Most 2019 model-year key fobs use a CR2032 3V coin-cell battery, though some models may use CR2025 or CR2016. Check your fob or the vehicle’s owner's manual to confirm the exact size.
What factors influence the battery size
The exact battery size depends on the fob’s internal design, number of buttons, and whether the device uses a replaceable coin cell. While CR2032 is by far the most common for newer models, some brands and variants still rely on CR2025 or CR2016.
Common battery sizes by major brands
Here is a practical reference for popular 2019-model year vehicles and their typical key fob batteries. If your specific model isn’t listed, inspect the existing battery or consult the manual for confirmation.
- Toyota/Lexus: CR2032 (some models may use CR2016 or CR2025 in certain variants)
- Honda/Acura: CR2032 (older or specialty fobs may use CR2025)
- Nissan/Infiniti: CR2032 (CR2025 appears on a few older variants)
- Ford/Lincoln: CR2032 (CR2025 is uncommon but possible on very old or specialty fobs)
- Chevrolet/GMC/Cadillac: CR2032
- Hyundai/Kia: CR2032 (some older fobs may use CR2025)
- Volkswagen/Audi/European makes: CR2032
Understanding the exact size for your car helps prevent wasted trips to the dealership. If your model isn’t listed above, check the battery code printed on the battery itself or refer to the owner’s manual for the correct specification.
How to verify the battery size on your fob
To confirm the correct size, remove the back cover of the fob and inspect the battery or look for a code printed on the battery. If you’re unsure, note the make, model, and year of your vehicle and consult the manual or a dealer.
Replacement steps
Prepare the right replacement battery and tools before starting to minimize handling of the fob.
Tools and supplies
What you’ll need to complete the replacement:
- Replacement battery of the correct size (commonly CR2032)
- Small flathead screwdriver or a coin for prying the case
- Soft cloth to protect the fob during disassembly
Having the correct tools and battery size handy reduces the risk of damage to the fob.
Once you’re ready to proceed, use these steps to replace the battery.
- Turn the fob face down and place it on a soft surface to avoid scratches.
- Carefully insert a small flathead screwdriver or coin into the seam and gently pry open the back cover.
- Remove the back cover to expose the battery; observe the battery’s orientation, with the plus (+) side typically facing up.
- Take out the old battery using a non-metallic tool if possible to minimize the risk of shorting the circuitry.
- Insert the new battery, ensuring it seats flat and the orientation is correct.
- Snap the back cover back into place and press firmly until it clicks. Test the fob by locking/unlocking doors or starting the vehicle as permitted.
With the battery replaced, test the fob’s range and responsiveness. If it still doesn’t work, the issue may lie with the fob’s electronics or the car’s receiver rather than the battery.
Tips and safety
Handle batteries carefully. Do not short terminals or expose batteries to high heat. If you’re unsure about the correct size or feel uncomfortable replacing the battery yourself, contact the dealership or a qualified locksmith for assistance.
Where to buy
Key-fob batteries are widely available at auto parts stores, big-box retailers, and electronics shops. Look for CR2032 (3V) coins; if your model uses a different size, be sure to grab that exact one.
Summary
For most 2019-model vehicles, the standard key fob battery is the CR2032 3V coin cell, though CR2025 or CR2016 can appear in some models. Confirm the exact size by inspecting the current battery or consulting the owner’s manual, then replace it using the steps above. If you share your car’s make and model, I can confirm the precise battery size for your fob.