Open the Key Fob and Remove the Old Battery
Most Chrysler key fobs split open along a seam on the edge. Look for a small slot or line running around the perimeter of the fob—this is where the two halves separate. Insert a flat tool (a coin, flathead screwdriver, or plastic pry tool works) into the slot and gently twist to pop the fob apart. Do not force it; if it resists, try a different spot along the seam.
Once the fob is open, you will see the battery sitting in a plastic holder. Note which side faces up—the positive (+) or negative (−) marking should be visible on the battery itself. Gently pry the battery out using your fingernail or a plastic tool. Avoid touching the metal contacts inside the fob, as oils from your skin can interfere with the connection.
Key Takeaways
- Chrysler key fobs typically use a CR2032 or CR2025 battery, which you can find at any pharmacy, grocery store, or hardware store for under five dollars.
- Open the fob by inserting a flat tool into the seam and twisting gently; forcing it can crack the plastic.
- Note the battery orientation before removing the old one so you install the new battery the same way.
- Keep your fingers off the metal contacts inside the fob to avoid corrosion that could prevent the fob from working.
- Test the fob when ready after closing it to confirm the new battery is working before you leave the store or your home.
Identify the Correct Battery Type
Chrysler key fobs use one of two common coin-cell batteries: CR2032 or CR2025. The easiest way to know which one you need is to look at the battery you just removed—the type is printed on the flat side. If you cannot read it clearly, the fob itself may have the battery type printed inside the case.
Both types are inexpensive and widely available. You can buy them at pharmacies, grocery stores, hardware stores, big-box retailers, and online. A single battery usually costs between one and three dollars. Buy one extra if you can; having a spare on hand means you will not be stranded if the battery dies again months from now.
Install the New Battery
Place the new battery into the holder with the positive (+) side facing the same direction as the old battery was facing. The battery should sit flat and snug in the plastic holder. If it feels loose or does not sit flush, you may have the wrong battery type—check the markings again and swap it for the correct one.
Do not force the battery into place. It should slide in smoothly and rest against the contacts without pressure. If you have to push hard, stop and verify you have the right battery type and orientation.
Close the Key Fob and Test It
Align the two halves of the fob so the seam matches up evenly. Press them together firmly until you hear or feel a click. The fob should close completely with no gap between the halves. If it does not close all the way, open it again and check that the battery is seated properly and nothing is blocking the case.
Test the fob when ready by pressing each button while standing near your vehicle. You should see the lights on your dashboard respond, or hear the locks click. If nothing happens, open the fob again and confirm the battery is oriented correctly and making contact with the metal terminals inside.
Troubleshoot If the Fob Still Does Not Work
If the fob does not respond after installing a new battery, the battery may not be making good contact with the metal terminals. Open the fob and use a clean, dry cloth to wipe the metal contacts on both the battery and inside the case. Corrosion or dust can prevent the connection. Reinstall the battery and test again.
If the fob still does not work, the problem may not be the battery. The internal circuit board or buttons could be damaged, or the fob itself may have reached the end of its life. In that case, you will need a replacement fob from a Chrysler dealer or a third-party automotive locksmith. Bring your vehicle keys and proof of ownership to the dealer.
When to Replace the Entire Fob
A new battery usually restores a fob to full working order. However, if the fob has been dropped, exposed to water, or is several years old, a new battery may not be enough. Signs that the fob itself is failing include buttons that stick, a cracked case, or a fob that works only when held at certain angles.
Replacement fobs are available from Chrysler dealers, automotive locksmiths, and online retailers. Dealer fobs are typically more expensive but come programmed and ready to use. Third-party fobs are cheaper but may require programming by a locksmith or dealer before they will work with your vehicle. Ask the seller whether programming is included before you buy.
Frequently Asked Questions
How long does a Chrysler key fob battery last?
Most coin-cell batteries last three to four years with normal use. Heavy use—pressing the buttons many times per day—can shorten that to two years. If your fob stops working sooner, the battery may be defective, or the fob may have internal damage.
Can I use a different battery type if I cannot find the right one?
No. CR2032 and CR2025 are different thicknesses and voltages. Using the wrong type can damage the fob or cause it to malfunction. Stick with the type printed on your old battery or inside the fob case.
What should I do with the old battery?
Coin-cell batteries contain small amounts of lithium and should not go in the trash. Take the old battery to a pharmacy, electronics store, or hazardous waste facility that accepts batteries for recycling. Many retailers that sell batteries also accept old ones for free.
Do I need to reprogram my fob after changing the battery?
No. Changing the battery does not erase the fob's programming. It will work with your vehicle when ready after you close the case and test it.
Why is my new fob battery not working even though I installed it correctly?
The battery contacts inside the fob may be corroded or dirty. Open the fob, wipe the metal contacts with a clean, dry cloth, and reinstall the battery. If it still does not work, the fob's internal circuit may be damaged and the fob may need to be replaced.