At 45K miles, my passenger headlight (HID on 2007 Prius) is on sometimes and off other times. The dealer tells me this is the beginning of the bulb going and it needs to be replaced at $400+ (I actually forgot how much they said - didn't want to hear it). I've been reading on the forums and realize I can get the bulbs cheaper online, but am unclear whether the installation involves removing the front bumper (which is what the dealer told me, and I may or may not want to attempt myself) or not (which is consistent with the owners manual). Seems like I have heard both being stated in the threads I have read. Can someone clarify please. Does the bumper need to be removed to replace the HID headlight? Thanks . . .