Most Nissan key fobs use a CR2032 battery you can swap in two minutes
Open your Nissan key fob by locating the small slot or seam on the edge — usually on the side where the key blade sits. Use a flat tool like a coin or flathead screwdriver to gently pry the two halves apart. The battery sits in a metal holder and slides out toward you. Note which side faces up (the positive side is marked with a + symbol), then slide the new CR2032 battery in the same way. Press the halves back together until they click.
The whole job takes longer to read about than to do. You do not need any special tools, and the battery costs between $3 and $8 at any pharmacy, grocery store, or hardware retailer.
Key Takeaways
- Nissan key fobs almost always use a CR2032 coin-cell battery, which you can buy at any drugstore or supermarket for a few dollars.
- The fob opens by prying the seam with a coin or flat tool — no screws to remove on most models.
- The battery slides out and in; pay attention to which side faces up so you do not install it backward.
- After you close the fob, test the buttons to confirm the new battery is working before you leave the store or parking lot.
Finding the seam and opening your fob
Look at the edge of your key fob where the two plastic halves meet. On most Nissan fobs, this seam runs along the side where the key blade emerges. Some models have a small notch or slot cut into the edge to make it easier to grip. If you do not see an obvious slot, the seam itself is your target.
Use a coin — a quarter or dime works well — or a small flathead screwdriver. Insert the edge into the seam and twist gently. You are not forcing it; the two halves are held together by a clip, not glued. A light twist should separate them enough to pull them apart by hand. If it does not budge after a gentle try, rotate the fob and try a different spot along the seam.
Removing and replacing the battery
Once the fob is open, you will see the battery in a metal holder. It is a small, flat, coin-shaped cell. The positive side (marked with a +) faces up. Slide the battery toward the edge of the holder — it will come free with a gentle push. Do not force it; it should slide out easily.
Before you insert the new battery, check the part number printed on the old one. It should say CR2032. If it does, buy a CR2032 replacement. If the number is different, buy that number instead. Slide the new battery into the holder with the positive side facing up, the same way the old one was oriented. You will hear or feel a small click when it seats properly.
Closing the fob and testing it
Align the two halves of the fob so the seams match up. Press them together firmly until you hear a click. The clip should snap into place. Do not force it; if it does not close smoothly, open it again and check that the battery is seated correctly and nothing is blocking the clip.
Test the lock and unlock buttons right away. Press each one a few times to confirm the fob is working. If nothing happens, open the fob again and check that the battery is facing the right direction. A battery installed backward will not work, but it also will not damage the fob — flip it and try again.
What to do if your fob will not open
If the seam will not budge, you may have a model with a different design. Some older Nissan fobs have a small screw hidden under a rubber pad on the back. Check the back and sides for a tiny rubber cover or label. If you find one, peel it back carefully to see if a screw is underneath.
If there is no screw and the seam still will not open, try a plastic pry tool instead of metal — a plastic spoon handle or old credit card can work. Metal tools can scratch the plastic, but plastic is gentler. If the fob still will not open after several gentle attempts, the clip may be broken. In that case, a Nissan dealer or locksmith can open it for you, though the cost will be more than the battery itself.
Where to buy CR2032 batteries
CR2032 batteries are sold everywhere. Check the pharmacy section of any grocery store, the battery aisle at hardware stores like Home Depot or Lowe's, drugstores like CVS or Walgreens, and big-box retailers like Walmart or Target. You can also order them online from Amazon or eBay. A single battery costs $3 to $8; a pack of four or more usually costs less per battery.
Buy a name brand if you can — Energizer, Duracell, or Panasonic. Generic batteries work fine, but name brands tend to last longer. Do not buy the cheapest option if it is from an unknown seller; counterfeit batteries exist and may not work or may leak.
Signs your key fob battery is dying
Before the battery dies completely, you will usually notice the buttons require harder presses or work only from very close to your car. The range shrinks first — you have to stand closer to the door to unlock it. Then the buttons become less responsive. If you have to press a button multiple times to get a response, the battery is nearly dead.
Some fobs have a low-battery indicator light, though most Nissan fobs do not. If your fob suddenly stops working entirely, the battery is dead. A dead battery does not mean the fob is broken; a new battery almost always brings it back to life.
Frequently Asked Questions
Can I use a different battery size if I cannot find a CR2032?
No. The battery holder is sized for CR2032, and a different size will not fit or will not make proper contact. CR2032 batteries are extremely common and sold at nearly every store that sells batteries. If one store is out, another nearby will have them.
What happens if I install the battery backward?
The fob straightforward will not work. The buttons will not respond. Open the fob again and flip the battery so the positive side (marked +) faces up. This will not damage the fob or the battery.
How long does a CR2032 battery last in a key fob?
Most CR2032 batteries last two to four years in a key fob, depending on how often you use it. Heavy users may need a replacement sooner; light users may get four or five years. There is no way to predict exactly when it will die, but the gradual loss of range is usually your first warning.
Do I need to reprogram my key fob after changing the battery?
No. Changing the battery does not erase any programming. Your fob will work exactly as it did before, as soon as the new battery is installed and the fob is closed.
What should I do with the old battery?
CR2032 batteries contain small amounts of lithium and should not go in the trash. Most stores that sell batteries also accept used batteries for recycling. Ask at the customer service desk, or check Earth911.org to find a recycling location near you.