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      08-17-2015, 04:15 PM   #1
schwin
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Headlight Condensation After Xenon Control Module Units Replaced

Both xenon control modules recently went out in a flash flood. Luckily insurance is covered it through comprehensive when the BMW dealer mentioned there was water in both units when removed. I picked it up today after a week in the shop and there is condensation after it rained. Please see below. Should I be concerned?
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      08-17-2015, 05:21 PM   #2
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Quote:
Originally Posted by schwin View Post
Both xenon control modules recently went out in a flash flood. Luckily insurance is covered it through comprehensive when the BMW dealer mentioned there was water in both units when removed. I picked it up today after a week in the shop and there is condensation after it rained. Please see below. Should I be concerned?
Very similar thing happened to my 335 with adaptive xenons.

Once of my bulbs had gone out, took it to an indy shop who swapped it but apparently didn't seal the lights correctly so next time it rained it condensed like a mofo and warning came up on my idrive. I took it back to them and they replaced the ballast on the affected headlight which fixed the issue.
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      08-17-2015, 06:48 PM   #3
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thanks for the reply. The condensation went away after an hour, I'm concerned that it will burn out the bulbs quicker with this issue.
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      08-17-2015, 08:07 PM   #4
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Once condensation is present you know it will happen again. Bring it back to the dealer.
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      08-18-2015, 04:46 PM   #5
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Here's the formal response from the BMW dealer:

"It is normal, especially when the seasons are changing or when there is inclimate weather, for condensation to build up inside of the headlights. As soon as you turn on the headlights heat begins to build up and the condensation should evaporate within 10-15 minutes of the headlight being on. The technician resealed the assembly so what you're experiencing is most likely normal given the recent weather and humidity.

Let me know if the condensation persists even after the headlights have been on for longer than 15 mins."
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      08-18-2015, 04:51 PM   #6
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Quote:
Originally Posted by schwin View Post
Here's the formal response from the BMW dealer:

"It is normal, especially when the seasons are changing or when there is inclimate weather, for condensation to build up inside of the headlights. As soon as you turn on the headlights heat begins to build up and the condensation should evaporate within 10-15 minutes of the headlight being on. The technician resealed the assembly so what you're experiencing is most likely normal given the recent weather and humidity.

Let me know if the condensation persists even after the headlights have been on for longer than 15 mins."
What a B.S. response, this is without even looking at the car? WOW!
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      08-18-2015, 11:11 PM   #7
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Take the top cover off on a warm day with no rain, it should take away th remaining condensation.
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      08-19-2015, 08:45 PM   #8
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Will do, giving it a few days.
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      08-20-2015, 02:38 PM   #9
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Had the same condensation issue in my M3. Talked to a rep and he told me the same BS response that it's normal for condensation to occur. After a couple months it was really bothering me again so started working with a new rep who was much more helpful than the previous. Good friends now. Took the car in, ran some tests and they decided to replace both headlights under warranty. No condensation since then! So yes. They can replace/fix the headlights under warranty if they want to.
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      08-20-2015, 02:55 PM   #10
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Quote:
Originally Posted by schwin View Post
Here's the formal response from the BMW dealer:

"It is normal, especially when the seasons are changing or when there is inclimate weather, for condensation to build up inside of the headlights. As soon as you turn on the headlights heat begins to build up and the condensation should evaporate within 10-15 minutes of the headlight being on. The technician resealed the assembly so what you're experiencing is most likely normal given the recent weather and humidity.

Let me know if the condensation persists even after the headlights have been on for longer than 15 mins."
Wowwwww save that Email from the tech! If this becomes more of an issue that will be some serious firepower if you wanted to strong-arm them into replacing them. I'd ask for them to ship you an entire new set and ask to keep the old ones as "backups". And then do a headlight mod, reseal and sell
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      08-20-2015, 02:57 PM   #11
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Put some silica packets in to your head lamps temporarily to dry them out.

There is probably some left over moisture trapped inside from when they replaced the modules.
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      08-20-2015, 06:42 PM   #12
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Thanks all for your help! I'll definitely save it and watch it day to day. The BMW dealer says they give a two year warranty on their work.
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      08-23-2015, 12:08 AM   #13
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It is normal for some condensation to develop inside the headlight assembly; they are not completely sealed! There are two vents with rubber boots that should prevent water from entering the housing, but humidity will enter. If you get a kind of foggy look, that is normal; if you get puddles of water, you may have a bad seal.
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      08-23-2015, 01:26 PM   #14
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Quote:
Originally Posted by MineralWeiss View Post
It is normal for some condensation to develop inside the headlight assembly; they are not completely sealed! There are two vents with rubber boots that should prevent water from entering the housing, but humidity will enter. If you get a kind of foggy look, that is normal; if you get puddles of water, you may have a bad seal.
Thank you sir! I did notice that when looking at the housing that holds the bulb. That makes much more sense now.
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