You can change a Nissan key fob battery yourself in under five minutes with no tools
Most Nissan key fobs use a coin-cell battery—usually CR2032 or CR2025—that you can buy at any drugstore, supermarket, or hardware store for a few dollars. The battery slides into a compartment inside the fob, and opening that compartment requires no screwdriver or special tool. You straightforward pry the two halves of the fob apart by hand or with a flat object like a coin or butter knife, swap the old battery for the new one, and snap the fob back together. The whole job takes about three minutes.
The hardest part is usually finding which direction the battery goes in. Nissan fobs have a small diagram printed inside the battery compartment showing the correct orientation—the positive side (marked with a +) faces up or down depending on your fob model. If you install it backward, the fob straightforward will not work, but the battery will not be damaged. Flip it over and try again.
Key Takeaways
- Nissan key fobs typically use CR2032 or CR2025 coin-cell batteries, available at any pharmacy or grocery store for under five dollars.
- Open the fob by prying the two halves apart with your fingernail, a coin, or a butter knife—no screwdriver needed.
- Check the diagram printed inside the battery compartment to see which way the battery should face before you install it.
- If the fob does not work after you replace the battery, the battery may be installed backward; flip it over and try again.
- If a new battery does not restore the fob's function, the fob itself may need replacement, which a Nissan dealer can provide.
What battery your Nissan key fob uses
Nissan key fobs from the past 15 years almost always use either a CR2032 or CR2025 lithium coin-cell battery. The CR2032 is slightly thicker and holds a bit more charge; the CR2025 is thinner. Both are the same diameter and fit the same compartment. If you are not sure which one your fob uses, open the fob first and look at the battery already inside—the model number is printed on the metal case.
You can buy either battery at a pharmacy, grocery store, dollar store, or hardware store. They cost between two and five dollars. Some people buy them online in bulk, but for a single replacement, a local store is faster and cheaper than shipping. Do not buy the cheapest generic brand; stick with Duracell, Energizer, or Panasonic, which hold their charge longer and are less likely to leak inside your fob.
How to open your Nissan key fob
The two halves of a Nissan key fob are held together by a seam that runs around the edge. You can see a thin gap between the two halves if you look closely. Slide your fingernail, a coin, or a flat butter knife into that gap on the side opposite the key ring attachment. Gently pry upward. The two halves will separate with a small click.
If your fingernail is not strong enough, a coin works well—a penny or dime fits the gap easily. A butter knife is safer than a screwdriver because it is less likely to slip and scratch the plastic. Do not use a sharp blade or a tool that could damage the fob's circuit board. Once you feel the fob start to separate, you can usually pull the two halves apart by hand.
Inside, you will see the battery sitting in a small metal compartment, usually in the center. The battery is held in place by the shape of the compartment itself—it does not snap in or require any fastener. You can straightforward lift it out with your fingernail or the edge of a coin.
Installing the new battery the right way
Before you put the new battery in, look at the inside of the fob. Nissan prints a small diagram on the plastic showing which side of the battery should face up. The diagram shows a + symbol on one side. The + marks the positive terminal. Make sure the positive side faces the direction shown in the diagram.
Slide the new battery into the compartment with the correct side facing up. It should sit flat and level. You do not need to press hard—the compartment holds it in place by itself. If the battery feels loose or tilted, remove it and check the diagram again. A battery installed backward will not hurt anything; the fob straightforward will not work until you flip it over.
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 be snug and not rattle. If there is a gap, the halves are not fully seated—press harder until they snap together.
Test the fob by pressing the lock and unlock buttons while standing near your car. You should see the lights flash and hear the locks click. If nothing happens, open the fob again and check that the battery is facing the right direction. Flip it over and try again. If the fob still does not work after you have tried both directions, the battery may be defective—try a fresh one from a different package. If a new battery in the correct direction still does not work, the fob's circuit board may be damaged, and you will need a replacement fob from a Nissan dealer.
When to replace the whole fob instead of just the battery
If you have installed a fresh battery in the correct direction and the fob still does not work, the problem is not the battery. The circuit board inside may have failed, or water may have gotten inside and corroded the contacts. A Nissan dealer can order a replacement fob and program it to your car. This usually costs between 200 and 400 dollars, depending on your model year and whether your car has a push-button start.
Some people buy aftermarket fobs online for less money, but these are hit-or-miss—some work perfectly, and others never program correctly or stop working after a few months. A dealer fob costs more but comes with a warranty and is may provide to work with your specific car. If your fob is under warranty, Nissan may replace it for free or at a reduced cost; call your dealer to ask.
Frequently Asked Questions
Can I use a different battery size if I cannot find CR2032?
No. CR2032 and CR2025 are not interchangeable with other battery types. If your fob uses CR2032, only CR2032 will fit and work. Check the battery compartment diagram or call a Nissan dealer to confirm which size your fob needs. Most stores stock both sizes, so finding the right one should not be difficult.
What if I installed the battery backward and now the fob does not work?
Open the fob again and flip the battery over so the opposite side faces up. A backward battery will not damage anything—it straightforward breaks the electrical connection. Once you flip it to match the diagram, the fob should work when ready.
How long does a Nissan key fob battery last?
A CR2032 or CR2025 battery typically lasts three to four years in a key fob, depending on how often you use it. If you press the buttons dozens of times a day, the battery may wear out sooner. You will notice the fob working at shorter distances before it stops working entirely.
Is it safe to replace the battery myself, or should I go to a dealer?
It is completely safe to replace the battery yourself. There is no risk of damaging the fob or your car. The only thing that can go wrong is installing the battery backward, which straightforward means the fob will not work until you flip it over. A dealer will charge you 50 to 100 dollars to do the same job.
What should I do with the old battery?
Lithium coin-cell batteries can be recycled. Many pharmacies and electronics stores have battery recycling bins near the checkout. You can also check Earth911.com or call your local waste management office to find a recycling location near you. Do not throw the battery in the trash.