Replace the battery yourself in under five minutes
You can replace a Nissan Altima key fob battery without tools or a trip to the dealer. The battery sits behind the fob's plastic case, which opens by hand or with a coin. Most Altimas use a CR2032 battery, which costs two to five dollars at any drugstore or supermarket. The whole job takes about three minutes once you have the new battery in front of you.
The steps are the same whether your Altima is from 2007 or 2024, because Nissan has kept the fob design consistent. You do not need to reprogram anything after you swap the battery — the fob will work when ready.
Key Takeaways
- Most Nissan Altima key fobs use a CR2032 battery, which you can buy at a pharmacy, grocery store, or dollar store for under five dollars.
- The fob case opens by sliding a small metal tab or prying gently with a coin along the seam between the two halves.
- Once open, the battery sits in a metal holder and lifts straight out; the new battery goes in with the plus side facing up.
- You do not need to reprogram the fob after replacing the battery — it will work as soon as you close the case.
- If the fob still does not work after a new battery, the problem is likely a broken button contact or internal damage, not the battery itself.
What battery type your Altima key fob needs
Nissan Altima key fobs from 2007 onward use a CR2032 coin cell battery. This is a round, flat battery about the size of a dime and slightly thicker. You will find CR2032 batteries at any pharmacy (CVS, Walgreens), grocery store (Kroger, Safeway, Whole Foods), dollar store, or big-box retailer (Target, Walmart). A single battery costs between two and five dollars; a pack of two or four costs slightly less per unit.
Do not buy a generic "key fob battery" pack unless it specifically says CR2032 on the label. Some aftermarket packs contain the wrong size and will not fit. The safest choice is to buy a name-brand CR2032 — Energizer, Duracell, and Panasonic all make them, and they perform identically.
How to open the key fob case
The Nissan Altima key fob splits into two plastic halves held together by a small metal tab or slot. Look at the edge of the fob where the two halves meet — you will see a thin seam running around the perimeter. On most Altimas, there is a small notch or slot on one side of this seam.
If your fob has a visible slot, slide a flathead screwdriver or coin (a dime or penny works) into the slot and twist gently. The two halves will separate. If there is no visible slot, use a coin to pry along the seam starting at one corner. Work your way around the edge slowly — the case is plastic and will crack if you force it. Once you feel it give, the halves will come apart in your hands.
Do not pull the two halves completely apart yet. The circuit board inside is connected to the buttons by thin plastic clips. Open the fob just enough to see inside, and you will spot the battery when ready — it is a round, silver disc sitting in a metal holder.
Remove the old battery and install the new one
The battery sits in a metal clip or holder with two small prongs. Gently lift the battery straight up and out of the holder. It will come free with light pressure — do not pry or force it. Set the old battery aside.
Take the new CR2032 battery and look at both sides. One side is marked with a plus sign (+) and is slightly raised; the other side is flat and unmarked. The plus side must face upward toward the top of the fob. Slide the new battery into the metal holder with the plus side up, and press down gently until it clicks into place.
Close the fob by pressing the two halves together. You will hear or feel a small click when the metal tab locks. The fob is now ready to use — no reprogramming is needed.
Test the fob before you put it away
Stand near your Altima and press any button on the fob — the lock, unlock, or panic button. You should see the car's lights flash or hear the locks engage. If nothing happens, open the fob again and check that the battery is seated correctly in the metal holder and that the plus side is facing up.
If the fob still does not work after you reseat the battery, the problem is not the battery. The issue is likely a worn button contact, a cracked circuit board, or corrosion inside the fob. In that case, you will need a replacement fob from a Nissan dealer or a third-party supplier.
Where to buy a replacement fob if this one is broken
A new Nissan Altima key fob from a dealer costs between 200 and 400 dollars, depending on the year and whether it has a remote start button. A third-party fob (made by companies like IKeyless or Strattec) costs between 50 and 150 dollars and works the same way, but you will need to have it programmed by a dealer or a locksmith, which adds another 50 to 100 dollars.
Before you buy a replacement, try the battery swap one more time. Open the fob, clean the metal contacts on the battery holder with a dry cloth, and make sure the battery is new and not expired. Many fobs that seem broken are actually just suffering from a weak battery or dirty contacts.
Frequently Asked Questions
Can I use a different battery size if I cannot find a CR2032?
No. A CR2032 is the only size that fits the Nissan Altima key fob battery holder. Other coin cell batteries like CR2025 or CR2016 are too thin and will not make contact with the metal prongs. Buy the correct size — it is inexpensive and widely available.
How often do I need to replace the key fob battery?
A CR2032 battery in a key fob typically lasts three to four years with normal use. If you use the fob several times a day, it may last two to three years. If you use it rarely, it can last five years or longer. You will notice the range getting shorter before the battery dies completely — if you have to stand closer to the car for the fob to work, the battery is running low.
What if the fob case will not open?
If the seam is too tight, try warming the fob gently with warm water (not hot) for a minute. This softens the plastic slightly and makes it easier to pry apart. Alternatively, use a plastic spoon or butter knife instead of a coin — they are less likely to slip and damage the case. If the fob is cracked or the seam is damaged, do not force it; a locksmith or dealer can open it for you.
Do I need to reprogram the fob after changing the battery?
No. The battery change does not affect the fob's programming. As soon as you close the case and the battery makes contact, the fob will work exactly as it did before. Reprogramming is only needed if you buy a new fob or if the fob loses its pairing with the car for another reason.
Is it safe to touch the battery with my bare hands?
Yes. CR2032 batteries are safe to handle with bare hands. They do not carry enough current to cause injury. If you have a cut on your finger, it is fine to touch the battery — the voltage is too low to cause any problem. Wash your hands afterward if you prefer, but it is not necessary.