1 Easy Step to Change Subaru Key Battery

Imagine you are in a hurry to drive somewhere and suddenly realize your Subaru key is not working. You try pressing the buttons repeatedly, but nothing happens. The reason behind this might be a dead battery. Changing the battery in the Subaru key is a simple and straightforward task that can be done at home, saving you both time and money. In this article, we’ll provide step-by-step instructions on how to change a Subaru key battery, ensuring you’re back on the road in no time.

To begin, gather the necessary tools. You’ll need a small flathead screwdriver or a key fob battery replacement tool, a new CR2025 battery, and a soft cloth. Before you start, make sure to clean the key fob with a soft cloth to remove any dirt or debris. This will help prevent any damage to the key fob or the battery during the process.

Once you have everything ready, locate the small release button on the back of the key fob. Using the flathead screwdriver or the key fob battery replacement tool, carefully pry open the key fob. Be gentle and avoid using excessive force, as you don’t want to damage the key fob. Once the key fob is open, you’ll see the battery inside. Use your fingernail or a small pair of tweezers to gently remove the old battery and replace it with the new CR2025 battery, ensuring the positive (+) side of the battery is facing up. Finally, close the key fob and test it to make sure it’s working properly.

Identifying Your Subaru Key

Before you can change the battery in your Subaru key, you need to identify the type of key you have. There are three main types of Subaru keys:

Traditional key: This is the most common type of key, and it is typically made of metal. It has a series of ridges on one side, and it is inserted into the ignition cylinder to start the car.
Valet key: A valet key is a smaller, simplified version of a traditional key. It is typically used by valets when they park your car. Valet keys do not have the same ridges as traditional keys, and they cannot be used to start the car.
Keyless entry remote: A keyless entry remote is a small, handheld device that allows you to lock and unlock your car without using a key. It also has a panic button that can be used to sound the car’s horn in case of an emergency.

To determine which type of key you have, look at the shape and size of the key. Traditional keys are typically made of metal and have a series of ridges on one side. Valet keys are smaller and do not have any ridges. Keyless entry remotes are small, handheld devices that have buttons for locking and unlocking the car.

Additional Information

In addition to the three main types of Subaru keys, there are also a few less common types of keys. These include:

Flip key: A flip key is a key that folds in half. The key blade is hidden inside the key fob when it is folded.
Proximity key: A proximity key is a key that allows you to unlock and start your car without taking it out of your pocket or purse.
Smartphone key: A smartphone key is a key that allows you to use your smartphone to lock, unlock, and start your car.

If you are not sure which type of key you have, consult your Subaru owner’s manual.

Locating the Battery

Accessing the battery in a Subaru key can vary depending on the model and year of the vehicle. Here’s a detailed guide to help you locate the battery:

1. Remove the Key Fob

Depending on your Subaru model, you may need to remove the key fob from the ignition or press a button on the fob to release it.

2. Pry Open the Key Head

a. Flip Key: For flip keys, locate the small notch or button on the back of the key head. Press this and slide the key blade out.

b. Non-Flip Key: For non-flip keys, use a small flat-head screwdriver or pry tool to gently pry open the key head. Insert the tool into the seam along the edge of the head and carefully apply pressure.

3. Locate the Battery

Once the key head is open, you should see a small coin cell battery. It’s usually held in place by a small metal contact or a plastic retainer.

4. Note the Battery Type

The battery inside your Subaru key is typically a CR2025 or CR2032 coin cell battery. Check the battery to confirm the correct type before replacing it.


Battery Type	Size
CR2025	19.5mm x 5.0mm
CR2032	20.0mm x 3.2mm

Removing the Old Battery

To remove the old battery, you’ll need to:

1. Locate the Key Fob Battery Compartment

The battery compartment is typically located on the back or bottom of the key fob. Look for a small, coin-shaped cover with a slot or notch for inserting a flathead screwdriver or other thin object.

2. Open the Battery Compartment

Insert the flathead screwdriver or other tool into the slot and gently pry open the cover. The cover may be held in place by a small clip or latch. Once the cover is open, you should see the battery inside.

3. Remove the Old Battery

Use your fingers or a pair of tweezers to carefully remove the old battery from the compartment. Pay attention to the orientation of the battery and make sure to insert the new battery in the same direction.
Below is a table that provides additional tips for removing the old battery from different Subaru key fob models:

Subaru Key Fob Model	Additional Tips for Removing Old Battery
2015-2023 Impreza	Use a small flathead screwdriver or coin to gently pry open the battery compartment cover.
2016-2023 Crosstrek	Use a pointed object, such as a paperclip, to press the small button located next to the battery compartment cover.
2017-2023 Outback	Use your fingernail or a small flathead screwdriver to gently slide open the battery compartment cover.

Inserting the New Battery

To insert the new battery, follow these detailed steps:

Locate the small indentation at the back of the key fob. This is the release button for the battery compartment.
Use a small flat-head screwdriver or a fingernail to gently pry open the battery compartment.
Carefully remove the old battery from the compartment. Note the orientation of the battery, so you can install the new one correctly.
Take the new battery and align it with the positive (+) terminal facing up, as indicated in the battery compartment. Double-check the polarity to ensure it matches the old battery’s orientation.
Gently press the new battery into the compartment until it clicks into place securely.
Close the battery compartment by snapping it shut.

Battery Type	Subaru Models
CR2025	Impreza, Legacy, Outback, Forester, Tribeca, BRZ, WRX, STI
CR2032	Crosstrek, Ascent, Solterra

Testing the Key

To test the battery in your Subaru key, follow these steps:

Press any button on the key fob.
If the LED light on the key fob does not illuminate or flashes weakly, the battery needs to be replaced.
If the LED light illuminates brightly, the battery is still good.

Replacing the Battery

To replace the battery in your Subaru key, follow these steps:

Use a small screwdriver or flathead key to pry open the key fob.
Locate the battery and remove it from the key fob.
Replace the old battery with a new one of the same type.
Make sure the battery is installed correctly, with the positive (+) side facing up.
Close the key fob and test the key to make sure it is working properly.

Battery Type

Subaru keys use CR2032 batteries, which are commonly available at hardware stores, grocery stores, and online.

Tips

It is a good idea to replace the battery in your Subaru key every 2-3 years, even if it is still working.
If you are having trouble replacing the battery in your Subaru key, you can take it to a locksmith or dealership for assistance.

Troubleshooting Key Battery Issues

1. Check If the Key Battery Is Dead

Turn on the car. If the key fob no longer works, replace the key battery.

2. Clean the Battery Contacts

Use a cotton swab dipped in rubbing alcohol to clean the battery terminals.

3. Check for Corrosion

If the battery contacts are corroded, replace the battery and clean the terminals with a wire brush.

4. Reset the Key Fob

If the key fob still doesn’t work, reset it by removing the battery for 10 seconds and then reinserting it.

5. Replace the Key Fob

If none of the above steps resolve the issue, the key fob may be damaged. Replace the key fob.

6. Check the Remote Module

The remote module is responsible for transmitting the signal from the key fob to the car. If the module is faulty, the key fob will not work. To check the module, refer to the following table:

Symptom	Possible Cause
Key fob works only in close proximity to the car	Weak remote module signal
Key fob does not work at all	Faulty remote module

Precautions for Battery Handling

When changing the battery in your Subaru key, it is important to take some precautions to ensure your safety and the proper functioning of your key.

Avoid contact with skin and eyes: The chemicals in the battery can cause irritation if they come into contact with your skin or eyes.
Do not puncture the battery: Puncturing the battery can cause it to leak or explode.
Do not dispose of the battery in the trash: Batteries contain hazardous materials that should not be disposed of in the regular trash.
Do not use a damaged battery: If the battery is damaged, do not use it and replace it immediately.
Keep the battery out of reach of children: Batteries can be dangerous if they are swallowed by children.
Dispose of used batteries properly: Used batteries should be disposed of at a designated recycling center.
Follow the instructions in your owner’s manual: Your owner’s manual will provide specific instructions on how to change the battery in your Subaru key.

Recommended Battery Type

For Subaru keys, the recommended battery type is a CR2025 coin cell battery. This type of battery is commonly used in various electronic devices, including car remotes, watches, and calculators. CR2025 batteries provide a reliable and long-lasting power source for your Subaru key, ensuring its smooth operation.

Additional Considerations

9. Programming a New Key Fob

If you have a new key fob that needs to be programmed, you will need to take your Subaru to a dealership or authorized mechanic. The programming process can vary depending on the model year, so it’s best to consult your vehicle’s owner’s manual or contact a professional for guidance. Programming a new key fob typically involves connecting a diagnostic tool to the vehicle and following specific instructions. Once the key fob is programmed, it will be able to unlock, lock, and start your Subaru as intended.

Here are some additional tips to keep in mind when changing the battery in your Subaru key fob:

Use the correct type of battery. The battery type will be specified in your owner’s manual.
Replace the battery as soon as possible to avoid any issues with unlocking or starting your Subaru.
If you are having trouble changing the battery, consult your owner’s manual or contact a mechanic for assistance.
Keep a spare battery on hand in case the battery in your key fob dies while you are away from home.

Safety First

Before you begin, park your Subaru in a safe location and turn off the engine. If the battery is not changed correctly, it can cause damage to the key fob or the car’s electrical system.

Locate the Key Battery

Open the key fob and locate the small, round battery. It is usually held in place by a small plastic clip or screw.

Remove the Old Battery

Gently pry the battery out of its housing using a small screwdriver or your fingernail.

Clean the Battery Terminals

Use a cotton swab or a clean cloth to clean the battery terminals inside the key fob. This will ensure a good connection with the new battery.

Insert the New Battery

Place the new battery into the housing, making sure that the positive (+) side is facing up. Press the battery down gently until it snaps into place.

Secure the Key Battery

Replace the plastic clip or screw that holds the battery in place. Make sure that the battery is secure and will not move around inside the key fob.

Close the Key Fob

Snap the key fob closed and test it to make sure that it is working properly. If the key fob does not work, check to make sure that the battery is inserted correctly and that the terminals are clean.

Additional Tips

Tip
Use a new battery of the same type as the old one.
Change the battery every year or two, or as needed.
Keep the key fob away from extreme heat or cold.
If the key fob gets wet, dry it thoroughly before using it.
If you have any problems changing the battery, consult your Subaru dealer.

How to Change a Subaru Key Battery

Changing the battery in your Subaru key is a simple process that can be completed in a few minutes. Follow these steps to change the battery in your Subaru key:

Locate the small screw on the back of the key fob and remove it with a small screwdriver.
Carefully pry open the key fob.
Locate the battery and remove it from the key fob.
Insert the new battery into the key fob, making sure that the positive (+) and negative (-) terminals are aligned correctly.
Close the key fob and tighten the screw.

Your Subaru key should now be working properly. If you are still having problems, you can contact your local Subaru dealer for assistance.