My '04 Prius drivers side headlight is intermittant. I've read that this is caused by the headlight going bad in most cases. I pulled the bulb and found it to be a OSRAM Xenarc D2R. Is this the OEM bulb? I have been very satisfied with the bright white light and got many comments from passengers. Where do you recommend buying a replacement and is there a better brand to get? Thanks for your help. I did search for this but could not locate the exact answer I was looking for.