You need a screwdriver or bit with a torx end; T-20 I believe. Remove the screw from the cover and twist the cover counter-clockwise. Twist the bulb's socket, counter clockwise as well you will see the fastener that holds the bulb. Push the fastener in, bring to the side and release. Replace the bulb. Do not touch any part of the bulb's glass, the bulb is fastened in one position only AND make sure the car is completely off before you start; 30,000 volts is a lot of current.