The process of replacing the power source within a Subaru keyless entry remote is a routine maintenance task required to ensure the device’s continued functionality. The key fob, responsible for remotely locking, unlocking, and sometimes starting the vehicle, relies on a small battery to transmit signals. Diminished range or complete failure of the remote’s functions indicates the need for a battery replacement. For example, if the vehicle no longer responds when the lock or unlock button is pressed from a reasonable distance, the battery is likely depleted.
Maintaining a functional key fob is critical for convenient vehicle access and security. A working remote eliminates the need to manually unlock doors with a physical key, enhancing convenience. Furthermore, a functional remote ensures alarm systems are active, protecting the vehicle from potential theft. Historically, replacing these batteries was often handled by dealerships, incurring significant costs; however, with readily available information and basic tools, most owners can perform this task themselves.
The following details the necessary steps for completing this maintenance, including required materials, disassembly instructions, battery identification, replacement procedure, and verification of the remote’s operation after the battery is changed. Understanding these steps allows owners to maintain their vehicle’s remote entry system effectively and economically.
1. Battery type identification
Battery type identification is a foundational step when undertaking the task of changing a Subaru key fob battery. The functionality of the key fob is contingent upon utilizing the correct battery specification. Inserting an incompatible battery can lead to immediate malfunction or long-term damage to the fob’s internal circuitry. Different Subaru models, and even different production years within the same model, may utilize varying battery types. Therefore, identifying the existing battery’s specification, typically printed directly on the battery itself, is crucial before attempting a replacement. A common battery type is the CR2032, but variations exist; confirmation prevents compatibility issues and ensures proper operation after the procedure.
The practical significance of correctly identifying the battery type is demonstrable in several scenarios. Attempting to power a key fob designed for a 3V CR2032 battery with a 1.5V battery will invariably result in the fob failing to operate. Conversely, attempting to force a physically larger battery type into the fob’s battery compartment can damage the retaining clips or compromise the fob’s structural integrity. Furthermore, employing rechargeable batteries where disposable ones are required, or vice-versa, introduces potential for overcharging, leakage, or reduced lifespan. Correct identification, thus, is a preventative measure against these potential pitfalls.
In summary, accurate battery type identification is not merely a preliminary check but an essential prerequisite for a successful battery replacement. It dictates compatibility, ensures proper operation, and prevents potential damage to the Subaru key fob. Neglecting this step introduces a high probability of failure and can lead to unnecessary expenses associated with repairing or replacing the key fob itself. It forms the bedrock for effective and safe remote maintenance.
2. Disassembly procedure
The disassembly procedure is a critical stage in the process of replacing a Subaru key fob battery. Incorrect execution can result in damage to the fob’s internal components, rendering it inoperable. Proper adherence to the correct method ensures access to the battery compartment without compromising the integrity of the device.
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Tool Selection
The appropriate tool is essential for successful disassembly. Many Subaru key fobs require a small, flat-head screwdriver or a plastic pry tool. Utilizing excessive force or an improperly sized tool can scratch the casing, break plastic clips, or damage internal circuitry. The tool’s purpose is to gently separate the two halves of the fob casing without causing structural damage. Inappropriate tools can necessitate replacement of the entire fob, significantly increasing repair costs.
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Separation Technique
The method of separating the fob casing varies by model year and design. Some fobs feature a small slot along the seam where the tool is inserted to pry the casing apart. Other models require a twisting motion to disengage internal clips. Applying pressure at the wrong point or using excessive force can break these clips, preventing the fob from securely reassembling. Careful observation and a methodical approach are required for a successful separation.
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Internal Component Handling
Upon separating the casing, internal components, including the circuit board and battery, are exposed. These components are often delicate and sensitive to static electricity. Touching these components without proper grounding can damage the fob. It is crucial to handle the components with care, avoiding unnecessary contact and ensuring a static-free environment. Mishandling the internal components can lead to malfunction and require professional repair.
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Safety Considerations
Prior to commencing the disassembly, it is advisable to remove any metal jewelry or accessories that could potentially create a short circuit if they come into contact with the battery terminals or internal circuitry. Additionally, performing the disassembly on a clean, well-lit surface minimizes the risk of losing small components, such as screws or battery retaining clips. These safety precautions reduce the likelihood of damage or injury during the battery replacement process.
The success of changing a Subaru key fob battery hinges on the correct execution of the disassembly procedure. Careful tool selection, appropriate separation technique, and mindful handling of internal components are all essential elements. Failure to adhere to these guidelines can result in damage to the fob, rendering it unusable and necessitating costly repairs or replacement. The disassembly procedure is therefore a critical aspect of the entire battery replacement process, demanding attention to detail and a methodical approach.
3. Correct Polarity
The concept of correct polarity is paramount in the context of replacing a Subaru key fob battery. The battery’s orientation, defined by its positive (+) and negative (-) terminals, directly dictates whether the key fob will function after the replacement. Reversing the battery’s polarity can prevent the fob from operating and, in certain circumstances, cause damage to its internal circuitry.
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Battery Compartment Markings
Most Subaru key fobs feature clear markings within the battery compartment indicating the correct orientation. These markings usually consist of a ‘+’ symbol denoting the positive terminal and a ‘-‘ symbol indicating the negative terminal. Adherence to these markings is crucial. Failure to align the battery with these markings will prevent electrical current from flowing correctly, resulting in the fob’s inability to transmit signals.
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Directional Clip Mechanisms
Some key fob designs incorporate physical mechanisms that only allow the battery to be inserted in the correct orientation. These mechanisms may include a directional clip or a shaped battery compartment that prevents the battery from being seated correctly if the polarity is reversed. Attempting to force the battery into the compartment in the wrong orientation can damage these mechanisms, further complicating the battery replacement process.
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Circuit Board Sensitivity
The circuit board within a Subaru key fob is designed to operate with a specific polarity. Reversing the polarity can subject the circuit board to reverse voltage, potentially damaging sensitive electronic components. While some fobs may incorporate protection circuits to mitigate the effects of reversed polarity, relying on these safeguards is not recommended. Consistent adherence to the correct polarity during battery replacement is essential for preserving the integrity of the circuit board.
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Testing and Verification
Following battery insertion, verifying correct polarity before fully reassembling the key fob is advisable. A simple visual inspection can confirm that the battery aligns with the markings in the battery compartment. Attempting to operate the key fob prior to reassembly allows for immediate confirmation that the battery is correctly installed. Should the fob fail to operate, rechecking the polarity is the first step in troubleshooting the issue.
The nuances of correct polarity underscore its importance in the procedure. Understanding the visual cues, physical constraints, and potential consequences associated with incorrect battery orientation are key to a successful battery replacement. Proper attention to polarity ensures the Subaru key fob operates reliably after the battery is changed, preserving its functionality and preventing potential damage.
4. Proper tool selection
Proper tool selection is a foundational element within the process of changing a Subaru key fob battery. Utilizing the appropriate tools minimizes the risk of damage to the fob’s delicate components and ensures efficient execution of the battery replacement procedure.
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Casing Integrity
Employing a plastic pry tool or a small, flat-head screwdriver of suitable size is critical to prevent scratching or cracking the fob’s casing. Using an oversized or metallic tool can exert undue pressure on the plastic, leading to cosmetic damage or structural failure. For example, attempting to pry open a fob with a large screwdriver often results in visible scratches and potential weakening of the casing’s structural integrity, thus affecting its weather resistance.
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Internal Component Protection
Proper tools facilitate precise manipulation of the fob’s components, minimizing the risk of damage to the circuit board or battery terminals. The incorrect tool can slip and inadvertently damage these internal elements, rendering the fob inoperable. Consider a scenario where a user attempts to remove a battery retention clip with a tool that is too large; the clip could be bent or broken, requiring replacement or rendering the fob unusable.
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Screw and Fastener Management
Certain Subaru key fob models contain small screws or fasteners. Using a correctly sized screwdriver is essential for their removal and reinstallation. Stripping the screw head due to an ill-fitting screwdriver can complicate the process, potentially requiring specialized tools for removal or causing permanent damage to the fob housing. Improper screw management can lead to a loose or unstable fob assembly.
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Preventing Static Discharge
While less directly related to the tool itself, the material composition of the tool’s handle is a consideration. Non-conductive handles are preferable to minimize the risk of static discharge that could damage the fob’s electronic components. Although not always a primary concern, the use of tools with insulated grips contributes to overall safety during the battery replacement procedure.
In summary, the careful selection of tools contributes directly to the success and safety of changing a Subaru key fob battery. Employing appropriate tools minimizes the potential for physical damage, protects delicate internal components, and ensures the secure reassembly of the fob, preserving its functionality and longevity.
5. Secure reassembly
Secure reassembly represents a critical juncture in the process of changing a Subaru key fob battery, directly influencing the device’s long-term functionality and protection. A compromised reassembly can negate the benefits of a correctly installed battery, leading to premature failure and potential damage to internal components.
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Alignment of Casing Components
Proper alignment of the fob’s casing halves is essential for a secure seal. Misalignment can result in gaps that allow moisture and debris to enter, potentially corroding electronic components and shortening the battery’s lifespan. For example, if the casing is not fully snapped together, exposure to rain or humidity can lead to internal short circuits. This step ensures the physical integrity of the device.
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Retention of Internal Components
Secure reassembly involves ensuring that all internal components, such as the circuit board and battery retention clips, are properly positioned and secured. Failure to do so can result in these components shifting during use, leading to intermittent connectivity or complete failure of the fob. If a retention clip is not correctly engaged, the battery might lose contact, causing the fob to cease operation.
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Fastener Integrity (if applicable)
In key fob designs incorporating screws or fasteners, proper tightening is vital. Over-tightening can strip threads or crack the plastic casing, while under-tightening can result in a loose assembly. A loose assembly permits movement of internal components and compromise the casing’s integrity. Appropriate torque, if specified, should be observed to maintain structural stability.
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Verification of Closure
Following reassembly, a thorough inspection should be conducted to verify that the casing is fully closed and that no gaps or protrusions are evident. Applying gentle pressure around the perimeter of the fob can help confirm that all clips and fasteners are securely engaged. A poorly closed fob is vulnerable to environmental factors and physical stress, undermining its reliability.
The aforementioned facets collectively highlight the importance of secure reassembly in relation to changing a Subaru key fob battery. This stage is not merely a concluding step but an integral component that ensures the continued functionality, protection, and longevity of the device. Neglecting secure reassembly diminishes the value of the entire maintenance procedure.
6. Functionality verification
Functionality verification serves as the definitive validation of the procedure. Simply replacing the battery does not guarantee the key fob’s return to operational status. Establishing that the remote functions as intended after reassembly is a critical step in the maintenance process. This verification process assesses the successful completion of the battery replacement and confirms the continued operability of the fob’s various features. If the fob fails to perform its functions following a battery change, it indicates an issue with the battery installation, fob reassembly, or potentially a pre-existing problem unrelated to the battery itself. For example, if the vehicles doors do not unlock upon pressing the unlock button after a battery change, further troubleshooting is necessary.
The verification process involves testing all functions of the key fob. This includes, at a minimum, verifying the remote locking and unlocking of the vehicle’s doors. Depending on the fob’s capabilities, functionality verification should also extend to features such as remote start, panic alarm activation, and trunk release. Successfully testing each function ensures that the battery replacement has restored the fob to its full operational capacity. For instance, on a Subaru model with remote start, this feature’s activation should be confirmed post-battery replacement. Failure of any function warrants a re-evaluation of the battery installation and fob assembly. It also confirms that all required actions are met based on the instructions of “how to change subaru key fob battery”.
In conclusion, functionality verification is not merely an optional step but an integral component of the key fob battery replacement process. It acts as a quality control measure, confirming the success of the procedure and identifying potential issues. The ability to remotely lock and unlock the doors, activate the alarm, or start the vehicle depends on this verification. Without confirmation of proper function, the battery replacement remains incomplete, and the convenience and security offered by the key fob are not fully realized.
Frequently Asked Questions
The following addresses common inquiries and clarifies potential ambiguities related to replacing the battery within a Subaru key fob. The information aims to provide a clear and concise understanding of the process, potential issues, and best practices.
Question 1: Is specialized equipment required to change a Subaru key fob battery?
The replacement process typically requires minimal tools. A small, flat-head screwdriver or a plastic pry tool is generally sufficient for opening the fob casing. The correct replacement battery, often a CR2032 type, is also necessary.
Question 2: What is the risk of damaging the key fob during battery replacement?
Improper technique or use of excessive force can damage the fob’s casing or internal components. Adhering to the recommended disassembly procedure and using appropriate tools mitigates this risk.
Question 3: How can the correct battery type for a specific Subaru key fob be determined?
The battery type is usually printed on the existing battery within the key fob. Consulting the vehicle’s owner’s manual or contacting a Subaru dealership can also provide clarification.
Question 4: What actions should be taken if the key fob fails to function after the battery is replaced?
Ensure the battery is installed with the correct polarity. Verify that the battery terminals are clean and making proper contact. If the issue persists, the key fob may require reprogramming by a qualified technician.
Question 5: Is it necessary to reprogram the key fob after a battery replacement?
In most cases, battery replacement does not necessitate reprogramming. However, certain Subaru models or aftermarket key fobs may require reprogramming if the battery is depleted for an extended period.
Question 6: What are the symptoms indicating a need for key fob battery replacement?
Reduced operating range, inconsistent button response, or complete failure of the key fob to lock/unlock the vehicle are common indicators of a low battery.
In summary, replacing a Subaru key fob battery is a relatively straightforward process. Proper tool usage, correct battery identification, and careful reassembly are key to a successful outcome. Should difficulties arise, consulting the vehicle’s documentation or seeking professional assistance is recommended.
The subsequent section will address troubleshooting steps for common issues encountered during the battery replacement process.
Guidance for Subaru Key Fob Battery Exchange
The following recommendations are offered to enhance the efficiency and safety of the battery replacement process for Subaru key fobs.
Tip 1: Preparation is Paramount
Prior to commencing, gather all required materials, including the appropriate replacement battery (e.g., CR2032), a suitable tool for opening the fob (e.g., small flathead screwdriver or plastic pry tool), and a clean, well-lit work surface. This minimizes interruptions and potential loss of small components.
Tip 2: Gentle Disassembly Prevents Damage
Exercise caution when disassembling the fob casing. Avoid applying excessive force, which can fracture plastic components. Employ a gentle prying or twisting motion, following the manufacturer’s recommended procedure, if available. Review videos to determine the best approach on “how to change subaru key fob battery”.
Tip 3: Observe Battery Polarity
Note the battery’s polarity (positive and negative orientation) prior to removal. Most fobs have clear markings indicating the correct alignment. Incorrect installation can prevent the fob from functioning and, in some cases, damage internal circuitry.
Tip 4: Clean Battery Contacts
Prior to installing the new battery, inspect and clean the battery contacts within the fob. Use a clean, dry cloth or cotton swab to remove any corrosion or debris, ensuring optimal electrical contact.
Tip 5: Secure Reassembly Assures Longevity
Ensure the fob casing is fully and securely reassembled. Gaps or misalignment can allow moisture and debris to enter, potentially damaging the internal components. Confirm that all clips or fasteners are properly engaged.
Tip 6: Functional Testing Validates Success
After reassembly, thoroughly test all fob functions, including locking/unlocking doors, activating the alarm, and remote starting (if equipped). This verifies that the battery replacement was successful and that the fob is functioning correctly.
Tip 7: Document Battery Type for Future Reference
Retain a record of the battery type required for the specific Subaru key fob. This simplifies future battery replacements and eliminates the need to disassemble the fob to identify the battery specification.
Adherence to these guidelines increases the likelihood of a successful battery replacement and helps to maintain the functionality and longevity of the Subaru key fob.
The subsequent section offers supplementary information related to troubleshooting and potential complications.
Conclusion
The preceding examination of how to change subaru key fob battery has delineated the essential steps, potential challenges, and recommended practices involved in this routine maintenance task. Proper execution, including accurate battery identification, careful disassembly, adherence to polarity, appropriate tool selection, secure reassembly, and functionality verification, ensures the continued operability of the key fob and the associated vehicle features. Attention to detail and adherence to procedural guidelines are paramount in minimizing the risk of damage to the fob or its internal components.
While the battery replacement process is generally straightforward, a thorough understanding of the procedures and potential complications is crucial for a successful outcome. Vehicle owners are encouraged to exercise caution and consult relevant resources, such as the vehicle’s owner’s manual or qualified technicians, when encountering difficulties. Consistent maintenance of the key fob contributes to the vehicle’s overall security and convenience, underscoring the importance of proper battery replacement practices.
