Xenon HID Ballast..buzzing noise

I have HIDs on my '01. Check to make sure the lead between the ballast and the bulb hasn't chafed through. If it's fine, you're probably out of luck- those things aren't repairible.
Careful around the ballast when the lights are on- it and the lead to the bulb contain high voltage!

it might also be one of your HID bulbs thats burnt out, but check the leads like the other guy said, if the problem is the bulb and you want to replace it they have some on americanmuscle.com for about 50-60 bucks each.

The thing is,HID bulbs shouldn't burn out like that.They should last several years over a halogen bulb.

I would just look on e-bay for one.They have reputable sellers with "buy it now" prices for way cheaper.Normally I wouldn't say ebay,but for these bulbs,it's worth a look.What was the brand name of the HID kit you got? Was it one of those cheap knock off kits? Are you using projector lenses or just mounting those kits that allow you to use your stock headight housings? Personally I don't like those because on some cars,it causes bright light to get scattered all over the place including your eyes.