The 2021 Honda Passport key fob uses a CR2032 3-volt lithium coin cell. This small, widely available battery powers the remote’s locking, unlocking, and panic functions, and is easy to replace when needed. This article explains the correct battery type, how to replace it, and best practices for maintenance.
Battery type and compatibility
The Passport’s key fob relies on a CR2032 coin cell. This is the standard size for this generation of Honda remotes and is generally compatible across similar models. If you’re replacing, verify the size by inspecting the battery inside the fob; some older Honda models or different fob designs may use CR2025, but the Passport’s remote is designed for CR2032.
Why CR2032 is the standard choice
CR2032 batteries offer a practical balance of size and capacity for car remotes. Their 3-volt chemistry provides reliable performance for typical remote functions, and the battery is readily available at auto parts stores, electronics retailers, and supermarkets, reducing downtime when replacement is needed.
Replacing the battery
To replace the battery, follow these steps to ensure the fob is sealed and functioning properly.
- Remove the mechanical key blade if your fob has one; this exposes the seam where the two halves come apart.
- Gently pry apart the two halves with a small flathead screwdriver or a dedicated fob opening tool, working around the seam to avoid cracking.
- Take note of the battery orientation: the positive (+) side typically faces up toward the top of the fob in most designs.
- Remove the old CR2032 and dispose of it at a proper recycling facility.
- Install a new CR2032 with the + side facing up, ensuring it sits flush in the battery cavity.
- Reassemble the fob halves and reinsert the mechanical key blade if you removed it.
- Test the fob by pressing lock, unlock, and panic to confirm proper operation.
Replacing the battery correctly restores full function and helps avoid issues like intermittent response or reduced range. If problems persist, the fob may need reprogramming or dealer diagnostics.
Maintenance and disposal
Keep the fob clean and dry, store it away from extreme temperatures, and replace the battery roughly every few years depending on use. Recycle the spent CR2032 battery at a local recycling facility or retailer that accepts batteries.
Summary
The 2021 Honda Passport key fob uses a CR2032 3V lithium coin cell. Replacing it is straightforward: open the fob, swap in a new CR2032 with the correct orientation, reassemble, and test. Proper disposal and regular maintenance help ensure reliable performance.