Most Honda Accord key fobs use a CR2032 3-volt lithium coin cell. Some older models or alternate fob variants may use CR2025. To be sure, check the battery inside your fob or consult the owner's manual.
The exact size can vary by model year and trim, and the fob design itself influences the battery type. This guide explains how to identify the correct size and how to replace it safely.
Common battery sizes and how to confirm
The following covers the sizes you're most likely to encounter and the quickest ways to verify which battery your fob needs.
- CR2032 — 3V lithium coin cell: This is by far the most common size in recent Honda Accord key fobs.
- CR2025 — 3V lithium coin cell: Less common in newer models but may appear in some older or alternative fobs; check your fob if the CR2032 doesn’t seem to fit.
To confirm your exact size, inspect the current battery inside the fob, compare its diameter and thickness to known coin-cell sizes, or consult the owner's manual or a dealership for your specific model year and trim.
How to replace the battery safely
If you need to replace the battery, follow these steps to avoid damage to the fob and ensure proper seating of the new cell.
- Identify the correct size by checking the current battery or the owner's manual. If unsure, contact your dealership for confirmation.
- Purchase a fresh CR2032 (most common) or CR2025 if that size is indicated for your fob.
- Turn off the car and remove the key from the fob for safety.
- Gently pry apart the two halves of the fob at the seam using a small flat-head screwdriver or a plastic prying tool. Avoid sharp force to prevent damage to the housing or circuitry.
- Note the orientation of the battery (which side is facing up). Coin cells typically have the positive side facing up unless otherwise indicated.
- Carefully remove the old battery and dispose of it at a proper recycling point.
- Insert the new battery in the correct orientation, ensuring it sits flat and secure in the compartment.
- Reassemble the fob and press it shut until it clicks into place.
- Test the fob by pressing lock/unlock and confirming the car responds.
After replacing the battery, test the key fob’s range and responsiveness. If performance remains weak, the fob may need re-syncing with the car or further service.
Model-year notes and quick tips
Different fob shapes and names
The Honda Accord has used several key-fob designs over the years, from traditional remotes with a key blade to compact “smart key” styles. While the core battery type is a small coin cell, the exact size can vary by design. Newer smart-key fobs are typically powered by CR2032, but always verify for your specific model year and trim.
When in doubt, the quickest way to be sure is to check your vehicle’s owner’s manual or ask a dealership or automotive parts retailer. They can confirm the exact battery size for your exact model year and fob design.
Summary
The typical Honda Accord key fob uses a CR2032 3V lithium coin cell, with CR2025 appearing only in some older or alternative fob variants. To be certain, inspect the fob’s current battery, consult the owner’s manual, or contact a dealer. Replace with the correct size, ensure proper orientation, and test the fob’s function afterward.