This one's easy, pop open the rear hatch to gain access to the 3rd brake light. If your struts don't hold the hatch open, you may want to replace those at the same time.

The plastic trim around the tail light is held in with 5 metal clips, 2 on each side and 1 in the middle.

Simply pull outward on the panel by prying the panel out, away from the car with your fingers. As with most clips like these, they require a good amount of even, carful pressure before they pop out.

Now remove the red plastic defuser by carefully unclipping it at either end and setting it aside.

Usually the bulb in question will be discolored or if you look closely, you'll be able to see a break in the filament. These bulbs pull straight out of the housing. Just pull out the offending bulb or bulbs

Remove the new bulbs from the package and insert them into the bulb sockets.

Now's the best time to test the new bulbs to see if they are working. Have a helper press on the brake pedal while you watch for the bulbs to light up.

If for some reason they don't light, then you'll have to investigate further into other possible causes like the bulb's socket wiring, or brake switch.

This just snaps back in the way it came off. Remember there's one (probably fragile) clip on each end that snaps into place. It'll only go on one way.

Line up the trim panel clips and press them back in place. They'll snap tight once they are attached.