What size battery is in a Ford key?
In most Ford key fobs, the battery is a CR2032 3-volt lithium coin cell. Some older or region-specific models may use CR2025 or CR1632, so it’s best to verify your particular key by inspecting the fob or checking the owner's manual.
Common battery sizes for Ford key fobs
The following sizes cover the vast majority of Ford remotes you’ll encounter. This guide helps you identify which coin cell your model uses and how to replace it.
- CR2032 — 3V lithium coin cell; the standard choice for most Ford key fobs from the 2010s onward.
- CR2025 — 3V coin cell used in some older or regional Ford remotes.
- CR1632 — 3V coin cell used in a few smaller remotes or older models.
- Note: Some Ford remotes use slightly different housings; always verify by inspecting the battery inside the back cover.
Knowing the exact size for your fob helps prevent buying the wrong battery and ensures a clean replacement.
How to identify your Ford key fob battery size
There are a few quick ways to confirm the correct battery size before you buy a replacement.
- Remove the mechanical key blade from the fob to expose the back cover.
- Carefully pry open the back cover with a small flat tool, taking care not to damage the plastic.
- Look at the battery itself or the imprint on the cover; it will indicate the size (for example, CR2032).
- If the size isn’t visible, measure the battery’s diameter with a caliper or ruler to distinguish between CR2032, CR2025, and CR1632.
- Refer to your owner’s manual or contact Ford support if you’re unsure about compatibility.
Once you’ve confirmed the size, you can proceed to replace it with the same type and correct polarity.
Battery replacement quick guide
Follow these steps for a safe and effective replacement. This list helps you perform a standard swap quickly and without damage to the fob.
- Purchase a fresh CR2032 (or the correct size for your fob) from a reputable retailer or auto parts store.
- With the fob face down, press the release button to drop out the mechanical key blade.
- Use a small flat tool to gently pry open the back cover where the seam is located.
- Remove the old battery, noting the orientation (positive side up or down as indicated by the existing battery or the cover’s marking).
- Insert the new battery with the correct orientation, ensuring it sits flat and contacts the spring terminals.
- Snap the back cover back on, reinsert the mechanical key blade, and test the fob by locking/unlocking your vehicle or using the panic button.
If the fob does not respond after replacement, re-check the orientation of the battery, reseat the cover, or consult a Ford dealer or locksmith for further assistance.
Model and regional variations
Battery sizes can vary by model year and market. Ford’s newer models generally standardized on CR2032, but some earlier or regional remotes may still use CR2025 or CR1632. Always verify by inspecting the existing battery or consulting official documentation for your vehicle.
Safety and disposal
Handle lithium batteries with care. Do not short the contacts. Dispose of old batteries at approved recycling centers or automotive parts stores that accept used batteries.
Summary: The Ford key fob most often uses a CR2032 3V lithium coin cell, with CR2025 or CR1632 appearing in some older or regional remotes. Verify your exact model before buying, and follow proper replacement steps to keep your key functioning reliably.
