Most Nissan key fobs use a CR2032 or CR2025 coin battery you can swap yourself without tools
You can change your Nissan key fob battery at home in about five minutes. The battery is a small coin-shaped cell — usually a CR2032 or CR2025 — that costs between $3 and $8 at any drugstore, supermarket, or hardware store. You do not need a screwdriver, special tools, or a trip to the dealer.
The exact steps depend on which Nissan model and key fob generation you have, but the process is nearly identical across all of them: pry the fob open, remove the old battery, drop in the new one, and snap it closed. If your fob still does not work after the battery swap, the problem is usually a worn contact or a dead fob — not the battery itself.
Key Takeaways
- Nissan key fobs typically use a CR2032 or CR2025 battery, which you can buy at any pharmacy or grocery store for under $10.
- Most fobs open by sliding a small metal tab or prying gently at the seam with a coin or plastic tool — no screwdriver needed.
- The battery sits in a small metal holder; note which side faces up before you remove it so you install the new one the same way.
- If the fob still does not work after you install a fresh battery, the problem is usually dirty contacts or a failed circuit board, not the battery.
Identify your battery type before you buy
Nissan uses two main coin batteries in its key fobs: the CR2032 (slightly thicker) and the CR2025 (slightly thinner). Both are 20 millimeters in diameter. The easiest way to know which one you need is to open your fob and look at the battery itself — the type is printed on top.
If you cannot open the fob yet, check your owner's manual or call your Nissan dealer with your vehicle year and model. You can also buy a CR2032 first — it is the more common of the two — and if it does not fit snugly in the holder, swap it for a CR2025. Both cost the same and are sold everywhere.
How to open your Nissan key fob
Most newer Nissan fobs have a small metal tab or slot on the side or bottom. Slide this tab toward the edge of the fob to separate the two halves. If there is no tab, look for a thin seam running around the edge. Use a coin, a plastic spoon handle, or a plastic pry tool to gently work the seam open — start at one corner and work your way around.
Do not force it. If you feel strong resistance, stop and look for a hidden tab or slot you may have missed. Older Nissan fobs sometimes have a small screw on the back; if you see one, use a Phillips screwdriver to remove it, then the halves will separate. Once the fob is open, set the back half aside and look at the battery holder.
Remove the old battery and install the new one
The battery sits in a small metal or plastic holder with two contact points — one on top and one on the bottom. Note which side of the battery faces up (usually the flat side with the printed type number). Gently pry the battery out with your fingernail or a plastic tool — do not use a metal screwdriver, as it can damage the contacts.
Drop the new battery into the holder with the same side facing up as the old one. The battery should sit flat and snug. If it is loose or tilts, you may have the wrong type — swap it for the other size and try again. Once it is seated, press down gently to make sure it makes contact with both the top and bottom points.
Close the fob and test it
Align the two halves of the fob and press them together firmly until you hear or feel a click. If your fob has a metal tab, slide it back into place. If it has a screw, replace and tighten it — do not over-tighten, or you may crack the plastic.
Stand a few feet from your car and press the lock and unlock buttons. You should hear the car respond. If the fob still does not work, try pressing the buttons a few more times — sometimes a new battery needs a moment to make full contact. If it still fails after 10 seconds, the problem is likely inside the fob, not the battery.
What to do if the fob still does not work
A dead fob after a fresh battery usually means one of three things: the battery contacts are dirty or corroded, the circuit board inside is damaged, or the fob was already failing before the battery died. Check the metal contacts inside the battery holder — they should be shiny. If they look dark or crusty, clean them gently with a dry cloth or a pencil eraser, then reinstall the battery.
If cleaning the contacts does not help, the fob itself has failed and needs replacement. You can buy an aftermarket Nissan key fob online for $30 to $80 and program it yourself using your owner's manual, or you can have your dealer program a new one for you — that usually costs $150 to $300. Before you replace the fob, make sure your car battery is not dead; a weak car battery can prevent the fob from working even if the fob battery is fresh.
Where to buy a replacement battery
CR2032 and CR2025 batteries are sold at pharmacies (CVS, Walgreens), grocery stores, hardware stores (Home Depot, Lowe's), and online retailers. A single battery costs $3 to $8; multi-packs are cheaper per battery if you have multiple fobs. Buy a name brand like Duracell or Energizer if you can — they last longer and have better contact reliability than very cheap generic batteries.
Keep a spare battery in your car or at home. Key fob batteries typically last three to four years, so if you have an older fob, a fresh battery is often the first thing to try when it stops working.
Frequently Asked Questions
Can I use a different battery type if I cannot find the right one?
CR2032 and CR2025 are not interchangeable — they are different thicknesses. If you install the wrong one, it will either be too loose and lose contact, or too tight and not fit at all. Buy the correct type for your fob. If you are unsure, a battery shop or pharmacy can tell you which one fits by looking at your fob.
How long does a Nissan key fob battery last?
Most coin batteries last three to four years with normal use. Heavy use — pressing the buttons many times a day — can shorten that to two years. If your fob is older than four years and stops working, a fresh battery is the first thing to try.
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. If it does not, the problem is not the battery swap — it is something else inside the fob.
What if the battery holder is cracked or the contacts look damaged?
If the plastic holder is cracked or the metal contacts are bent, the fob cannot be repaired at home. You will need a replacement fob. Your Nissan dealer can order one and program it for you, or you can buy an aftermarket fob online and program it using your owner's manual.
Can I clean the battery contacts to make the fob work better?
Yes. If the contacts look dark or corroded, gently rub them with a clean, dry cloth or a pencil eraser to remove oxidation. This can sometimes restore a fob that works intermittently. Do not use water or liquid cleaners — they can damage the circuit board.