How to Replace the Key Fob Battery in a Honda Civic Sedan

1. Remove the built-in key from the remote.
2. With the buttons facing down, pry the slot with the key grip to remove the upper half of the cover.
3. Pry the battery out at its edge with a flat-tip screwdriver.
4. Install the new battery with the correct polarity.

• Replace the battery if the indicator does not come on when the button is pressed.
• Battery type: CR2032.
• Wrap the key grip and screwdriver in cloth to avoid scratching the remote; keep batteries away from children.

Source: 2026 Honda Civic Sedan owner's manual, PDF page 651. Steps are summarized in our own words (AI-assisted, checked against the cited pages 2026-10-18). Other model years can differ; your manual has the final word.