It just slides into place on the shelf. Simply pull it back and twist it a little and it will come free. I read this in the owner's manual if you have one handy.
smash it in wi a hammer
how to change a brake light on 2002 Nissan altima
low brake fluid
Remove the brake calipers and lightly tap the rotor with a rubber hammer. They should free up easily.
According to the owners manual for Nissan Altima 2007 it is DOT 3.
Most likely not as those 2 models are total different generations.
brake light and battery light is on
how to change the brakes
The Nissan Altima has an opaque cylinder that holds the brake fluid. Looking on the side of the cylinder, check the high and low marks and make sure that the fluid is between the two.
Any DOT 3 Brake fluid
http://www.paulstravelpictures.com/Nissan-Altima-Rear-Brake-Light-Bulb-Replacement-Guide/Nissan-Altima-Tail-Light-Bulb-Replacement-Guide-011.html here you can see every step to that question.. I just did it.. and works :) by Paulo Fernando!!
Press the pedal in again