The 2019 Honda Accord key fob uses a 3-volt CR2032 coin battery.
In practice, this lithium coin cell powers functions like lock, unlock, trunk release, and remote start. This article explains the exact battery type, how to replace it safely, and how to confirm you’re using the correct size for your market and trim.
Battery type and compatibility
For the 2019 Accord, Honda generally specifies the CR2032 coin cell. The CR2032 is 20 mm in diameter and 3.0 V, a common size across many Honda key fobs of this generation. Some regional variants or older replacements could use a CR2025, which is slightly thinner. If you see the label CR2032 on the current battery, you should use another CR2032 for replacement.
Regional variations
In North America, the CR2032 is the standard for the 2019 Accord key fob. Users in other regions should consult the owner's manual or a dealer to confirm the exact battery size for their variant, because different markets can occasionally have variations.
Replacing the battery
Before you start, have a new CR2032 battery on hand and a small flat tool to open the fob. The replacement process is straightforward and does not require specialized tools for most users.
- Slide out and remove the mechanical key blade from the fob by pressing the release button and pulling the key out.
- Use a small flathead screwdriver or a plastic opening tool to carefully pry apart the two halves of the key fob until the seam separates.
- Take out the old battery and note its orientation (the "+" side is usually facing up when the fob sits flat).
- Insert the new CR2032 battery with the "+" side facing up, ensuring it sits flat and makes proper contact with the terminals.
- Reassemble the fob halves and reinsert the mechanical key blade.
- Test the key fob by locking/unlocking and, if supported by your model, testing remote start and trunk release.
- If the fob still doesn’t work after replacement, contact a Honda dealer or a locksmith for reprogramming or potential internal issues.
Note: Always handle the circuit board and internal components gently to avoid damage, and dispose of the old battery properly according to local regulations.
Care and troubleshooting tips
Keep spare CR2032 batteries on hand, store the fob away from extreme heat, and avoid exposing it to moisture. If you see corrosion or leakage, replace the fob or consult a professional.
Summary
The 2019 Honda Accord key fob uses a 3-volt CR2032 coin battery. Replacement steps are straightforward: remove the key blade, open the fob, swap in a new CR2032 with the correct orientation, reassemble, and test. While CR2032 is the standard in most regions, some markets may use CR2025, so check the current battery or owner’s manual if you’re unsure. Proper disposal of the old battery is essential.