Online and brick & mortar auto parts stores. As long as you have make, model and year of vehicle, you'll be good to go. Of course, you can go to the dealer too.
how to change a brake light on 2002 Nissan altima
Check brake light switch - could be defective or not aligned properly
low brake fluid
Get down on the floor board and look up at the brake pedal arm. You will see a switch that the arm hits when no pressure is applied to the brake. Twist the switch and adjust so when you barely touch the pedal the brake lights come on.
According to the owners manual for Nissan Altima 2007 it is DOT 3.
Try to have your Neutral Safety switch checked out or your brake switch, It controls the shifter so you cant put it in gear without pressing the brake
Check the brake light sending switch. It's usually attached to the brake pedal. If that's not it, check the turn signal switch inside the steering column.
Most likely not as those 2 models are total different generations.
Get down on the floor board and look up at the brake pedal arm. You will see a switch that the arm hits when no pressure is applied to the brake. Twist the switch and pull out of bracket and then remove wires. Do reverse when installing new switch adjust so when you barely touch the pedal the brake lights come on.
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.