The key fob for most 2007 Honda Accord models uses a CR2032 3-volt coin-cell battery.
Battery options commonly used for Honda key fobs
To help you prepare for replacement, here are the coin-cell sizes Honda has used in similar remotes.
- CR2032 — 3V coin cell, the standard choice for many Honda key fobs from this era.
- CR2025 — 3V coin cell, thinner; found in some variants or regional remotes.
- CR1616 — 3V coin cell, used in a minority of older remotes.
In practice, CR2032 is by far the most common for the 2007 Accord key fob. If your fob is not responding and you suspect a dead battery, check the one currently installed, and replace with the same size if possible; mismatching sizes can prevent contact and fit.
Replacing the battery in your Accord key fob
When it’s time to replace, follow these steps to swap in a fresh battery safely and ensure the fob continues to work.
- Identify the back cover retention method on your fob (screw or snap tabs) and open it carefully with a small flat tool or fingernail.
- Remove the old battery and dispose of it properly in accordance with local guidelines.
- Insert the new battery with the correct polarity. For most fobs, the positive (+) side faces up toward the buttons or the top of the fob.
- Snap the case back together and test all buttons to confirm the remote is functioning.
If the remote still doesn’t respond after replacement, the issue may lie with the circuit board or the immobilizer system, and you may need dealer assistance or a reprogramming service.
Extra tips for reliability
Keep spare batteries, store the fob away from extreme heat, and avoid touching the battery contacts with fingers, which can leave oils that interfere with performance.
Summary
For a 2007 Honda Accord, the typical key fob battery is a CR2032 3V coin cell. Verify with your actual fob, as a CR2025 or CR1616 may appear in some variants. Replacing is straightforward: open the fob, swap in the correct size with proper polarity, and test the remote. If problems persist, seek professional help.