Open the fob and swap the battery in five minutes
Most Jeep key fobs use a coin-cell battery — usually CR2032 or CR2025 — that you can replace yourself without tools or a trip to the dealer. The battery sits behind a removable cover on the back of the fob. You pry the cover open, note which side of the battery faces up, slide in the new one the same way, and snap the cover back. The whole job takes about five minutes and costs $3 to $8 for the battery.
The steps below work for Jeep fobs from the 2000s onward. If your fob is older or has a different shape, the battery compartment may be in a different spot, but the principle is the same: find the seam, open it, and replace the cell.
Key Takeaways
- Jeep key fobs almost always use CR2032 or CR2025 coin-cell batteries, which you can buy at any pharmacy, grocery store, or hardware store for a few dollars.
- The battery compartment is on the back of the fob and opens by prying along the seam with a coin or flat object — no screwdriver needed.
- Note which side of the old battery faces outward before you remove it, then install the new one the same way.
- If the fob still does not work after you replace the battery, the problem is likely a worn button contact or a dead circuit board, not the battery itself.
Find out what battery your fob needs
The easiest way is to open the fob and look at the old battery. The battery type is printed on its face — CR2032 is the most common in Jeep fobs, but some models use CR2025 or CR2016. If you cannot open the fob yet, check your owner's manual or search online for your Jeep model year and "key fob battery type."
Once you know the type, you can buy a replacement at a pharmacy, grocery store, dollar store, or hardware store. Most places stock them in the watch and battery section. You can also order them online, but buying locally means you can start the replacement the same day.
Locate the seam on the back of the fob
Hold the fob in your hand with the buttons facing away from you. Look at the back — you will see a thin line running around the edge where the two halves of the plastic case meet. This is the seam you need to open.
Some fobs have a small slot or notch on one side of the seam to make it easier to pry open. If you see one, that is where you should start. If not, pick any point along the seam — it does not matter which one.
Pry open the fob with a coin or flat object
Insert a coin (a penny or dime works well) or a flat plastic tool into the seam. Push gently but firmly to separate the two halves. You are not trying to force it — just explore steady pressure until you feel the case start to give. The two halves should slide apart without cracking.
If the fob is stuck, try a different spot along the seam. Sometimes one side opens more easily than the other. Once you have a gap, you can work your fingers in to pull the halves apart the rest of the way.
Remove the old battery and note its position
When you open the fob, you will see the battery sitting in a small compartment, usually held in place by a metal clip or spring. Before you touch it, look at which side faces outward — the positive side (marked with a + symbol) or the negative side (marked with a − symbol). This matters because the battery only works one way.
Gently pry the battery out using the edge of a coin or your fingernail. Be careful not to damage the metal contacts or the plastic compartment. Once it is out, set it aside.
Insert the new battery the same way
Take your new battery and place it in the compartment with the same side facing outward as the old one. If the positive side faced up on the old battery, the positive side should face up on the new one. Slide it in until the metal clip or spring holds it in place.
Do not force it. The battery should sit flat and stay put without pressure. If it feels loose or sits at an angle, remove it and try again — it may not be fully seated.
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. The seam should be flush all the way around. Test the fob by pressing each button — the lock, unlock, and panic buttons should all work. If you have a Jeep nearby, test it from a distance to make sure the signal reaches the vehicle.
If the fob still does not work after you replace the battery, the problem is likely worn button contacts inside the fob or a circuit board that has failed. In that case, you will need a replacement fob from a Jeep dealer or a third-party supplier.
Frequently Asked Questions
Can I use a different battery type if I cannot find the exact one?
No. CR2032, CR2025, and CR2016 are different sizes and voltages. Using the wrong type may not fit in the compartment or could damage the fob's circuit board. Buy the correct type for your fob.
What if I cannot get the fob open?
Try a different spot along the seam — some fobs open more easily on one side. If you still cannot open it after trying several spots, a Jeep dealer or locksmith can open it for you, though you will pay a service fee.
How long does a key fob battery last?
Most coin-cell batteries last three to four years in a key fob, depending on how often you use it. If you use the fob daily, you may need to replace it sooner. There is no way to predict exactly when it will die.
Do I need to reprogram the fob after I replace the battery?
No. Replacing the battery does not erase the fob's programming. It should work when ready after you close the case and install the new battery.
Where can I buy a replacement battery?
Pharmacies, grocery stores, dollar stores, hardware stores, and online retailers all stock CR2032 and CR2025 batteries. Prices are usually between $3 and $8 per battery. Some stores sell them in multipacks if you want to keep spares on hand.