Subaru Key Fob Battery Size: Easy Replacement Guide & Programming Tips

For Subaru key fobs, use a 2032 lithium battery for newer rectangular designs, a 2025 lithium battery for older teardrop designs, and a 1620 lithium battery for the exposed-metal-key design. Check your key fob’s design to ensure you select the correct battery for proper function.

After replacing the battery, you may need to reprogram the key fob. Start by sitting in your Subaru with all doors closed. Insert the key into the ignition and turn it to the “On” position, then back to “Off” five times within ten seconds. After doing this, the locks should cycle, indicating that the vehicle is in programming mode. Follow your vehicle’s manual for further steps to program the fob to your specific model.

Understanding Subaru key fob battery size and replacement steps allows you to maintain your vehicle’s convenience. This knowledge prepares you for the next steps, such as troubleshooting issues with your key fob or learning about advanced programming techniques for added functionality.

What Size Battery Does a Subaru Key Fob Use?

The battery size for a Subaru key fob typically is CR2032.

1. Common Key Fob Battery Types:
   – CR2032
   – CR2025
   – CR1632

2. Important Considerations:
   – Compatibility with specific Subaru models
   – Battery life and replacement frequency
   – The ease of battery replacement

Understanding these different aspects can help ensure proper functioning of your Subaru key fob.

1. Common Key Fob Battery Types:
   The most common battery used in Subaru key fobs is the CR2032. This type of battery measures 20mm in diameter and 3.2mm in thickness. It provides a reliable power source for many electronic devices, including key fobs. Other battery types, like the CR2025 and CR1632, might also be found in key fobs for certain models. For instance, the CR2025 is slightly thinner than the 2032 variant, measuring 2.5mm in thickness. It’s crucial to check your specific model to confirm which battery it requires.

2. Important Considerations:
   When replacing a battery, ensure compatibility with your specific Subaru model. Different models may require different battery sizes. Battery life depends on usage, with many key fobs lasting between three to five years before needing replacement. The process of replacing the battery is generally simple and requires no special tools. Users can often use a small flathead screwdriver to open the fob. Regular checks on battery life can prevent unexpected issues with key fob functionality.

How Can You Identify the Correct Battery for Your Specific Subaru Model?

You can identify the correct battery for your specific Subaru model by checking the owner’s manual, noting the battery size, and confirming compatibility through a trusted retailer.

The following points will guide you through this process:

1. Owner’s Manual: Your owner’s manual contains detailed specifications for your vehicle, including the battery type needed. Look for the battery section, which will list the size and specifications clearly.

2. Battery Size: Batteries come in various sizes and types. Note the size such as Group 35, 24F, or others specified. The manual will typically be your most reliable source for this information.

3. Retailer Confirmation: Use trusted retailers or websites that specialize in automotive parts. Many offer battery lookup tools where you can enter your vehicle’s make, model, and year to find the correct battery.

4. Local Dealership: If you’re unsure, visiting a Subaru dealership provides expert advice. They can identify the right battery based on your vehicle’s VIN (Vehicle Identification Number).

5. Battery Specifications: Ensure the chosen battery meets the required specifications like Cold Cranking Amps (CCA) and reserve capacity. These factors affect the battery’s performance in different weather conditions.

Using these steps will help ensure you select the appropriate battery for your Subaru, maximizing performance and reliability.

What Tools Do You Need for Replacing a Subaru Key Fob Battery Safely?

To replace a Subaru key fob battery safely, you need basic tools, including a small flathead screwdriver, a replacement battery, and tweezers.

1. Basic Tools:
   – Small flathead screwdriver
   – Replacement battery (typically CR2032)
   – Tweezers
2. Optional Tools:
   – Needle-nose pliers
   – Safety glasses
3. Workspace:
   – Soft surface (to prevent damage)
   – Good lighting (to see small parts)

Having gathered the necessary tools, let’s explore each aspect that contributes to safely replacing a Subaru key fob battery.

1. Basic Tools:
   The term ‘basic tools’ refers to the essential items needed for the task at hand. In this case, a small flathead screwdriver is required to open the key fob casing, while tweezers help in handling small components without dropping them. A replacement battery, commonly a CR2032 type, is often used, as it is widely available and suitable for most Subaru key fobs. Using the right tools is crucial to avoid damaging the fob.

2. Optional Tools:
   While not necessary, optional tools can improve efficiency and safety during the battery replacement process. Needle-nose pliers may assist in gripping small parts tightly, while safety glasses protect your eyes from any potential debris when handling the key fob. These tools offer additional support, especially for those who may lack dexterity.

3. Workspace:
   The workspace plays a critical role in achieving a successful battery replacement. A soft surface, like a cloth, is recommended to prevent scratches on the key fob. Adequate lighting ensures visibility of small components, facilitating the entire process. A well-organized workspace enhances focus and reduces the chances of losing parts.

By understanding the tools and workspace needed for replacing a Subaru key fob battery, you can ensure a smooth, efficient, and safe experience.

What Are the Steps to Replace the Battery in Your Subaru Key Fob?

To replace the battery in your Subaru key fob, follow these straightforward steps. You will need a small flathead screwdriver and a new battery, typically a CR2032.

1. Open the key fob case.
2. Remove the old battery.
3. Insert the new battery.
4. Reassemble the key fob.
5. Test the key fob functionality.

These steps outline the basic procedure for battery replacement. However, it’s essential to consider that different Subaru models may have variations in their key fob designs and battery specifications.

1. Opening the Key Fob Case:
   Opening the key fob case involves using a small flathead screwdriver to gently pry apart the housing. Be cautious to avoid damaging any clips or internal components.

2. Removing the Old Battery:
   Removing the old battery requires carefully taking it out from its compartment without applying excessive force.

3. Inserting the New Battery:
   Inserting the new battery means ensuring the positive (+) side is facing up, aligning it correctly with the battery connector.

4. Reassembling the Key Fob:
   Reassembling the key fob involves snapping the two halves back together securely to ensure it remains closed.

5. Testing the Key Fob Functionality:
   Testing the key fob functionality is crucial. Press the buttons to verify that the lock and unlock functions work as intended.

Replacing your Subaru key fob battery is a simple process that requires minimal tools and effort. Following the instructions will help ensure your key fob operates effectively, providing you with convenience and security.

How Do You Program a Subaru Key Fob After Battery Replacement?

To program a Subaru key fob after a battery replacement, follow these steps to ensure proper functionality.

First, make sure you have the new battery installed correctly in the key fob. Then, follow these steps to program the key fob:

1. Enter the Vehicle: Sit in the driver’s seat and close all doors.
2. Insert the Key: Insert the key into the ignition and turn it to the ‘On’ position, but do not start the engine.
3. Press the Lock Button: Find the lock button on the key fob. Press and hold the ‘Lock’ button for approximately 5 seconds.
4. Turn Off the Ignition: Turn the key back to the ‘Off’ position. This action will complete the initial programming phase.
5. Test the Key Fob: Press the ‘Lock’ or ‘Unlock’ button on the fob to ensure it works properly.

These steps are typically effective for many Subaru models. However, programming procedures may vary slightly based on the model year. Refer to your vehicle’s owner manual for specific instructions. If the key fob is not functioning after following these steps, consider consulting a Subaru dealer or automotive locksmith for further assistance. Proper programming is crucial for successful remote access and functionality of your vehicle’s locking system.

What Common Issues Arise When Replacing a Subaru Key Fob Battery?

Replacing a Subaru key fob battery can lead to various common issues. These issues often arise from improper handling, incompatibility, or errors during the replacement process.

1. Difficulty opening the key fob case
2. Incorrect battery size or type used
3. Temporary malfunction of key fob buttons
4. Programming issues after battery replacement
5. Losing key fob components during the replacement

To effectively address these common issues, it is vital to explore each one in detail.

1. Difficulty Opening the Key Fob Case: Difficulty opening the key fob case occurs when the user lacks the proper tools or technique. Many Subaru key fobs feature a tight seal that requires a small flathead screwdriver or a similar tool to pry open carefully. If excessive force is used, it may damage the case or internal components.

2. Incorrect Battery Size or Type Used: Using the wrong battery size or type can render the key fob non-functional. Subaru key fobs mostly operate on CR2032 or CR2025 batteries, but it is crucial to check the specific battery type required for your model. The National Highway Traffic Safety Administration (NHTSA) emphasizes the importance of using the correct specifications as outlined in the vehicle manual.

3. Temporary Malfunction of Key Fob Buttons: A temporary malfunction can occur if the terminals are not properly aligned after battery replacement. Sometimes, the buttons may stick or fail to respond due to misalignment of components. Regular users recommend testing all keys immediately after the replacement process to ensure functionality before reassembling the fob completely.

4. Programming Issues After Battery Replacement: Some Subaru models may require reprogramming of the key fob after battery replacement. Users might experience programming issues if they do not follow the specific steps provided in the vehicle’s manual. A study by Consumer Reports (2022) shows that a significant percentage of error rates can be attributed to skipped programming steps during the replacement process.

5. Losing Key Fob Components During the Replacement: Losing small components such as springs or buttons while replacing the battery is a common concern. These parts are often delicate and easy to misplace due to their size. To mitigate this issue, it is advisable to conduct the replacement in a clutter-free environment and to place all removed components in a small container.

Addressing these issues effectively will ensure a smooth key fob battery replacement and restore proper functionality to your Subaru vehicle.

How Frequently Should You Replace Your Subaru Key Fob Battery?

You should replace your Subaru key fob battery every one to two years. Key fob batteries often last this long before they start to lose power. Several factors affect battery life, such as usage frequency and environmental conditions. If your key fob starts to function intermittently or you need to be closer to your vehicle for it to work, it is a good indication that the battery is low. Replacing the battery promptly helps ensure your key fob operates smoothly. Always check the specific type of battery for your model, as this can vary. Regularly monitoring the performance of your key fob aids in timely replacements.

What Best Practices Can Help Extend the Life of Your Subaru Key Fob Battery?

To extend the life of your Subaru key fob battery, you can implement several best practices.

1. Limit exposure to extreme temperatures
2. Keep the key fob away from metal objects
3. Avoid dropping or impacting the key fob
4. Turn off unnecessary functions when not in use
5. Replace batteries promptly when depleted

Implementing these practices can help maintain the battery’s performance and longevity.

1. Limit Exposure to Extreme Temperatures: Limiting exposure to extreme temperatures can significantly impact your key fob battery life. High heat can cause a battery to drain faster. On the other hand, extreme cold can interfere with the battery’s performance. Studies by the Electrification Coalition indicate that lithium batteries, commonly used in key fobs, can lose up to 35% of power at temperatures below freezing.

2. Keep the Key Fob Away from Metal Objects: Keeping your key fob away from metal objects prevents unnecessary battery drain. Metals can interfere with the signal between the key fob and the vehicle. A study by the University of Science and Technology highlighted that proximity to metal can cause a key fob to work harder, leading to faster battery depletion.

3. Avoid Dropping or Impacting the Key Fob: Dropping your key fob can physically damage the internal battery connections. This damage can lead to unexpected battery failure. According to a report by Battery University, even minor impacts can disrupt the internal structure of electronic devices, decreasing their lifespan.

4. Turn Off Unnecessary Functions When Not in Use: Some Subaru models have features that can be turned off when not in use. These functions can include remote start or panic buttons. Keeping these features inactive can prevent the battery from draining. Car and Driver mentioned that minimizing key fob usage when not necessary can greatly enhance battery longevity.

5. Replace Batteries Promptly When Depleted: Promptly replacing the battery when it is weak can prevent damage to the key fob’s electronic components. Leaving a dead battery in a key fob may lead to corrosion or leakage, which can further damage the device. General practice suggests replacing the battery every 3-4 years or as indicated by a diminished signal.

By following these best practices, you can enhance the lifespan of your Subaru key fob battery.

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