hey guys i have a is350 07 and my headlight randomly goes out but it comes back on when i turn the switch, im out of warranty called lexus corp today and told them this is common problem and i is not acceptable with such a car, so they told me to take the car to the dealer tomorrow and get a written estimate and fax it to them, from what it looks like they will be covering me, ill keep you guys updated

 

its the bulb the light is an hid which is run by gas. when u turn it on it lets out just enough gas to spark up but doesnt turn on. i had the same problem. order yourself a new pair of d4s hid bulbs. should run you no more than 75 dollars as long as you dont get them at the dealership for 200 each

 

Or also a ballast problem (more expensive for dealer as they are built in to the headlight)

 

The same exact thing happened to me last month and it was the bulbs so hopefully the dealer will pick up the tab. I wasn't that lucky.

 

well i think Lexus is picking up the tab for me because when i was in warranty i took my car there twice because of this issue but they always told me they couldn't duplicate the problem

 

Most likely just need new bulbs. I had this exact same issue with my '06, replaced the bulbs (D4S, think I paid around $70 a piece) and haven't had a problem since. Hopefully the dealer takes care of it for you.

 

that's great,atleast you don't have to worry about spending more money...

 

Same thing happened to my 07 and it was the bulb, unfortunate part is the bulbs from being older will be a different color if you replace one. Take this opportunity to buy upgraded 6000k HID bulbs or if the dealer is replacing one make sure they replace both so they match.