This is an easy repair that almost anyone can tackle without a mechanic - and you will save some money in the process.
Open the hood and disconnect the connector from the back of the headlight assembly by pulling straight out.
Remove the round rubber weather seal by pulling on one of the tabs.
Unclip the end of the metal hold-down wire (spring clip) and pivot it away from the bulb. This step can be a little tricky because you literally cannot see what you are doing and have to rely your sense of feel - Use a flashlight to get a good look at the hold-down wire before you complete this step.
Pull the bulb straight out of the headlight assembly.
Install the new bulb in the reverse order of removal. Make sure the rubber weather seal is firmly and completely seated around the entire circumference.