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Discussion Starter · #1 ·
I have a well maintained 98 Passat and have noticed that the headlight covers are discoloring --the driver's more than the passenger side. The discoloration gives the cover an opaque appearance but I fear that this will progress to yellow. To may knowledge the light covers are not taking in moisture.
Does anyone know the cause of this? More importantly, is there a remedy?
Thanks for any help.
 

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Re: Headlight cover discoloration (BJH)

No real solution so far. I've tried using chrome polish with my high speed buffer (read this info on other forums) and it really didn't help that much. Plastic polish is not aggressive enough to fix it.
I've noticed this problem on several 98's. It's just an age related problem. The plastic is breaking down because of UV light. I'm looking into getting new glass versions from a friend in Germany as a last resort. Oh and yes, my drivers side is much worse than the passenger side as well.
 

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Re: Headlight cover discoloration (Vedubauman)

Try finding some cerium oxide (know any amatuer tlescope makers?) and polish with a chamois. There may be a mechanical buffer that will work, but you don't want to develop much heat...besides it's good aerobic execise. After you get the plastic as clear as you can, coat with a bit of water based varnish. I removed the headlamps so the majority of the surface could be fairly flat. This "sort of" worked for my B4. Then I replaced with Eurocodes, that really cured the problem.
Rodg
 

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i'm having the same problem on my 98 passat. i think im gonna start looking to find replacements, as it is kind of ugly compared to the rest of the car
 

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Re: (wtmcgee)

theres nothing you can do about it. its a common problem with ALL plastic lens headlights as they age, and are exposed to UV rays, as well as the heat from the headlamp itself. my friend had a ford escort that did the same thing..friend has a volvo 240 thats doing the same thing..and so on and so forth..
how to prevent it? dont ever park your car outside or use your headlights.
or more realistically, buy a pair of glass e-code european headlights.
chris
 

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Re: Headlight cover discoloration (BJH)

I had the same problem i thought the car was in a wreck.
I used clear prolyurethne. It took most of the discoloration out, but of course not all. I do not know the long term effects but it looks better for now.
joe
 

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Re: Headlight cover discoloration (BJH)

It is suggested to use high quality bulbs instead of cheap ones that emit a great deal of UV.
 
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