You can replace a Nissan key fob battery yourself in about five minutes with no tools
Most Nissan key fobs use a coin-cell battery — typically a CR2032 or CR2025 — that you can swap out at home without taking the fob apart or visiting a dealer. The battery usually lasts three to four years depending on how often you use the fob. When your buttons stop responding or the lock and unlock range shrinks, the battery is almost certainly dead.
The process is straightforward: you pry open the fob case with a coin or flat object, note which side of the battery faces outward, remove the old battery, and drop in a new one the same way. You do not need a screwdriver, a special tool, or any technical knowledge. A replacement battery costs between $3 and $8 at any pharmacy, grocery store, or hardware store.
Key Takeaways
- Nissan key fobs almost always use a CR2032 or CR2025 coin-cell battery that you can buy at any drugstore or supermarket for a few dollars.
- Open the fob by inserting a coin or flat object into the seam and gently twisting to separate the two halves.
- Note which side of the battery faces up before you remove it, then install the new battery the same way.
- If the fob still does not work after you install a fresh battery, the problem is likely the fob itself, not the battery.
What battery your Nissan key fob uses
Check your owner's manual or the back of your fob itself — most Nissan fobs print the battery type right on the case. The vast majority use either a CR2032 (the most common) or a CR2025. Both are coin-shaped lithium batteries about the size of a dime, and both cost the same.
If your fob does not print the battery type, you can open it and look at the old battery before you buy a replacement. The battery number is stamped on the flat side. Take a photo with your phone and bring it to the store, or straightforward buy a CR2032 — it works in most Nissan fobs and is the easiest to find.
How to open your Nissan key fob
Look for a small seam running around the edge of the fob where the two plastic halves meet. Insert a coin (a penny or dime works well) or a flat object like a butter knife into the seam. Do not use a sharp object like a screwdriver — you risk cracking the plastic.
Once the coin is in the seam, gently twist it as if you were opening a jar. You should feel the two halves start to separate. Work your way around the seam if needed, twisting a little at a time, until the fob pops open. The two halves are held together by friction, not screws, so they come apart easily once you explore steady pressure.
Set the two halves on a clean surface where you can see the battery clearly. The battery will be sitting in a small plastic holder or slot, usually in the center of one half.
Removing and replacing the battery
Before you touch the old battery, look at which side is facing up — the side with the + symbol or the printed numbers. This is important: you must install the new battery the same way, with the same side facing up.
Gently pry the old battery out of its slot using a coin or your fingernail. Do not force it. Once it is loose, lift it straight out and set it aside. If the battery is stuck, try prying from the opposite edge.
Take your new battery and orient it so the same side (+ or printed side) faces up, just like the old one did. Drop it into the slot. It should sit flat and snug. If it does not fit or feels loose, you may have the wrong battery type — check the number on the old battery again.
Closing the fob and testing it
Line up the two halves of the fob so the seams match. Press them together firmly until you hear or feel a click. The fob should snap shut without gaps. If it does not close all the way, the battery may be installed upside down or the halves may be misaligned — open it again and check.
Once the fob is closed, test it by pressing the lock and unlock buttons while standing near your car. You should hear the car respond or see the lights flash. If the fob works, you are done. If it still does not work after you have installed a fresh battery the correct way, the fob itself may be damaged and you will need a replacement from a Nissan dealer.
Where to buy a replacement battery
CR2032 and CR2025 batteries are sold everywhere: pharmacies like CVS and Walgreens, grocery stores, hardware stores like Home Depot and Lowe's, and online retailers like Amazon. You can also find them at dollar stores. A single battery usually costs $3 to $8, though buying a pack of two or four is often cheaper per battery.
Make sure you are buying a lithium coin-cell battery, not an alkaline one. The package will say "CR2032" or "CR2025" clearly on the front. Avoid generic or off-brand batteries if you can — name brands like Energizer, Duracell, and Panasonic are more reliable and cost only slightly more.
When to call a Nissan dealer instead
If you have replaced the battery and the fob still does not work, the problem is not the battery. The fob may have water damage, a broken button, or a faulty circuit board. A Nissan dealer can diagnose the issue and sell you a replacement fob, which usually costs between $200 and $400 depending on the model year and whether it has a remote start feature.
Some dealers will program a used fob from a salvage yard for less money. If your fob is under warranty, contact your dealer to ask whether the repair or replacement is covered. If you have a spare fob, test it first — if the spare works fine, you know the problem is your original fob, not your car's receiver.
Frequently Asked Questions
Can I use a different battery type if I cannot find a CR2032?
Not safely. CR2032 and CR2025 are not interchangeable — they have different thicknesses and voltages. Using the wrong battery can damage the fob's circuit board or cause the buttons to malfunction. Stick with the exact type your fob needs. If your store is out of stock, order online or try another store.
What do I do with the old battery?
Lithium coin-cell batteries are recyclable and should not go in the trash. Most pharmacies and electronics stores have battery recycling bins near the checkout. You can also take old batteries to a local recycling center. Check Earth911.com or call your city's waste management office to find a drop-off location near you.
How long does a new battery last in a Nissan key fob?
A fresh CR2032 or CR2025 typically lasts three to four years in normal use. If you use your fob very frequently — unlocking your car multiple times a day — the battery may wear out faster, sometimes in two to three years. If you rarely use it, it may last longer.
Can water damage ruin a key fob battery?
Water can damage the fob's circuit board and buttons, but the battery itself is usually fine. If your fob got wet, open it, dry the inside thoroughly with a soft cloth, and install a fresh battery. If the fob still does not work, the water likely damaged the electronics, not the battery.
Do I need to reprogram my key 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.