside of the lens (think of fogging a mirror).
     
  9. auger

    auger Member

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    I notice my left headlight fogs up a little bit when I wash the car. It clears up quickly. I told the service rep about it when I took my car in for its first service.

    He said it was normal. Of course, I said, "OK, the right headlight doesn't fog up when I wash the car." :rolleyes:

    It wasn't a big deal to me so I didn't press it.
     
  10. http.com

    http.com Member

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    Had this same problem with condensation in the rear brake lights and to some extent the front headlamps......on my 2012 Mazda MX5 (miata), which I've since sold. It can happen with any vehicle, and I'm sure it's a simple fix, or at least seems it should be.
     
  11. mknox

    mknox Well-Known Member

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    Noticed both of my tail lights (the part not on the trunk lid) very fogged over when I came out of the car wash the other day. Temps were just above freezing and I only noticed it because I got out of the car at a coffee shop nearby. By the time I was home they had cleared out.
     
  12. FrederikC

    FrederikC Teslafied.eu

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    2015-01-23 07.24.47.jpg 2015-01-23 07.25.04.jpg

    Tesla is denying to do anything about my headlights, what do you think should they fix it or?
     
  13. scottm

    scottm Active Member

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    Headlights are vented to atmospheric... delta temperatures and difference of humidity levels (car wash)... expect fogging.

    I've noticed it a bit in days following a car wash.

    I think the projector beams give off enough heat that they clear the fog in that spot on the headlights first.

    I've also noticed fogging of the reverse lights...

    This all clears up in a couple days when humidity balances out again.
     

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