The 2016 Honda Accord key fob typically uses a CR2032 coin-cell battery. To replace it, remove the mechanical key, open the fob shell, swap in a new CR2032 battery with the correct polarity, and snap the case back together. The process is quick and can be done at home with a few common tools.
Battery type and compatibility
The replacement battery is usually CR2032. Some early or regional variants might use a slightly different coin cell, so check the size by inspecting the existing battery or consulting the owner’s manual. If in doubt, bring the old battery to the store to confirm the correct size.
Verification tips
Before buying a new battery, confirm the exact battery size for your specific fob variant. If you have a spare fob, you can compare the battery side-by-side to ensure you purchase the right cell.
Tools and safety
Gather a small flat-head screwdriver or a non-metallic pry tool, a clean workspace, and a soft cloth to protect the fob’s surface. Work on a flat, stable area and handle the fob gently to avoid damaging the plastic shell or internal electronics. Wash and dry your hands to prevent oils from transferring to the battery contacts.
The steps that follow will guide you through removing the key, opening the fob, replacing the battery, and reassembling the unit.
- Remove the mechanical key blade: Slide the release tab and pull the key out of the fob.
- Open the fob case: Use a small flat-head screwdriver or a coin to gently pry apart the two halves along the seam. Work slowly to avoid cracking the plastic.
- Remove the old battery: Note the orientation (which side is facing up) and lift the battery out of its shallow holder.
- Insert the new battery: Place the CR2032 in the same orientation as the old one, ensuring it sits snugly in the compartment.
- Reassemble the fob: Align the halves and press them together until they snap back into place. Reinsert the mechanical key blade.
- Test the fob: Press Lock/Unlock to confirm the remote functions correctly from a short distance.
Once the fob is reassembled and functioning, store the old battery and recycle it at an appropriate facility or retailer that accepts used batteries.
After replacement: testing and care
If the remote still seems unresponsive after replacement, recheck the battery orientation and seating, and ensure no debris is trapped in the contact surfaces. If issues persist, the fob could have a faulty circuit or other internal damage, and a dealership or locksmith service may need to diagnose the unit.
Summary
Replacing the battery in a 2016 Honda Accord key fob is a straightforward DIY task. Use a CR2032 battery, remove the mechanical key, pry open the fob, replace the battery with the correct polarity, reassemble, and test. With careful handling, your key fob should work reliably again.