How can you get to the brake light on a 2001 Nissan Xterra to change the bulb?

Answer 1

If you can see no external screws then you access it from the backside. There may be a panel you must remove first.

There are 2 screws on the hatch side, remove them and on the "outside" or body side of the lamp there are 2 studs on the back of the lamp that push into female clips in the body, so you should just be able to gently pry the lense assembly out. I use two screwdrivers. They snap loudly when they come out and also snap loudly when you are putting it back on. Make sure you push hard enough to hear the snap.