How to Replace Your Key Fob Battery: Jeep, Ram, Dodge, and Chrysler

ALM CDJR Perry Service & Maintenance

Most Jeep, Ram, Dodge, and Chrysler key fobs use a common coin-cell battery (often a CR2032) and can be changed at home in a few minutes. You pop open the fob, swap in the new battery, and snap it back together. If your fob still does not work after a fresh battery, the issue may be the fob itself or it may need reprogramming, and that is where we can help. Here is how to do it and what to watch for.

What battery does my key fob use?

Most Jeep, Ram, Dodge, and Chrysler fobs use a small, flat coin-cell battery, most commonly a CR2032, which is inexpensive and available at most stores. The exact battery is printed on the old one once you open the fob, so if you are unsure, check the battery you remove before buying a replacement. If you would rather not guess, our parts department can confirm the correct battery for your specific model and year.

How do you change a key fob battery?

The steps are similar across Jeep, Ram, Dodge, and Chrysler fobs:

• 1. Remove the emergency key: most fobs have a small release so you can slide out the metal emergency key blade.
• 2. Open the fob: use the slot where the key came out, or a small flat tool, to gently pry the two halves apart. Take care not to damage the seam.
• 3. Note the battery orientation: look at which side (positive or negative) faces up before you remove the old battery.
• 4. Swap the battery: pop out the old one and press in the new battery the same way it came out.
• 5. Snap it back together: close the two halves until they click, and reinsert the emergency key.

Test the fob afterward. In most cases, a fresh battery restores full function right away, with no reprogramming needed.

My key fob still does not work after a new battery. What now?

If a fresh battery does not fix it, a few things could be going on:

• The new battery is weak or installed backward, worth double-checking
• The fob buttons or internal contacts are worn out
• The fob needs to be reprogrammed to your vehicle
• The fob has physical or water damage and needs replacement

Reprogramming and replacement fobs are things our service and parts team handles regularly. If your fob is acting up even with a good battery, we can diagnose it, program a replacement if needed, and get you back to normal.

Should I replace the battery myself or have the dealer do it?

For a simple battery swap, doing it yourself is quick and inexpensive. Where the dealer is worth a visit is when the fob needs reprogramming, a replacement fob, or if you are not comfortable opening the fob and want it done without risking damage. If you are already coming in for service, we are happy to take care of the battery while you are here.

This article is general guidance. The correct battery and fob procedure can vary by model and year. For help with your specific vehicle, contact the ALM CDJR Perry parts and service team.