1. Open the trunk of your vehicle.
2. Locate the third brake light assembly, which is mounted in the center of the rear window.
3. Turn the plastic cover counterclockwise to remove it from the assembly.
4. Remove the old light bulb from the socket by turning it counterclockwise.
5. Insert the new light bulb into the socket and turn it clockwise to secure it.
6. Replace the plastic cover and turn it clockwise to secure it.
7. Test the brake lights to ensure the new light bulb is working properly.