In most 2016 Honda key fobs, the battery is a CR2032 3V coin cell. The replacement process is straightforward: open the fob, swap in a fresh battery, and reassemble, then test the remote to confirm it works.
What you’ll need
Before you begin, gather the right parts and tools to ensure the job goes smoothly.
- Replacement battery: CR2032, 3V coin cell (verify with your model if possible; some 2016 trims may use a different size).
- Small flathead screwdriver or a coin to pry open the fob.
- Clean, dry workspace and good lighting.
- Optional: soft cloth to prevent scratching the fob.
Having the correct battery on hand helps avoid delays, and a clean workspace reduces the risk of losing tiny components.
Steps to replace the battery
Follow these steps to safely replace the battery without damaging the fob.
- Flip the fob over and locate the seam along the back. Use a small flathead screwdriver or a coin to gently pry apart the two halves.
- Note the orientation of the current battery; in most Honda remotes, the positive (+) side faces up.
- Remove the old battery and dispose of it properly at a recycling point.
- Insert the new CR2032 battery into the compartment, ensuring it sits flush with the contacts and the correct polarity.
- Snap the back cover back on and reattach any screws or clips.
- Test the fob by pressing the lock and unlock buttons from a short distance to confirm it’s working.
Handle the components with care, avoid touching the battery’s metal contacts with your fingers, and ensure the cover is fully seated to prevent dust ingress.
Troubleshooting and reprogramming
If the remote doesn’t respond after replacement, try these steps before seeking help from a dealer.
- Double-check the battery orientation and seating to ensure proper contact.
- Test the buttons from different distances and angles to verify range.
- Some 2016 Honda models require a simple re-sync after battery replacement. If your vehicle has a traditional ignition, insert the physical key into the ignition, turn to ON, then OFF, and remove the key. With the ignition off, press and hold both the Lock and Unlock buttons on the fob for a few seconds to re-pair, then test again. For push-start models, the re-pairing procedure may differ; consult your owner’s manual for model-specific instructions.
If the fob still fails to operate after re-sync attempts, the issue may lie with the fob’s transponder or immobilizer circuits, and you may need a dealer reprogramming or a replacement fob. Always refer to your owner’s manual for instructions tailored to your model.
Special cases and tips
Many 2016 Honda fobs include a mechanical key blade hidden inside the fob. If the battery dies, you can still access the door with this key and may be able to start the car in some scenarios by following the vehicle’s manuals for emergency startup procedures.
Safety and maintenance
Store the fob away from magnets and extreme heat, and inspect the battery compartment for corrosion. If you notice any leakage or corrosion, stop using the fob and seek professional help to prevent damage to the circuit board.
Bottom line
Replacing the Honda key battery is a quick, low-cost maintenance task that most owners can perform at home with a CR2032 battery and a small tool. If you encounter persistent issues after replacement, contact a Honda dealer or qualified locksmith to verify the fob’s functionality.
Summary: This article provides a practical, step-by-step guide to replacing the 2016 Honda key battery, including identifying the correct battery, opening the fob, installing the new battery, testing the remote, and troubleshooting if issues arise. With the right battery and careful handling, most users can restore key fob functionality quickly and avoid a trip to the dealership.