Hi,

 

in past week I have looked 3 Karoqs RS, all 2020 year and all with LED adaptive lights. And with all of them I noticed headlights are not crystal clear anymore, but a bit yellow and foggy, especially in corners.

Is this some known issue? I guess even if it was, it is too late now for warranty claim, right?

It is a known issue, a few owners have had them replaced under warranty. Strangely one of mine is also suffering, it’s like a very thin layer of dust inside the lens.

 

It looks very similar to the fallout from the plastic dashboard materials that can contaminate the inside of the windscreen.

11 hours ago, silver1011 said:

It is a known issue, a few owners have had them replaced under warranty. Strangely one of mine is also suffering, it’s like a very thin layer of dust inside the lens.

 

It looks very similar to the fallout from the plastic dashboard materials that can contaminate the inside of the windscreen.

I read somewhere LED headlights have a small fan inside to vent out moisture, as LEDs aren't so hot as incandescent or HID lamps. But this issue is more like discolouration, not just moisture. And probably after 4 years out of warranty.

1 hour ago, Labsy said:

I read somewhere LED headlights have a small fan inside to vent out moisture, as LEDs aren't so hot as incandescent or HID lamps.

 

You read wrong, it is a cooling fan, the semi-conductors run 'kin hot and would only last a couple of minutes without the cooling fans.

21 minutes ago, J.R. said:

 

You read wrong, it is a cooling fan, the semi-conductors run 'kin hot and would only last a couple of minutes without the cooling fans.

Kinda logical. So I guess those fans cannot expell moisture, but only dissipate heat, probably through some heat piping or something like that.
Meaning, those discolouration and fogginess in LED headlights is not a consequence of poor ventilation, but rather poor quality of clear plastics?

I have no idea whatsoever, air circulation is excellent for getting rid of moisture but only if provision is made for the entry and exit of air, the heat generated from LED lights is surely less than from an incandescent bulb but more than enough to fry the semi-conductors without cooling.

On 22/03/2024 at 10:16, J.R. said:

I have no idea whatsoever, air circulation is excellent for getting rid of moisture but only if provision is made for the entry and exit of air, the heat generated from LED lights is surely less than from an incandescent bulb but more than enough to fry the semi-conductors without cooling.

A bit of a daft question, maybe, but I’m not sure ifLED headlamps generate enough heat to melt snow whilst driving?