The typical battery inside the 2009 Honda Fit key fob is a CR2032 3-volt lithium coin cell.
For most 2009 Fit remotes, this compact battery powers the lock, unlock and panic functions. Market-specific fobs or earlier revisions can vary, so if your fob looks different, verify the battery type before replacement.
Battery type and compatibility
Honda used a few different fob designs over the Fit's generation. The vast majority of 2009 models use the CR2032 coin cell. If your fob opened reveals a different size, or if you replaced a battery and the remote still doesn’t work, check the owner’s manual or the inside of the fob label to confirm the correct battery type.
Notes on variations
In rare cases, some markets or trim levels used a CR1616 cell. To avoid buying the wrong battery, inspect the existing battery or the fob's markings. If in doubt, take the fob to a Honda dealer or auto parts store for confirmation.
How to replace the battery
Below is a straightforward guide to replacing the battery in a typical 2009 Honda Fit key fob. Gather a small flat tool and a replacement battery, and work gently to avoid damaging the fob's electronics.
- Identify the seam where the two halves of the fob meet. You may need to slide a small flat-head screwdriver or a coin into the notch and twist gently to pop the case apart.
- Carefully separate the two halves to reveal the internal circuit board and the battery.
- Note the battery's orientation before removal. In most fobs the positive side faces upward toward the contacts.
- Remove the old battery (take care not to bend the contacts). Dispose of it properly.
- Insert a new CR2032 battery with the correct polarity, ensuring it sits flat on the contacts.
- Reconnect the two halves of the fob and snap the case back together firmly.
- Test the remote by pressing a button to confirm it unlocks/locks the doors from a short distance.
Once the new battery is in place, reassemble fully and test the fob at a typical range to confirm proper operation.
What if it still doesn’t work?
If replacing the battery doesn’t restore function, the issue could lie with the key fob’s circuit board, electronics, or the car’s receiver. In that case, consider programming or re-pairing the fob with the vehicle, or seek assistance from a Honda dealer or qualified automotive locksmith.
Summary
In brief, a 2009 Honda Fit key fob generally uses a CR2032 3V lithium coin cell. Replacing the battery is a simple DIY task with common tools: open the fob, swap in the new battery with correct polarity, reassemble, and test. If problems persist, consult a dealer or automotive locksmith for further help.