Happened to me once yesterday, and again this morning. During the drive, 1 bulb would just turn itself off.
If i turn the lights off, then on again, it stays off.
I don't know much about HID, is this a normal thing for them to do before they die, or do they just die?
I haven't noticed any flickering, or anything of sorts.
Haven't really checked anything so far as the weather is not really hospitable, so i'm just gathering info so far.
bulbs were never changed, or anything done to the light in the 4 years i have owned the car.