Which Battery Fits a 2007 Honda Civic Key Fob?

Most factory 2007 Honda Civic key fobs use a CR1616 3‑volt lithium coin cell. That’s the standard size and voltage for the original remote integrated into the key head on 2006–2011 Civics. If your fob is an aftermarket replacement or a different style than the factory unit, it may use a different coin cell (occasionally CR2025 or CR2032), so a quick visual check is wise.

The Battery Spec at a Glance

The CR1616 is a 16 mm–diameter, 1.6 mm–thick, 3V lithium manganese dioxide coin cell. It’s thinner than the more common CR2032 and CR2025 cells, which is why it fits the compact Honda key head transmitter used in this model year.

How to Confirm Your Exact Battery

While CR1616 is correct for most original 2007 Civic fobs, there are easy ways to verify your specific remote’s requirement before you buy or install a replacement cell.

• Open the fob and read the marking on the existing coin cell; the code (e.g., “CR1616”) is printed on the battery itself.
• Check inside the fob’s battery compartment; many housings have the battery type molded or printed inside.
• Consult your owner’s manual under “Keys and Remote Transmitter.”
• Look up the FCC ID printed on the back of your fob through the manufacturer or reputable parts databases.
• If it’s an aftermarket fob, check the seller’s documentation or listing for the specified battery type.

Confirming in advance prevents fitment issues and ensures you don’t accidentally force a thicker coin cell into a housing designed for the thinner CR1616.

What You’ll Need

Replacing the battery is a quick DIY job requiring only a few basic items. Having the right tools on hand makes the process smoother and helps avoid damaging the case.

• 1x CR1616 3V lithium coin cell (quality brands like Panasonic, Energizer, or Duracell recommended)
• Small Phillips screwdriver (for the case screw) and/or a small flat-head screwdriver or coin to pry the case
• Soft cloth to protect the finish and a small tray to hold the screw
• Optional: isopropyl alcohol and a cotton swab to gently clean contacts

Using a name-brand CR1616 helps ensure stable voltage and longer life, especially in colder climates where lower-quality cells can sag quickly.

Step-by-Step Replacement Guide

The 2007 Civic’s factory fob is integrated into the key head. Opening it carefully and noting the battery’s orientation are the keys to a successful swap.

1. Locate and remove the small screw on the back of the key fob (near the key ring end), if present.
2. Gently pry the two halves of the key head apart at the notch using a coin or small flat-head screwdriver. Work slowly to avoid marring the plastic.
3. Note the battery orientation before removal (on most units, the positive “+” side faces up).
4. Lift out the old CR1616 and insert the new one with the same orientation, ensuring it seats flat under the retaining clips.
5. Snap the case halves back together evenly and reinstall the screw without overtightening.
6. Test the buttons near the vehicle to confirm lock/unlock and, if equipped, trunk and panic functions.

Simply changing the battery does not erase programming; the remote should work immediately. If it doesn’t, recheck battery orientation and contact seating before assuming a programming issue.

After Replacement: Programming Notes

Battery replacement alone does not require reprogramming on the 2007 Civic’s factory remote. If the transmitter still fails after a verified-good battery and clean contacts, the fob may be faulty or previously unpaired; in that case, dealer or locksmith assistance may be needed to reprogram or replace the transmitter.

Troubleshooting if It Still Doesn’t Work

If your remote is unresponsive after installing a new CR1616, these quick checks can help isolate the problem.

• Verify the battery is installed with the correct polarity and fully seated under the clips.
• Clean the battery contacts lightly with isopropyl alcohol to remove oils or corrosion.
• Try a second new battery in case the first cell is depleted or defective.
• Inspect the fob’s circuit board for damage from drops or moisture.
• Confirm the vehicle’s door lock fuses and central locking system are functioning.
• If using an aftermarket fob, consult the manufacturer’s pairing instructions.

Persistent issues usually point to a failing transmitter, worn buttons, or a pairing/programming problem rather than the coin cell itself.

Summary

A 2007 Honda Civic factory key fob takes a CR1616 3V lithium coin battery. While most original remotes use this size, verify your fob type by checking the old battery or markings inside the case. Replacement is a quick DIY job: open the key head, swap the cell with the same orientation, and reassemble—no reprogramming required in typical cases.

What size battery does a Honda Civic key fob take?

The most common Honda Civic key fob battery size is CR2032, a 3-volt lithium battery. However, older models, like the 2006-2013 Civic, may use a CR1616 or CR1620 battery, and some fobs might use other types, so it’s best to check your vehicle’s owner’s manual or the back of the old battery to confirm the exact size for your specific Honda Civic model.
 
This video shows how to change the battery in a Honda Civic key fob: 58sPYR Automotive YouTube · Mar 1, 2024
Steps to find the correct battery size:

1. 1. Check the battery itself: The battery type and size are printed on the flat surface of the old battery. 
2. 2. Consult your owner’s manual: Your vehicle’s owner’s manual contains detailed information about the key fob battery. 
3. 3. Confirm your Civic’s year: Different generations and models of the Honda Civic can use different battery sizes. 
   • Most modern Civics (e.g., 2008-2024): use the CR2032 battery. 
   • Older models (e.g., 2006-2013): may use CR1616 or CR1620 batteries. 

Once you confirm the size, you can purchase replacement batteries from automotive retailers or online marketplaces.

How to replace a 2007 Honda key fob battery?

Right there in the upper corner. There you can use a flathead that same flathead. And just kind of pivot it out just like that now go ahead and dispose of the old battery. Here pop the new one in.

What size battery for a 2007 Honda Civic key fob?

2 Pack CR1616 Original Key Fob Battery Replacement for Honda2005-2015 CR-V, Accord, Civic, Odyssey, Ridgeline 1992-2009 Compatible with Lexus ES300 GS300 GS400 GS430 GX470, ETC.

Do all Honda key fobs take the same battery?

Almost every Honda key uses the same three-volt battery.