You can replace a Nissan key fob battery yourself in about five minutes
Most Nissan key fobs use a coin-cell battery—usually a CR2032 or CR2025—that you can buy at any drugstore or supermarket for two to five dollars. The battery typically lasts three to four years before the fob stops locking or unlocking your doors reliably. You do not need tools or a dealer visit; you just need to open the fob, swap the old battery for a new one, and snap it back together.
The exact steps depend slightly on which Nissan model you own, because fob designs changed over the years. The process is the same idea for all of them: find the seam, pry gently, remove the battery, and replace it. This guide covers the most common Nissan fob designs from the last 15 years.
Key Takeaways
- Nissan key fobs almost always use a CR2032 or CR2025 coin-cell battery that costs two to five dollars at any pharmacy or grocery store.
- Most fobs open by sliding a small metal tab or prying along the seam between the two plastic halves with a coin or flat tool.
- The battery sits in a metal holder and slides out sideways; note which side faces up before you remove it so you can install the new one the same way.
- After you close the fob, test the lock and unlock buttons on all four doors before you drive away to confirm the battery is making contact.
Identify your Nissan fob type and battery size
Look at the back of your fob. If you see a small horizontal metal tab or slot near the edge, your fob uses a slide-open design. If the two plastic halves meet in a visible seam all the way around, your fob pries open. Both designs are common on Nissan vehicles made between 2010 and now.
To find out which battery your fob needs, check your owner's manual—it will list the battery type in the key fob section. If you do not have the manual, you can also open the fob and look at the battery itself; the type is printed on top. CR2032 is the most common size for Nissan fobs, but some models use CR2025 or CR2016. Buy the exact type your fob uses; they are not interchangeable.
Open a slide-tab fob
Locate the small metal tab on the back of the fob, usually near the bottom edge. Push or slide this tab in the direction the arrow points (most fobs have a tiny arrow stamped next to it). The tab will move slightly and release a catch inside. The two plastic halves will separate just enough for you to pull them apart by hand.
If the tab is stiff, do not force it—you may break the plastic. Instead, try sliding it in the opposite direction, or look for a second tab on the other edge. Once the halves separate, you will see the battery sitting in a metal holder in the center of one half. The holder has two small metal clips that grip the battery on the sides.
Open a pry-seam fob
Look for the seam that runs around the edge where the two plastic halves meet. Insert a coin (a dime or penny works well) or a flat plastic tool into the seam at the point where it looks widest or where you see a small notch. Gently twist the coin or tool to pry the halves apart, working your way around the seam if needed.
Do not use a sharp metal tool like a knife or screwdriver—you will scratch the plastic or slip and damage the circuit board inside. A coin is safer and gives you enough leverage. Once the halves separate, you will see the battery in its metal holder in the center. The battery is held in place by two metal clips on either side.
Remove and replace the battery
Before you touch the battery, note which side is facing up. The positive side (marked with a + symbol) should be facing either up or down depending on your fob design. Slide the battery out sideways from between the metal clips. Do not pry it straight up, or you may bend the clips.
Take your new battery and slide it in the same way, making sure the positive side faces the same direction as the old battery did. The metal clips should grip the battery snugly on both sides. If the battery is loose or falls out when you turn the fob over, remove it and reposition it until the clips hold it firmly.
Close the fob and test it
Line up the two plastic halves so the seams match all the way around. For a slide-tab fob, push the halves together until they click, then slide the metal tab back to its original position. For a pry-seam fob, press the halves together firmly until you hear or feel a click all the way around the edge.
Once the fob is closed, stand near your car and press the lock button. You should hear the doors lock. Press unlock and listen for the doors to unlock. Test all four buttons if your fob has separate lock and unlock buttons for front and rear doors. If nothing happens, open the fob again and check that the battery is seated properly in the clips and facing the right direction.
What to do if the fob still does not work
If you installed a new battery and the fob still does not respond, the battery may not be making contact with the metal clips. Open the fob again and look at the two metal clips inside. If they are bent outward or do not grip the battery tightly, gently bend them inward with a coin or plastic tool so they hold the battery more firmly.
If the clips look fine and the battery is seated correctly, the problem may be inside the fob itself—a broken circuit board or corroded contacts. In that case, you will need a replacement fob from a Nissan dealer or a third-party fob seller. A dealer fob costs between 200 and 400 dollars and usually comes programmed to your car; a third-party fob costs less but may require programming at a dealer or by a locksmith.
Frequently Asked Questions
How long does a Nissan key fob battery last?
Most Nissan fob batteries last three to four years with normal use. If you use your fob several times a day, the battery may wear out sooner. If you rarely use it, it may last longer. You will know it is time to replace it when the fob stops locking or unlocking doors from your normal distance, or when you have to press the button multiple times to get a response.
Can I use a different battery size if I cannot find the right one?
No. CR2032, CR2025, and CR2016 are different sizes and will not fit properly in the holder or make good contact with the clips. Using the wrong size can damage the fob or cause it to stop working. Stick with the exact battery type your fob needs. If your local store does not have it, order it online—it will arrive in one or two days and costs the same.
Do I need to reprogram my fob after changing the battery?
No. Changing the battery does not erase the fob's programming. Once you install the new battery and close the fob, it should work when ready without any reprogramming steps. If it does not work after you have confirmed the battery is installed correctly, the fob may have a deeper problem that requires dealer service.
What if I accidentally mixed up which side of the battery faces up?
The fob will not work if the battery is installed backwards. Open the fob, flip the battery so the positive side faces the correct direction, and close it again. If you are not sure which way is correct, look at the metal holder inside the fob—one side usually has a small + symbol or marking that shows which side should face that direction.
Can I replace the battery in a smart key or push-button fob?
Yes, the process is the same. Nissan smart keys and push-button fobs use the same coin-cell batteries as traditional fobs. Open the fob using the same slide-tab or pry-seam method, swap the battery, and close it. The only difference is that smart keys may have a slightly different internal layout, but the battery replacement steps are identical.