Troubleshooting '03 E53 Xenon

[labatt]

So... passenger side low beam is out. High beam works, turn signal works, but the low beam is out. I'm ASSUMING this means the bulb is blown? Could it be the ballast or something else? If it could be something else, how do I best troubleshoot?

If it's pretty definite that it's the bulb, do I follow these instructions to remove the unit?

http://www.xoutpost.com/articles/x5/...placement.html

These instructions to access the bulb:

http://www.xoutpost.com/articles/x5/...non-bulbs.html

And then buy something like this?

Philips D2S HID Xenon Bulb BMW E46 E39 M3 M5 x5 New | eBay

Or any better suggestions on the process and bulb?