The battery is a CR2032 3-volt coin cell.
The 2008 Honda Fit key fob generally uses a CR2032 coin cell, which is common for Honda remotes from that era. However, regional variations or different trims can occasionally use a different size, so it’s a good idea to verify by inspecting the fob or consulting the owner's manual or a dealer if you’re unsure.
Battery type and regional variations
Before you replace the battery, it helps to know which coin cell sizes are commonly used in Fits from this period. The following options cover typical scenarios you might encounter.
- CR2032 — the standard 3V coin cell used in most 2007–2009 Honda Fit remotes.
- CR2025 — a thinner coin cell that is sometimes used in slimmer fob designs or regional variants.
- CR1616 — a smaller size occasionally found in some compact remote formats, though far less common for this model.
Confirming the exact size before purchasing helps prevent returns and ensures your fob works reliably after replacement.
How to replace the battery
Follow these steps to safely replace the key fob battery and test the remote function.
- Gather a fresh CR2032 (or the sized battery you confirmed) and a small flathead screwdriver or coin for prying.
- Turn the fob over and locate the seam where the two halves meet; gently pry apart the case along the seam.
- Remove the old battery, noting its orientation (which side is facing up).
- Insert the new battery with the correct polarity, matching how the old one was seated.
- Snap the fob halves back together until they click securely shut.
- Test the remote by pressing a button from a short distance to confirm it locks/unlocks the doors (and trunk, if equipped).
If the remote still doesn’t work after replacement, there may be an issue with the fob’s electronics or a need for dealer reprogramming; contact a Honda dealer or a qualified automotive locksmith for assistance.
Tips for accuracy and safety
Be gentle when prying the fob apart to avoid damaging the plastic housing or internal electronics, and dispose of old batteries properly according to local regulations.
Summary
Bottom line: for a 2008 Honda Fit key fob, the typical battery is a CR2032 3V coin cell. Replacement involves opening the fob, swapping in the correct coin cell with the proper orientation, reassembling the case, and testing the remote. If you’re unsure about the exact size for your specific fob variant, check the owner’s manual or contact a Honda dealer or parts retailer for confirmation.