I recently did a bumper change, not sure if because of this(shouldn't,headlights are never touched, disassembled, nor unplugged), condensation of moisture is occurring inside both of headlights.

How can i fix this?

Cold weather snap and high humidity can cause this. I suggest driving with your headlights on for a few hours - the heat should clear up the fog.

Is there any way to re-seal from the headlight housings?

thanks

I'm not sure what you are asking - the OP was that the headlight assemblies were never touched. They are actually not TOTALLY sealed. (a'la hermetically) because heat builds up in the assemblies they are vented. So in most cases any accumulated humidity dissipates normally. Excess moisture (say from water entering the headlights from a hose or something like that is a real problem. That's why it's not a good idea to use a hose or power washer under hood without covering the electronics with plastic / foil to protect them.

If you find excessive moisture is building up check the bulb mounting assemblies to be sure the rubber o-rings and gaskets are securely fitted etc. You could use a heat gun (CAREFULLY) or hair drier to warm the assemblies and dissipate the moisture. REMEMBER, it's plastic - too much heat will distort and damage the parts.

If it's a fog probably is just condensation..
if it is water then it might be a crack somewhere..

My solution for fogginheadlamp is to drive for an hour or so, get home, open the bonet,
open the rear headlamp cap, close the bonet and leave it for the night,
by morning the fog should be gone...
dont forget to put back on the rear cap.

My car is an MY2008 E60 and i have the same issue: fog in headlights (in both of them).
I removed the headlights and do not see any cracks, the car itself it's in best condition, no accidents in the past. So... this problem on E60 is a normal or not?
When I bought the car, i noticed some marks on the inside of the glass. It seems that there have been moisture in the past too.

What do you recommend? In no case will replace them.
How can I find the cause? I have any chance to clean the the inside of the glass?

Wouldn't that make them foglights?? :whistle:

:lol: I prefer them without fog.

You guys are too foggin funny :dance:

I don't know about you guys but in the past when this happen to me I just opened the back cover (and any other covers) and stuck a hair dryer on low in there. many times less than 15 mins later, it's gone.