Shyguy122

I have a Lexus IS 2007 250 AWD.

For some reason my left headlight turns on when I have the headlights on auto. But if I toggle it on then the right one goes on. I'm planning to replace the bulbs but I figured I should ask before I replace something I don't need to.

Any information would be great. Thanks

Bichon

Swap the bulbs between the left and right side. If the problem changes sides, it's the bulb. If the problem stays on the same side, it's likely the ballast. Most of the time it's the bulb, especially if you are still on your original pair.