Walk outside, point your fob at the car, and press unlock. If the doors chirp, you’ve officially fixed something with your own two hands. Congratulations—you’re now a certified Nissan fob whisperer. Do a little dance if you want. I usually do. My neighbors think I’m a weird person who loves chickens, but I don’t care.
And if the car still doesn’t respond? Check that you put the battery in the right way, or try a different brand of battery—sometimes they’re duds straight from the pack. It happens. Don’t blame yourself; blame the battery gods who like to test us.