Ford Key Fob Battery Replacement

Keeping your Ford Fusion key fob in perfect working order starts with choosing and installing not just a new battery but the right one. Keep reading my Ford key fob battery replacement guide to find out how!

Ford is the #1 car maker in the US and the top user of key fobs. Ford has been using key fobs to unlock its cars and trucks since at least its 1993 Ford Explorer model.

Your ford fusion key fob battery will likely fail after a few years of daily use. For the safety of your automobiles, replacing them immediately can make a significant difference.

However, changing a key fob battery in a Ford is all about the key or fob type. Different fobs were used for different models. While the same fob was often used for years in a row, your best bet is to check the individual model pages below or look at the table for the image of your key to find the most suitable battery you need to replace.

Continue reading this Ford key fob battery replacement guide to discover what batteries you need, where to buy them, and most importantly, how to replace them.

Ford key fobs

Most Popular Ford Models

How to change the batteries on the most popular Ford vehicle key fob remotes.

  • F-150 – The Most Popular Vehicle in the US. Find all models of key fob batteries.
  • Explorer – The original SUV that basically invented the category.
  • Mustang – Change every battery for your Ford Mustang key fobs.
  • Escape – Ford’s compact SUV crossover.
  • EcoSport
  • Edge
  • Expedition
  • F-250
  • F-350
  • Flex
  • Fusion
  • Focus
  • Taurus
  • Ranger
  • Five Hundred
  • Transit Van
  • Transit Connect
  • Freestyle
  • Bronco – The infamous 90’s SUV.
  • C-Max – Compact and cute.

Ford Key Fobs

Ford has made about 7 major key fobs over the years:

  • Square Fob (no key)
  • Rounded Key
  • Slim Smart Key
  • Rounded Rectangle Flip Key
  • Rounded Rectangle w/Internal Valet Key
  • Smart Key w/Pull Out Valet Key

PictureKeyYearsBuy Battery
Square Fob (no key, 3-button)1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001CR2032 Check on Amazon
Ford Square Fob (no key, 4-button) Battery Square Fob (no key, 4-button)2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010CR2032 Check on Amazon
Ford Rounded Key Battery Rounded Key2011, 2012, 2013CR2032 Check on Amazon
Ford Slim Smart Key Battery Slim Smart Key2013, 2014, 2015CR2032 Check on Amazon
Ford Rounded Rectangle Flip Key Battery Rounded Rectangle Flip Key2016, 2017CR2032 Check on Amazon
Ford Rounded Rectangle w/Internal Valet Key Battery Rounded Rectangle w/Internal Valet Key2016, 20172x CR2025 Check on Amazon
Ford Smart Key w/Pull Out Valet Key Battery
Smart Key w/Pull Out Valet Key2018+CR2450 Check on Amazon

How To Change Every Ford Key Battery (2002-2019)

  1. How To Change Square Key Fob Battery (2002 – 2010)

This ford key fob battery model’s pretty straightforward to change.

What you will need:

  • A small flathead screwdriver
  • A new CR2032 key fob battery
Final Image Ford Square Key

How to replace the battery in your Ford Square Key Fob

Total Time: 9 minutes

1. Separate cover using flathead screwdriver

Ford Square Key Separate cover using flathead screwdriver

Locate the key ring on the device (at the top) and insert your flathead screwdriver. Twist and wiggle it in to separate the cover into halves.

2. Remove old battery with tool

Ford Square Key Remove old battery with tool

You should see the old battery now. Now, gently lift it up to pop it out using the same tool.

3. Install new CR2032 battery facing down

Ford Square Key Install new CR2032 battery facing down

Replace the old battery with a new one with the positive side facing down.

4. Reassemble cover and finish

Ford Square Key Reassemble cover and finish

Put the cover back together and you’re done.

See what I meant by ‘pretty straightforward’?

  1. How To Change Rounded Key Fob Battery (2011 – 2015)

I have to admit that this one’s a bit tough to change but my guide has made the process simple for you.

What you will need:

  • Flat screwdriver
  • A new CR2032

Step 1

Start by separating the key fob. To do that, locate the corner on the upper end, insert your flathead screwdriver to pry it apart, and open it up. This may seem a bit difficult at first but it opens eventually.

Step 2

Once it’s opened, take off the back cover and set it aside (taking note of the little rubber part). Now you have access to the old CR2032 battery. Pop it out and replace it with a new battery. Ensure the negative side is facing up.

Step 3

Return the rubber part on the battery correctly and reseal the two parts of the key fob together.

Congrats! You’ve successfully changed your battery.

  1. How To Change Smart Key Fob Battery (2011 – 2015)

This is an easy key fob battery replacement as you will find out below.

What you will need:

  • A small Philips head screwdriver
  • A new CR2032 battery

Step 1

Find the little button on the back. Pull it back towards you and remove the internal key.

Step 2

Insert the key you removed in step 1 in the upper part of the back cover to separate the device so you can have access to the battery.

Step 3

Gently pop out the battery with your Philips head screwdriver and replace it with a new one. Slide the battery in while keeping the text/lettering facing down.

Step 4

Finally, put the cover back together and return the internal key. That’s all!

Now, test your new battery to ensure it’s working properly.

  1. How To Change Rounded Rectangular Flip Key Fob Battery (2002 – 2010)

What you will need:

  • A small Philps head screwdriver
  • A new CR2032 key fob battery

Step 1

Flip the internal key open. You should see two indentations on the side. Insert your Philips head screwdriver to pry it gently to loosen and open it up.

Step 2

Can you see the battery? Yes? Good. Now pop it out with the same tool.

Step 3

Next, slide in and install the new battery with the positive side facing you. Put the pieces back together including the internal key.

Voila! You’re done. Pretty easy, yes?

  1. How To Change Ford Smart Key Fob Battery

This one may seem a bit complicated but it’s quite easy if you follow my guide.

What you will need:

  • A Philips head screwdriver
  • 2 new CIZ 2025 batteries

Step 1

To open up the device, push in your Philips head screwdriver in the little slot on the side while you press down the button on the upper part with a flat screwdriver. Doing this makes it easy to separate the key fob. Continue to pry it open with the Philips head screwdriver until the cover comes apart. You should be looking at the internal key now.

Step 2

Can you notice that the internal key is housed in another compartment? To access the battery you first need to take this part out. To do that, insert your small flathead screwdriver in the small space at the bottom. Keep twisting it in until it opens up. If the flathead screwdriver doesn’t work, use a Philips head or a key instead.

Step 3

There are two CIZ 2025 batteries here separated by a white part. The first one is at the top (positive side facing down) while the second is under it (negative side facing down). Pop up the first battery with your screwdriver to see the second one underneath. Replace the batteries with new ones properly (following the format you met).

Step 4

Put the pieces back together ensuring they align up correctly.

Boom! Your new ford smart key is now perfectly installed.

  1. How To Change The Newest Smart Key Fob Battery

What you will need:

  • A flathead screwdriver
  • A new CR2450 battery

Step 1

Press the upper button to take out the internal key. This is pretty easy to do.

Step 2

To separate the device, insert the same internal key into the hole you removed it from, and work it in until the back cover pops up. Or till it loosens enough to easily open up with your fingers. You can as well use a flat screwdriver for this.

Step 3

You should have access to the battery now. Insert a flathead screwdriver at the left corner to remove the battery.

Step 4

Replace the battery with a new CR2450 with the positive side facing up.

Step 5

Slide the back cover on, click together, and return the internal key.

Great! You just changed the latest key fob battery like a pro. Now go ahead and verify that it’s working well by testing it out.

In this video, I change every single Ford key fob, so you’ll be able to see exactly how it is done:


How To Know When Itโ€™s Time To Replace Your Ford Key Fob Battery

Like most batteries, a key fob battery doesnโ€™t stop working overnight. There are early warning signs to look out for. These signs easily reveal that your battery is weak and needs replacement.

So what are these warning signs?ย 

  1. There are times when the lock and unlock buttons, trunk release button, remote start, or panic buttons do not work
  2. For your Ford Fusion to respond to its key fob you need to move closer to it than you used to before
  3. The message “No key detected” appears.
  4. When you use your key fob with the Panic alarm, you cannot consistently enjoy the benefits of your key fob, such as locating and securing your vehicle.

Black and Silver Ford Logo

Frequently Asked Questions – Ford Key Fob Battery Replacement

What is a key Ford fusion key fob battery?

For owners of Ford Fusion sedans, a Ford Fusion key fob battery powers the key fob and allows remote access to the engine start and keyless entry.

How do I change the battery in my Ford car key?

It all depends on what type of key or fob you have. Some ford car keys have very simple batteries to change. Others require some precision tools to pry open access to the battery. Most Ford key fobs use CR or “coin” 3v batteries. Watch our video or read the step-by-step guide above on how to change every single Ford key fob ever made to find out how to change yours.

Ford Keyless Entry Remote โ€” Bottom Line

With so many options out there, we know purchasing your new Ford fusion key may be daunting. The good thing is, this Ford Key Fob Battery Replacement guide gives you a solid introduction to the Ford key fobs available and the keyless remote feature so you can seamlessly find the right one for you.

The video and instructions on how to change each battery come in handy when there is a need to change your ford key fob battery.

Please, do consult your owner’s manual or instructions/manufacturer guide before you make an attempt at repairs.

Visit your dealership if you want convenience. If you want to get a ford fusion key fob battery at a better price, shop online through a reputable seller and do the programming yourself.