Most Kia key fobs use a 3-volt lithium coin battery, with CR2032 being the standard for the newer models and CR2025 appearing in some older or regional variants.
Kia’s remote controls vary by model year and market, so the exact battery can differ. This article explains the common battery types, how to identify the correct one for your fob, and how to replace it safely.
Common Battery Types Used in Kia Key Fobs
The vast majority of recent Kia key fobs rely on a single-cell, 3V lithium coin battery. The two sizes you’re most likely to encounter are CR2032 and CR2025.
- CR2032 — 3V lithium coin cell; the standard choice for most current Kia key fobs.
- CR2025 — 3V lithium coin cell; used in some older models or specific regional variants.
If you’re unsure which size your fob needs, check the owner’s manual, the label inside the key fob cover, or consult a Kia dealer for your exact model and year.
How to Identify the Correct Battery for Your Kia Key Fob
To avoid buying the wrong battery, confirm the size before purchasing. The most reliable method is to inspect the fob’s battery compartment after you open the case, or to check the vehicle’s documentation for the recommended battery type.
Where to look for the battery size
Open the back cover of the key fob carefully; some models print the size on the inside of the cover or on the battery itself once removed. If the size isn’t visible, refer to the owner’s manual or contact a dealer for your specific model and year.
Replacement Steps
Before you start, make sure you have the correct battery size and a small flat tool to open the fob. Follow these steps to replace the battery safely.
- Verify the correct battery size for your model (CR2032 or CR2025).
- Turn off the vehicle and remove any accessories to reduce the risk of accidental button presses.
- Use a small flat tool or a coin to gently pry apart the key fob’s two halves along the seam.
- Carefully remove the old battery, noting the orientation (positive side up in most fobs).
- Insert the new battery with the correct polarity, ensuring it sits flat and securely in the compartment.
- Snap the two halves of the fob back together and test the buttons to confirm the fob works (lock/unlock, trunk, panic as appropriate).
If the fob doesn’t respond after replacement, double-check the battery orientation, clean any corrosion, and try again. If problems persist, consult a Kia dealer or a qualified automotive locksmith for a diagnostic check or fob programming.
Summary
For most Kia key fobs, the battery is a 3V lithium coin cell, with CR2032 as the predominant choice in newer models and CR2025 appearing in older ones. Always verify the correct size by consulting the owner’s manual or the fob’s labeling, and follow careful replacement steps to ensure the remote continues to function properly.