How to Change Subaru Key Fob Battery: A Simple Guide for Easy Replacement

When your Subaru key fob starts acting up, it’s usually a sign that the battery needs replacing. Don’t worry, it’s a quick and easy process that you can do yourself. In this guide, we’ll walk you through the steps on how to change Subaru key fob battery, so you can get back to driving in no time.

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Tools and Materials

How to change subaru key fob battery

Replacing the battery in your Subaru key fob is a simple task that can be done with a few basic tools.Here’s what you’ll need:

Battery, How to change subaru key fob battery

  • A new CR2025 or CR2032 battery. These batteries are commonly used in key fobs and are available at most hardware stores and online retailers.


  • A small flathead screwdriver or a coin. You’ll use this to open the key fob.
  • A pair of tweezers or needle-nose pliers. These will help you remove the old battery and insert the new one.

Step-by-Step Guide

How to change subaru key fob battery

Replacing the battery in your Subaru key fob is a simple task that can be completed in a few minutes. Follow these step-by-step instructions to ensure a successful battery replacement.

Before you begin, gather the necessary tools and materials, including a new battery (CR2025 or CR2032), a small screwdriver, and a clean cloth.

Step 1: Open the Key Fob

Locate the small release button on the side of the key fob and press it. The key blade will pop out, allowing you to separate the two halves of the fob.

Step 2: Remove the Old Battery

Use a small screwdriver to gently pry open the battery compartment. Carefully remove the old battery and dispose of it properly.

Step 3: Insert the New Battery

Align the positive (+) side of the new battery with the positive terminal in the battery compartment. Gently press the battery into place, ensuring it is securely seated.

Step 4: Close the Battery Compartment

Snap the battery compartment cover back into place. Ensure it is securely closed to prevent the battery from falling out.

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Step 5: Test the Key Fob

Press any button on the key fob to test its functionality. If the fob is working properly, the lights will illuminate and the buttons will respond.

Battery Compatibility

Subaru key fobs require specific types of batteries to function properly. Understanding the compatibility of these batteries is crucial to ensure the smooth operation of the fob.

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The most common battery types used in Subaru key fobs are CR2025 and CR2032. These are coin-shaped lithium batteries that provide the necessary voltage and power to operate the fob’s electronic components.

CR2025 vs. CR2032

  • CR2025: This battery has a diameter of 20mm and a thickness of 2.5mm. It provides a voltage of 3V and a capacity of 165mAh.
  • CR2032: This battery has a diameter of 20mm and a thickness of 3.2mm. It provides a voltage of 3V and a capacity of 225mAh.

While both batteries have the same voltage, the CR2032 has a higher capacity, which means it can last longer. However, it is important to check the specific requirements of the Subaru model to determine the correct battery type.

Troubleshooting Common Issues

Replacing a Subaru key fob battery is typically straightforward, but certain issues may arise during the process. Here are some common problems and their troubleshooting tips:

One common issue is difficulty opening the key fob case. If you encounter this problem, apply gentle pressure to the release button or use a small flat-head screwdriver to pry it open. Avoid using excessive force, as it may damage the key fob.

Incorrect Battery Type

Ensure you use the correct battery type specified in your Subaru’s owner’s manual. Using an incorrect battery may result in improper functionality or damage to the key fob.

Battery Not Making Contact

Inspect the battery terminals and ensure they are clean and free of corrosion. If necessary, clean the terminals using a cotton swab dipped in rubbing alcohol. Ensure the battery is properly seated in the battery compartment, with the positive and negative terminals aligned correctly.

Key Fob Still Not Functioning

If the key fob still doesn’t work after replacing the battery, try resetting it. Consult your owner’s manual for specific reset instructions, as they may vary depending on the Subaru model.

Fob Programming Required

In some cases, replacing the battery may require reprogramming the key fob to work with your vehicle. This is typically necessary if the key fob has been out of range for an extended period or if the battery has been completely drained.

Safety Precautions

Handling batteries requires utmost caution to prevent potential hazards. It’s crucial to follow proper safety guidelines for safe handling, storage, and disposal of batteries.

Batteries contain hazardous materials that can cause severe injuries if not handled properly. Always wear protective gear like gloves and safety glasses when working with batteries.

Battery Handling

  • Never short-circuit batteries by connecting the positive and negative terminals.
  • Avoid exposing batteries to extreme temperatures, such as excessive heat or cold.
  • Never attempt to disassemble or modify batteries.

Battery Storage

  • Store batteries in a cool, dry place away from direct sunlight.
  • Keep batteries away from children and pets.
  • Always store batteries in their original packaging or a suitable battery storage case.

Battery Disposal

  • Never dispose of batteries in household trash.
  • Dispose of batteries at designated recycling centers or battery collection points.
  • Follow local regulations and guidelines for proper battery disposal.

Final Summary: How To Change Subaru Key Fob Battery

Replacing the battery in your Subaru key fob is a simple task that can be completed in just a few minutes. By following the steps Artikeld in this guide, you can ensure that your key fob is functioning properly and that you’re back on the road in no time.

FAQ Insights

How often should I change the battery in my Subaru key fob?

The battery in your Subaru key fob should be changed every 2-3 years, or sooner if you notice that the fob is not working properly.

What type of battery does my Subaru key fob use?

Most Subaru key fobs use a CR2025 battery.

Where can I buy a replacement battery for my Subaru key fob?

You can purchase a replacement battery for your Subaru key fob at most auto parts stores or online retailers.

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