This post may contain affiliate links. If you click one, I may earn a commission at no cost to you. As an Amazon Associate, I earn from qualifying purchases.

How to Change Ford F150 Key Fob Battery?

Key Takeaways:

  • Determine the correct battery type for your Ford F-150 key fob model (CR2025, CR2032, CR2450 common options).
  • Gather necessary tools – small flathead screwdriver or coin to open casing.
  • Locate small slot on side of fob, insert tool and twist gently to open.
  • Remove old battery, taking note of orientation.
  • Insert new battery in same orientation, aligning positive (+) and negative (-) marks.
  • Close casing, pressing firmly until it snaps shut completely.
  • Test fob to ensure it works properly after battery replacement.


Losing keyless entry functionality on your Ford F-150 can be inconvenient and frustrating. Often, replacing the small battery inside the key fob remote is all that’s needed to restore normal operation. This straightforward repair can be completed with minimal tools and effort.

This article will provide a step-by-step guide on how to change the battery in a Ford F-150 intelligent access key fob. We’ll cover determining the correct battery type, gathering the necessary tools, opening the fob casing, removing and replacing the battery, closing everything back up, and testing operation.

With these simple instructions, you can swap in a fresh battery and avoid the cost and hassle of dealer service or key fob replacement. This article contains everything you need to know to quickly restore your F-150’s keyless functions. Read on to learn how to complete this repair yourself and get back to unlocking and driving your truck with ease.

Step 1: Determine the Correct Battery Type

The first step is figuring out what type of replacement battery you need for your F-150 key fob remote. This can vary depending on the specific model year and trim level of your truck. The owner’s manual or an online search can provide the battery specifications.

Common options for Ford F-150 key fobs include:

  • CR2025 – Often used in older models (pre-2015)
  • CR2032 – Frequently found in newer key fobs
  • CR2450 – Larger battery seen in some configurations

Make sure you obtain the correct size battery before attempting the repair. Using the wrong type could damage the fob or fail to power it appropriately. Checking the markings on your original battery is also an easy way to identify the replacement needed. With the right battery in hand, you can move on to the next step.

Step 2: Gather the Necessary Tools

Replacing the battery in a Ford F-150 key fob requires minimal tools. The most important item needed is a way to open the fob casing to access the internal battery compartment.

You’ll need either:

  • Small flathead screwdriver – This allows you to pry open the casing by inserting it into a slot on the side.
  • Coin – In a pinch, you can use something like a dime or nickel to twist and pop the casing open.

In addition to the pry tool, it’s helpful to have:

  • Clean rag or towel – This cleans away any grime or debris first.
  • Tweezers or pliers – Makes removing the old battery easier.

With these basic tools on hand, you’re ready to open up the fob and continue the repair. Avoid using excessive force and pry gently to prevent damaging the plastic housing.

Step 3: Open the Key Fob Casing

Now it’s time to actually open up the fob remote. Look closely along the seam where the two casing halves meet. You should see a small slot, indentation, or groove on one side.

Carefully insert your flathead screwdriver or coin into this slot. A gentle twisting motion or slight prying pressure should release the catch allowing the two halves to separate. The casing should pop open to reveal the circuit board and battery compartment inside.

Be careful not to damage the internal components or plastic housing. Only apply minimal force when trying to release the catch. If you don’t see an obvious slot, consult your owner’s manual to locate the correct opening spot. With patience and care, you can access the battery without issue.

Step 4: Remove the Old Battery

Once inside the now-open key fob, you need to remove the depleted battery. You will see a small holder or bracket securing it in place. Don’t pull too hard as this bracket helps make contact with the battery terminals.

Use your screwdriver or tweezers/pliers to gently lift the battery out of its compartment. Make note of the orientation so you can insert the replacement properly later. Set the old battery aside once extracted.

You may find it helpful to use a clean rag to wipe away any grease or grime that has accumulated inside the fob casing or around the battery contacts. This allows for a clean installation of the fresh battery.

Step 5: Insert the New Battery

After removing the old battery, simply insert the new one into the same compartment orienting it the same way. Match the positive (+) and negative (-) markings on the battery with the corresponding terminals in the fob.

Press gently but firmly until the battery clicks fully into place in the bracket. You want to ensure it makes flush contact with the terminals to power the fob correctly. Avoid touching the battery contacts to prevent transferring oils from your skin.

If inserted properly, the new battery should slide easily into the compartment and hold snugly in the appropriate orientation. Take care not to bend or force the battery during this step.

Step 6: Close the Key Fob Casing

With the fresh battery installed in the proper position, you can reassemble the two halves of the plastic fob housing. Align the pieces evenly and press them together firmly until you hear an audible snap.

Check that the casing is completely closed all the way around with no gaps. This protects the internal circuit board and battery from dust and moisture. If the two halves do not join tightly, confirm nothing is obstructing them before trying again.

Proper closure is important for restoring water resistance and preventing future issues. Some fob designs may have small screws to reinforce the seal after closing. Refer to your owner’s manual if unsure.

Step 7: Test the Key Fob

The final step after swapping the battery is verifying normal operation of your Ford F-150 key fob remote.

Start by pressing the lock button to see if it successfully locks the doors. Try unlocking from close range and further away. Confirm the panic button sounds the horn. Finally, make sure you can remotely start the engine if your fob has that capability.

If all functions are restored, you’ve successfully replaced the battery! Enjoy hassle-free keyless entry once again. If issues persist, double check the battery orientation and contact closure. You may need to repeat the process or consult your dealer if problems continue.

Frequently Asked Questions About Changing a Ford F-150 Key Fob Battery

Still have some questions about replacing the battery in your Ford F-150 key fob remote? Here are answers to some commonly asked questions:

How often does the key fob battery need replacement?

Most Ford F-150 key fob batteries last 2-4 years with normal use before needing fresh batteries. Signs of a depleted battery include reduced range and intermittent operation.

Where can I buy a replacement battery?

The right CR2032, CR2025, or CR2450 batteries can be found in stores at retailers like Walmart, Target, hardware stores, supermarkets, drug stores, and auto parts outlets. Online purchases are also available.

How do I open the fob if there’s no visible slot or seam?

Consult your owner’s manual or an online tutorial for your specific F-150 model. Some fobs require prying in a recessed area or at certain points along the edge rather than a visible slot.

What if I put the battery in backwards?

Inserting the battery incorrectly can damage the fob circuitry in some cases. Follow orientation markings closely. If unsure, look up a wiring diagram for your fob to avoid polarity errors.

Can moisture damage the key fob over time?

Yes, moisture intrusion from a compromised casing seal can corrode the battery contacts and electronics. Ensure the housing is securely closed after battery changes.

Do I need to have the fob reprogrammed after battery replacement?

Fortunately, no. The fob should work normally once the battery is changed without any required reprogramming or coding at the dealership.

What if I lose both keys and fobs for my F-150?

You will need to contact a Ford dealer. They can erase and reprogram new fobs to work with your truck based on the VIN. This incurs additional service fees.

Is it possible to turn the fob off to save battery life?

Most Ford F-150 key fobs do not have an on/off switch. But you can extend battery life by keeping fobs away from heat sources and excessive button pushes when not in use.


Replacing the small internal battery is an easy and inexpensive way to restore function when your Ford F-150 key fob stops working properly. With the right CR-style replacement battery, a simple pry tool, and following the steps above, you can complete this repair yourself in minutes. Avoid the time and cost of dealer service by swapping in a fresh battery.

Key points to remember are verifying the correct battery type for your truck, opening the fob casing carefully, properly orienting the new battery, sealing the housing completely, and testing operation. With a bit of care and patience, you will once again have a fully functional keyless entry remote. Consult your owner’s manual or online guides if ever unsure of any step in the process.

About The Author

Scroll to Top