They aren't terrible, but somewhat yellowed. Is there a treatment that works? Of is replacement the best idea? (Or maybe better yet - just ignore the issue - the lights work. They just look less Lexussy than I'd like.
I would try to treat them first with a polish and sealant kit. If that doesn't help, or if it eventually yellows again, then I would go ahead and replace them.
I wouldn't ignore the issue...it affects visibility at night.
Other methods:
South Main Auto:
Eric The Car Guy:
See below: you will get answers on both sides
https://carkiller.com/scottykilmer/qa/plastic-headlights-mequiar-or-plexus/#post-49785
https://carkiller.com/scottykilmer/qa/plexus-plastic-cleaner/#post-60125
OK. The concensus is to try treating them first. Watching a variety of videos, I'm going to try with the 3M kit, some masking tape and my drill. Then coat with Plastix.
It’ll just get yellow/cloudy again after a few months. It’s not a fix, just a stop gap.
Just buy aftermarket assemblies, if you want a permanent fix (until those turn yellow after 10yrs..)
Now, if you want to pinch pennies & you’re feeling adventurous, buy just the clear plastic lenses and glue them on to the headlamp housing, after separating the old oxidised lens.
The easiest & surest way is to buy new, aftermarket assemblies.
Alternatively -