I've never had a problem with my SilverStars, except that the ayer the most unreliable, least-lasting bulbs I have ever had in a car. I still don'r really understand the "yellow foglamp" part, I don't see how they can be so much better. My 6000 has both yellow foglamps, and regular white-light, under-bumper foglamps (yes, it did come from the factory that way) and I never use the yellow ones, I think they look a little strange. I should try them sometime when it rains/snows to see how much better they are. I should buy some more SilverStars, too, see if they actually last longer than two weeks...