The battery in a 2019 Honda Passport key fob is a CR2032 coin-cell that you can replace at home by opening the fob, swapping in a new battery with the correct orientation, and snapping the shell back together.
This guide explains the steps, the tools you’ll need, and best practices to ensure you don’t damage the fob during the swap.
What you’ll need
Gather these supplies before you begin so you can complete the job smoothly.
- CR2032 3V coin-cell battery
- Small flat-head screwdriver or a non-metal pry tool (a coin can work in a pinch)
- Clean, lint-free cloth or your bare fingers to handle the battery
- Soft workspace to prevent scratches
Having the right battery and a gentle pry tool helps you swap the battery quickly without damaging the fob’s housing.
Step-by-step replacement
Follow these steps in order to safely replace the battery and reassemble the fob.
- Remove the mechanical key: On the back of the fob, slide the small latch and pull out the black emergency key.
- Open the fob shell: 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.
- Expose the battery: Lift or slide the existing battery out of its holder, noting its orientation.
- Insert the new battery: Place the CR2032 with the positive (+) side facing up (toward the top of the fob).
- Reassemble the halves: Snap the two halves back together, ensuring all edges align and the case clicks shut.
- Reinsert the mechanical key: Slide the key back into its slot until it locks in place.
- Test the fob: Press Lock, Unlock, and the Trunk button to confirm the battery swap worked.
- Dispose of the old battery properly: Take it to a battery recycling facility or store that accepts batteries.
If the fob does not respond after replacing the battery, re-check the battery orientation and ensure the case is fully closed. If it still fails, the fob may need reprogramming or replacement at a dealer.
Battery type and orientation details
The 2019 Honda Passport key fob uses a CR2032 coin-cell battery. When installing, align the battery with the positive side facing upward toward the top of the fob to ensure proper contact with the electrical terminals.
Testing and maintenance tips
After reassembly, test the fob from a short distance to confirm reliable operation. If you notice intermittent signals, clean the battery contacts lightly with a dry cloth and verify the case is securely snapped shut. Replacing the battery every 1-2 years in typical use can prevent performance issues.
Common issues and troubleshooting
Typical problems include the fob failing to unlock, the trunk button not responding, or the push-button start not recognizing the key. Double-check the battery orientation, reseat the halves, and ensure you’re using a fresh CR2032. If problems persist, consult a Honda service center for programming or replacement options.
Summary
Replacing your 2019 Honda Passport key fob battery is a straightforward at-home task. Use a fresh CR2032, open the fob carefully, insert the new battery with the correct orientation, and reseal the case. Test the fob to confirm full function and recycle the old battery properly. If issues linger, seek professional service.