Replacing a Dodge key fob battery takes about five minutes and costs between $5 and $15 for the battery itself
Most Dodge key fobs use a coin-cell battery—usually a CR2032 or CR2025—that you can buy at any pharmacy, grocery store, or hardware store. The battery sits behind a removable cover on the back of the fob. You do not need any tools, and you do not need to visit a dealer. If your fob stops responding to button presses, the battery is almost always the problem.
The exact steps depend slightly on whether your fob has a sliding cover, a snap-off back, or a slot you pry open. All three types are common across Dodge models. Once you know which type you have, the swap takes longer to read about than to do.
Key Takeaways
- Dodge key fobs use CR2032 or CR2025 coin-cell batteries that cost $5 to $15 and are sold at drugstores and supermarkets.
- Before you open the fob, check which cover style yours has: a sliding cover, a snap-off back, or a slot for prying.
- When you open the fob, note which side of the battery faces outward so you can install the new one the same way.
- If the fob still does not work after you install a fresh battery, the problem is likely inside the fob itself and you will need a replacement unit.
Identify your Dodge fob cover type before you start
Dodge has used three main designs over the years. Look at the back of your fob to see which one you have. The cover type tells you exactly how to open it.
Sliding cover: The back of the fob has a thin metal or plastic panel that slides up or down. You push it gently in one direction until it comes free, and the battery compartment is underneath. This is the easiest design to open.
Snap-off back: The entire back half of the fob is one piece that clips onto the front. You insert a coin or flat tool into the small slot along the edge and twist gently to pop the back off. The battery sits in a small tray inside.
Pry slot: A thin line runs around the edge of the fob where the two halves meet. You slide a coin or plastic pry tool into the slot and gently work your way around the edge until the back pops off. This design requires a bit more care to avoid cracking the plastic.
Remove the old battery and note its position
Once the cover is open, you will see a round, flat battery sitting in a small compartment. Before you touch it, look at which side is facing up—the side with the + symbol or the side that is blank. This matters because you must install the new battery the same way.
Gently pry the old battery out with your fingernail or a plastic tool. Do not use a metal tool that could scratch the contacts inside the fob. If the battery is stuck, a tiny bit of rubbing alcohol on the edge can help it slide out.
Once the battery is out, look inside the compartment. You should see two small metal contacts—one on the top and one on the bottom. If these contacts look corroded or dark, wipe them gently with a dry cloth or a cotton swab. Corrosion can prevent a new battery from making good contact.
Install the new battery with the correct side facing up
Take your new CR2032 or CR2025 battery and hold it so the + symbol faces the same direction as the old battery did. Slide it into the compartment and press gently until it sits flat. You should hear or feel a small click as it settles into place.
Do not force it. If the battery does not slide in smoothly, you may have it upside down. Flip it and try again. Once it is seated, the metal contacts should touch both the top and bottom of the battery.
Close the fob and test the buttons
Slide the cover back on, snap the back piece into place, or press the two halves together until they click. The fob should feel solid and not loose.
Press each button on the fob—lock, unlock, panic, trunk, or whatever buttons yours has. You should feel the button click under your finger. If your car is nearby, press the lock button and listen for the doors to lock. If you hear the locks engage, the battery is working.
If the buttons feel mushy or do not respond, the battery may not be making good contact with the metal contacts inside. Open the fob again, remove the battery, and check that the contacts are clean and that the battery is sitting flat. Reinstall it and test again.
What to do if a new battery does not fix the problem
If you have installed a fresh battery and the fob still does not work, the problem is inside the fob itself—usually a broken button contact, a cracked circuit board, or corrosion that a new battery cannot fix. At this point, you have two options: buy a replacement fob or visit a Dodge dealer.
Replacement fobs are sold online and at auto parts stores for $50 to $150 depending on the model year. Some come pre-programmed; others require you to program them yourself using a straightforward button sequence (your owner's manual or a quick online search will show you how). A dealer can also sell you a fob and program it, usually for $100 to $200 total.
Before you buy a new fob, confirm that your car's locks are actually responding to the fob. Stand next to the car, press the lock button, and watch the door locks move. If the locks do not move, the problem may be in the car's receiver, not the fob. In that case, a new fob will not help, and you should see a mechanic.
Where to buy the right battery
CR2032 and CR2025 batteries are standard coin cells sold everywhere. You can find them at CVS, Walgreens, Walmart, Target, Best Buy, Home Depot, Ace Hardware, and most grocery stores. They are usually in the pharmacy section or near the checkout counter. A single battery costs $3 to $8; a pack of two or four costs $5 to $15.
If you are not sure which size your fob uses, open the fob first and look at the battery itself. The size is printed on the top. Take a photo and show it to the store employee, or order online by model number. You can also call a Dodge dealer parts department and give them your vehicle identification number (VIN)—they will tell you the exact battery type.
Frequently Asked Questions
Can I use a different battery size if I cannot find a CR2032?
No. CR2032 and CR2025 are not interchangeable—they have different thicknesses and voltages. Using the wrong size can damage the fob or cause it to malfunction. If your store is out of stock, order online or try another store. The battery is inexpensive and widely available.
How often do I need to replace the battery?
A Dodge key fob battery typically lasts three to four years with normal use. If you use the fob heavily or leave it in a hot car, it may drain faster. Once you replace it, mark the date on your calendar so you remember to check it in a few years.
What if I cannot get the fob open?
If the cover is stuck or you are worried about breaking it, stop and take the fob to a Dodge dealer or a locksmith. They can open it without damage and replace the battery for you, usually for $20 to $50. It is worth the cost if you are uncomfortable prying it open yourself.
Will replacing the battery erase my fob's programming?
No. The battery powers the fob so it can send a signal to your car, but it does not store the programming code. Replacing the battery will not unpair the fob from your vehicle.
What should I do with the old battery?
Coin-cell batteries contain small amounts of lithium and should not go in the trash. Most pharmacies and retailers that sell batteries have a battery recycling bin near the checkout. You can also take old batteries to an electronics recycling center or a hazardous waste collection event in your area.