8. GMCELL CR2032 3V Lithium Battery, CR 2032 Button Cell Batteries

How Do I Change The Battery In My Subaru Key?

If your key fob battery is malfunctioning, it could be that the battery is dying. This means that replacement is the only option. To change the key fob, below is the process needed:

  • First, take off the physical key from the keyless entry, which can be done by pressing the small button at the back of the key fob. Next is to put the flat-bladed screwdriver into one side of the key fob’s slot. Then twist it a little to separate the two sides that reveal its contents.
  • Now take off the old battery using the screwdriver to pry out the dead battery. You can then put the new battery inside the same compartment you brought out the dead battery. Place the + sign side of the battery facing up.
  • Check the bottom where the battery compartment is placed before you close the two cases. This is to ensure there’s no dust or dirt left inside.
  • Then reattach both sides of the Key Fob together and put back the physical key. You can now test if it is functioning better by pressing the buttons as usual until you hear a beep for each one you press. Once your vehicle responds as it should, then you have successfully changed your Subaru key fob battery.

Steps For Replacing Subaru Key Fob Battery

As said before, replacing the Subaru key fob battery can be very easy. It only takes a few minutes to do, as long as you have the right tools and knowledge. To replace the key fob battery, below are the steps and tools needed:

Here are the Required Tools you will need when Replacing Subaru Key Fob Battery : 

  1. Screwdriver
  2. Tape
  3. Spudger (or butter knife)

You may want to read this article on the 10 Best Subaru Key Fob Battery Replacement options you can choose from.

Step 1: Take off the Mechanical Key

Before replacing the battery, you need first to remove the mechanical key. To do this, you will find a button at the back of the fob key, then use your thumb and press the button to remove the mechanical key.

But in case your thumb is too big and can’t enter the small groove that accommodates the button, then make use of a screwdriver to press the button.

When pressing the button with one hand, you can use the other hand to take off the mechanical key.

Step 2: Open the Housing

Next is to use the screwdriver to open the fob housing to reveal the control module. Before opening the housing, make sure to tape the tip of the screwdriver. 

This is to avoid damaging the control module. Once done, you should apply the screwdriver a little through the area where the mechanical key was removed to separate the housing into two.

Once the housing has been separated into two, you’ll discover that one side accommodates the control module while the other functions as the cover.

Step 3: Lift Out The Control Module

Once you successfully separate the housing, the control module that accommodates the battery will show. You will find it in one of the two housings. 

Take off the module carefully so that removing the battery will be easy.

I advise you to mark the housing that accommodates the control module before removing it so it won’t be difficult putting it back.

Step 4: Take off The Battery

There’s a metal contact that helps to hold the battery in place. This means you’ll use the spudger or butter knife so the battery can be free from the metal contacts. Ensure you do this step carefully so the control module won’t spoil.

Step 5: Insert the New Battery

It would be best if you bought the most used batteries for Subaru key fob replacement, which are CR2032 3V and CR2025 3V. However, there are other types of batteries to use. But make sure to check your car owner’s manual to know the perfect battery type for your fob.

Step 6: Put back the Control Module

Once you have inserted the new battery, return the control module to the housing. Return the module to the correct housing to enable closing the housing easier.

Remember that I advised marking the housing with the module earlier in step 3?

Step 7: Close the Housing

Is time to close the housing, which can be done by using the other housing to cover the housing that accommodates the control module. Just press one against the other.

Step 8: Return the Mechanical Key

Next is to return the mechanical key by inserting it into its usual place. To return it is much easier than the removal process.

Step 9: Test The Key Fob

It’s time to test your work which you can do by simply activating your car with it, and you are good to go. In case the fob doesn’t work after replacing the battery, you contact your mechanic. It could be that there is an underlying issue with your car.

Can You Replace Your Own Key Fob Battery?

Yes, you can replace your key fob battery, and it’s easier than you think. You only need a small new battery and a flat-tipped screwdriver. This might be intimidating, but replacing the battery is easy. 

The truth is that most key fobs will show the side that they come apart from. This means you can use a small tool, such as a screwdriver or a plier, to pry the pieces. 

Key fob batteries are small round batteries used for watches and small electronics. However, the exact type of battery to be used by your car will depend on the fob.

How Do You Change The Battery In A 2019 Subaru Key Fob?

Replace the battery in your 2019 Subaru key fob is straight forward. 2019 Subaru key fobs are sealed tight to help them stay durable and prevent water from getting into the electronics. Below are different types and shapes of key fobs used by 2019 Subaru, so I’ll show you how to replace a 2019 Subaru key fob battery.

Required tools:

  • CR2032 3V or CR2025 3V battery
  • Flat-head screwdriver

New Subaru Key Fob (Rectangle)

  • Buy a new 2032 battery.
  • Now open the key fob with the metal key or flathead screwdriver.
  • Check for the flat round battery inside the fob.
  • It would be best if you released the battery from the small tabs. Insert the new 2032 battery in the rightful place, exactly where the old battery was before.
  • Place the key fob back together.

Older Subaru Key Fob (Teardrop)

  • Buy a new 2025 battery.
  • Check for the small space in the seam separating the key fob’s front and back.
  • Pry the key fob open using the small flathead screwdriver.
  • Remove the old battery and insert the new 2025 battery back in. Just ensure you face the battery in the same direction as the old battery.
  • Put the key fob pieces back together.

Actual Subaru Key (Metal Key with Buttons)

  • Buy a new 2025 battery.
  • Check for the small space in the seam separating the key fob’s front and back.
  • Pry the key fob open using the small flathead screwdriver.
  • Remove the old battery.

How Much Does A Key Fob Battery Cost?

When your key fob battery becomes faulty, you’ll have to get it replaced. However, there are three most common and popular brands of key fob batteries that you can buy, which include Energizer, Duracell, and Panasonic. But how much does a key fob battery cost?

The cost of key fob batteries is about $10 or less, but some fobs require two batteries. Battery specialist shops and dealers may sometimes replace key fob batteries for free since it only takes a few minutes.

Do You Have To Reset Your Key Fob When You Change The Battery?

After changing your key fob battery, you don’t have to reset it again. This is because your key fob’s signal fin will remain the same even after replacement. So replacing the battery won’t affect how the fob works. 

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