I realized I got the D4C bulbs in the mail, instead of the D4R for my 2007. Recently installed the bulb and it didn't work. I thought these were the same bulbs I bought last time my driver's side went out, but maybe I'm wrong about that. I hope this is the reason it's not working! That would be such a sweet deal to just have to buy the correct bulbs. I'm getting to be a freakin' expert on changing these things.
D4C should work as it is universal for the D4? bulb series. But certain cars do not work well with cheap aftermarket bulb. If you buy a quality bulb, it should be fine.