Beware of the cheaply priced HID bulbs made in Asia. I bought a pair for about $40 about six months ago, and I already have to replace one of the bulbs because it flickers on and off. I would stick with the big three well-known HID bulb companies for now on. GE, Osram, and Sylvannia. The bulb change is usually pretty simple. Unscrew cap, remove igniter from back of bulb, and unclip bulb from housing. Reverse to install. However, you may have to remove the intake or coolant bottle to have enough room to work.