Has anyone had any luck with a diagnoses of this problem? My 06 IS250 is experiencing the same issues. One headlight will go out after several minutes of driving. The next time I start the car, both headlights will work again. The problem seems to alternate between both headlights. Last weekend, both headlights went out!!! The next day....both were back on. My dealer told me I probably needed new headlights since there computers couldn't find a problem. I was skeptical then and am even more so after reading this forum.
