You can reach it from the wheel well. Turn tires to access, remove a few screws, enough to get your hand in and reach in. There is a black plastic cap which loosens with a quarter turn to left. The cap seals moisture out so make sure the gasket is intact and sealed when you put it back. To remove lamp, the bulb turns with a quarter turn to left also. Make sure you don't break the electrical connector when you remove it and don't touch the glass on the new lamp with your fingers, but then you already knew this.