The procedure involves replacing the depleted power source within a remote control device used to operate functions on Subaru vehicles. This commonly entails accessing the interior of the device’s casing, removing the old component, and inserting a new one of the correct specification.
Maintaining a functional remote provides consistent access to vehicle locking and unlocking capabilities, as well as alarm system operation and, in some models, remote engine start. Neglecting this maintenance can lead to inconvenience and potential security vulnerabilities. Older models might require a more intricate disassembly process compared to newer, more modular designs.
This document will detail the necessary steps, including identifying required tools, accessing the device’s internal components, and ensuring proper battery installation for several common Subaru key fob designs.
1. Required Tools
Successful battery replacement in a Subaru remote control device mandates the use of specific tools to facilitate safe and effective disassembly and reassembly without causing damage to the device’s delicate internal components or exterior casing. The selection of appropriate instruments directly impacts the outcome of the procedure.
-
Small Flathead Screwdriver or Pry Tool
A small, thin flathead screwdriver or a specialized plastic pry tool is commonly required to separate the two halves of the remote’s casing. These tools are essential for accessing the battery compartment without marring or cracking the plastic housing. The size of the tool should be carefully matched to the seam of the remote to minimize the risk of damage. Examples include generic precision screwdrivers or purpose-built plastic opening tools available from electronics suppliers. Improper tool selection may result in permanent damage to the casing, rendering the remote unusable.
-
Phillips Head Screwdriver (Specific Models)
Certain Subaru remote designs incorporate small Phillips head screws to secure the casing. In these instances, a appropriately sized Phillips head screwdriver is indispensable. Using the wrong size screwdriver can strip the screw heads, making removal exceedingly difficult. The specific screwdriver size required depends on the remote model; therefore, it’s prudent to consult the vehicle’s owner’s manual or a reliable online resource to determine the appropriate size. Forcing the wrong screwdriver can also damage the screw threads, complicating future battery replacements.
-
Non-Marring Opening Tool
Alternatives to screwdrivers, such as plastic or nylon opening tools, prevent scratching or otherwise damaging the surface of the fob. These tools are designed to gently separate the housing components without leaving cosmetic marks. Examples include guitar picks or specialized spudgers. Employing non-marring tools helps preserve the appearance of the remote and maintain its resale value.
-
Clean Cloth or Work Surface
A clean, static-free cloth or work surface protects the remote’s internal components from dirt, dust, and static electricity during the battery replacement process. This preventative measure reduces the risk of contamination or damage to the electronic components. Such precautions are especially important in dry environments where static discharge is more prevalent.
The correct selection and application of these tools are critical in ensuring the successful exchange of the energy cell within a Subaru vehicles remote. Failure to employ the appropriate tools introduces unnecessary risks, potentially leading to damage and rendering the device inoperable.
2. Fob Disassembly
Successful battery replacement within a Subaru key fob fundamentally depends on proper disassembly of the device. Accessing the battery compartment necessitates a systematic approach to avoid damage to the casing or internal electronics. The method varies based on the fob’s design, requiring careful attention to detail.
-
Identifying the Opening Point
Many Subaru fobs feature a visible seam or a small slot designed as the point of entry for a prying tool. Examination of the fob’s perimeter is crucial to locate this entry point. Some models have a physical key that must be removed first, revealing the access point. Attempts to open the fob at the wrong location can result in structural damage to the casing. Specific models might include a release button or latch that must be manipulated to initiate the disassembly process. The absence of a designated opening point suggests a different disassembly method, requiring further investigation using the vehicle’s owner’s manual or other reliable sources.
-
Applying Correct Leverage
Once the opening point is identified, gentle and controlled leverage must be applied to separate the fob’s two halves. A small flathead screwdriver or a plastic pry tool is typically employed. Inserting the tool into the seam and carefully twisting or prying will gradually separate the casing. Excessive force should be avoided, as it can lead to cracking or breaking the plastic components. Moving the tool along the seam incrementally ensures even separation. If resistance is encountered, re-evaluating the tool’s position or checking for hidden screws or latches is advisable.
-
Managing Internal Components
Upon opening the fob, internal components such as the circuit board and battery are exposed. These components are often loosely held in place and can easily become dislodged. Exercise caution when handling the fob to prevent these parts from falling out or becoming damaged. The orientation of the battery and the circuit board should be noted before removal, as this information is crucial for proper reassembly. Avoid touching the electronic components directly, as static electricity or oils from the skin can cause damage. A clean, static-free work surface is recommended to protect these sensitive parts.
-
Removing Retaining Screws (If Applicable)
Some Subaru fob designs incorporate small Phillips head screws to secure the casing or the battery compartment. If screws are present, they must be removed before attempting to separate the fob. The correct size screwdriver is essential to prevent stripping the screw heads. After removal, the screws should be stored in a safe place to avoid loss. Failure to remove these screws will prevent the fob from opening and can lead to damage if force is applied. Checking for these screws is a critical step in the disassembly process for certain fob models.
The described facets demonstrate the criticality of careful disassembly as an indispensable preliminary step in the battery replacement procedure. Inadequate or improper execution of this task can potentially impair the subsequent stages and the overall effectiveness of the endeavor. Adherence to these guidelines guarantees the structural integrity of the remote.
3. Battery Type
The selection of the appropriate energy cell is a fundamental component of the task. Incompatibility can lead to malfunction or damage to the electronic device. Various Subaru remote control devices utilize specific battery types, typically coin cell batteries, such as CR2032 or CR2025. Substituting an incorrect type can result in a non-functional remote, or in extreme cases, damage to the fob’s internal circuitry. Utilizing a cell with a different voltage or chemical composition can impair the transmission signal, rendering the remote inoperable.
To ensure compatibility, identifying the correct battery type is paramount. This information can be found within the vehicle’s owner’s manual, printed on the original battery, or sometimes molded into the plastic casing of the remote. For example, if a remote originally contained a CR2032 battery, it should only be replaced with a CR2032. Using a CR2025, which is thinner, might result in intermittent contact or a complete failure to power the device. Failure to observe this detail renders the entire replacement procedure futile. Dealers or automotive parts suppliers can provide confirmation on the appropriate power cell given the vehicle year and model.
In summary, the choice of battery directly influences the success of a remote control device battery replacement. It is imperative to verify the correct type to guarantee proper functionality and avoid potential damage. The type serves as a cornerstone for effective remote upkeep.
4. Terminal Polarity
Correct battery installation within a Subaru remote control device necessitates strict adherence to terminal polarity. This refers to the correct orientation of the battery’s positive (+) and negative (-) terminals in relation to the corresponding markings inside the remote’s battery compartment. Failure to observe proper polarity can prevent the device from functioning and, in some instances, may damage its internal circuitry.
-
Identification of Polarity Markings
Subaru remote control devices typically feature clear markings within the battery compartment indicating the correct orientation of the battery. These markings often take the form of a “+” symbol to denote the positive terminal and a “-” symbol for the negative terminal. These symbols are either molded into the plastic or printed on a sticker. Before removing the old battery, noting the position of the positive and negative terminals relative to these markings is advisable. If the markings are unclear or absent, consulting the vehicle’s owner’s manual or online resources is recommended. Reversing the polarity, even momentarily, can prevent the remote from operating and could potentially harm the fob’s electronic components.
-
Consequences of Incorrect Polarity
Inserting the battery with reversed polarity creates an electrical circuit that flows in the opposite direction from what the remote’s circuitry is designed to handle. This can prevent the device from powering on, as the internal circuits are not designed to function with reversed current. In some instances, the reversed current can cause damage to the electronic components, potentially requiring replacement of the entire remote. Newer models may incorporate a protection circuit, but relying on this is not advisable. Always verifying and adhering to correct polarity is a critical step in the battery replacement process.
-
Physical Indicators of Correct Installation
Besides the “+” and “-” markings, the physical design of the battery compartment often provides clues regarding the correct battery orientation. Some compartments are shaped to accommodate the battery in only one direction. Additionally, the battery contacts within the compartment are often designed to make contact with the battery terminals only when oriented correctly. If the battery does not sit flush or requires excessive force to install, polarity should be rechecked. Never force the battery into the compartment, as this can damage the contacts or the battery itself.
-
Testing After Installation
After installing the battery, test the remote’s functionality immediately to confirm successful installation. Pressing any button on the remote should elicit a response from the vehicle, such as flashing lights or unlocking doors. If the remote fails to respond, the first step should be to double-check the battery polarity. Even if the remote appears to function initially, but exhibits erratic behavior later, incorrect polarity should be considered as a possible cause.
The implications of terminal polarity extend beyond simply ensuring the device functions. Adhering to the markings and physical indicators reduces the risk of damaging the remote’s internal circuitry and prolongs its lifespan. This basic, yet crucial, step is a fundamental aspect of maintaining the functionality of a Subaru vehicle’s remote control device, thereby mitigating inconvenience and potential security issues associated with a non-operational remote.
5. Correct Orientation
The proper placement of the energy cell within a Subaru vehicle remote is dictated by its intended ‘Correct Orientation.’ This consideration extends beyond simple insertion; it directly influences the remote’s ability to function and communicate with the vehicle’s systems. Failure to adhere to the prescribed placement negates the entire battery replacement endeavor.
-
Positive and Negative Alignment
The positive (+) and negative (-) terminals of the battery must align with the corresponding indicators within the fob’s housing. These indicators are often molded into the plastic or printed near the battery compartment. Reversing the alignment disrupts the electrical circuit, preventing the flow of power and rendering the fob inoperative. This alignment is not arbitrary; it is a fundamental requirement for the internal electronics to receive power.
-
Contact Point Engagement
The battery’s terminals must make firm and consistent contact with the metallic contact points inside the fob. Correct orientation ensures these points engage properly. If the battery is inserted backward or at an angle, the contacts may not align, resulting in intermittent or non-existent power delivery. The contact points are designed to mate specifically with the battery terminals when correctly oriented. Damage to these contacts during incorrect insertion can further complicate the process.
-
Secure Fit Within the Housing
The battery should sit securely and snugly within its designated compartment. Correct orientation typically ensures that the battery fits flush and is retained by the compartment’s design. If the battery is forced into the compartment with incorrect orientation, it may damage the retaining mechanism or the battery itself. A loose or improperly seated battery can cause intermittent operation as the vehicle is in motion, leading to unpredictable behavior.
-
Effect on Signal Transmission
Even if the remote appears to power on with incorrect orientation, it may not transmit the correct signal to the vehicle. The polarity of the battery influences the flow of electrons through the internal circuits, which are specifically designed to operate with a specific current direction. If the current flow is reversed, the fob may transmit an incorrect or garbled signal, preventing the vehicle from responding as intended. This misalignment has direct bearing on the operational capabilities of the keyless entry system.
These elements directly correlate with ensuring functionality after exchanging the battery. Incorrect orientation prevents operation. These combined facets highlight the inextricable link between battery orientation and overall remote performance, directly influencing the success of this procedure. Attention to these considerations reinforces long-term remote functionality.
6. Case Reassembly
Case reassembly represents the concluding step in the battery replacement process within a Subaru key fob, directly impacting the device’s structural integrity and operational reliability. A compromised reassembly compromises the functionality gained during component replacement. Failure to properly reassemble the casing can expose the internal electronics to environmental hazards, such as moisture and debris, potentially leading to corrosion and malfunction. The procedure necessitates meticulous alignment of the casing components, ensuring all latches, screws, or other securing mechanisms are correctly engaged. An example is the presence of rubber seals designed to protect against water intrusion; if the seals are pinched or misaligned during reassembly, their protective function is nullified.
Proper reassembly is crucial for maintaining the fob’s physical integrity. A loosely assembled casing can separate upon impact, potentially losing internal components or damaging the circuit board. The engagement of all securing mechanisms is essential. Furthermore, the tactile feedback of the buttons should be assessed after reassembly. If the buttons are stiff, jammed, or non-responsive, it is indicative of improper component alignment within the casing. Correction may be required to ensure unrestricted button operation.
In summary, meticulous case reassembly is not merely a cosmetic concern but an essential step in ensuring the long-term functionality and protection of a Subaru remote control device. Attention to detail during this final stage safeguards the investment in a new battery and prevents future operational issues. The importance of this phase should not be underestimated as its proper completion dictates the overall success.
7. Function Testing
Function testing serves as a critical validation step directly following battery replacement in a Subaru key fob. The procedure confirms the success of the replacement process and ensures the device is once again capable of performing its intended functions. This assessment moves beyond mere observation of power; it verifies the fob’s ability to communicate effectively with the vehicle’s systems. Examples include verifying the vehicle’s locks respond to the fob’s lock/unlock commands, confirming the panic alarm activates, and, if equipped, testing the remote start functionality. Absence of proper function indicates an issue stemming from incorrect battery installation, damage incurred during the replacement procedure, or component failure.
The practical application of function testing lies in proactively identifying and addressing potential issues before they become major inconveniences. Imagine completing a battery replacement only to discover, upon needing to unlock the vehicle remotely in a remote location, that the fob remains non-functional. Function testing immediately after the battery replacement mitigates this risk. The process also extends to testing all available functions, rather than assuming the functionality of some based on the operation of others. A malfunction in a specific feature might point to damage sustained to the circuit board during battery replacement.
In summary, function testing is not an optional addition but a mandatory component of battery replacement. The objective confirms successful device restoration. It is a critical step in addressing unforeseen complications during a critical repair job for a vehicle keyless remote control access.
8. Sealing Integrity
The preservation of a remote’s internal environment hinges on the maintenance of sealing integrity. Any compromise to this integrity can nullify the benefits of a new energy cell, introducing complications that may render the key fob inoperable.
-
Moisture Ingress Prevention
The primary function of sealing is to prevent moisture from entering the fob’s housing. Water or humidity can cause corrosion on the circuit board and battery contacts, leading to malfunction or complete failure. Many Subaru fobs utilize rubber gaskets or O-rings to create a watertight seal. If these seals are damaged, dislodged, or improperly seated during battery replacement, moisture can easily penetrate the casing. The consequences of moisture ingress can range from intermittent operation to permanent damage, negating the benefit of a battery change.
-
Dust and Debris Exclusion
Besides moisture, dust and other small particles can also degrade the performance of the fob. These contaminants can interfere with button operation, cause shorts in the circuitry, or accelerate wear on moving parts. A tight seal prevents these particles from entering, maintaining the cleanliness of the internal components. The seal ensures consistent and reliable operation of buttons and internal contacts. Without an effective barrier, dust accumulation may eventually render the fob unusable, regardless of a new energy cell.
-
Impact Resistance Enhancement
While not its primary purpose, a well-sealed case also contributes to the fob’s impact resistance. A tightly closed casing provides structural support, reducing the likelihood of internal components becoming dislodged or damaged during a drop or impact. The seal effectively reinforces the housing, reducing the chance of stress being transferred directly to the delicate circuit board and battery. A compromised seal diminishes the fob’s ability to withstand everyday wear and tear.
-
Long-Term Reliability
Ultimately, the sealing integrity of a Subaru key fob directly impacts its long-term reliability. A properly sealed fob is more likely to withstand the rigors of daily use, maintaining its functionality for an extended period. This reduces the frequency of battery replacements and the overall cost of ownership. Conversely, a compromised seal can lead to premature failure, requiring frequent repairs or replacement of the entire fob. This underscores the importance of carefully inspecting and maintaining the seal during battery replacement.
In conclusion, the facets of sealing integrity outlined above highlight its critical role in ensuring the successful outcome of a battery replacement. Addressing each point during reassembly contributes to operational reliability and long-term cost savings. Preserving the seal promotes dependable keyless entry.
9. Preventing Damage
Protecting the Subaru key fob from damage during battery replacement is paramount to maintaining its functionality and longevity. The process, while seemingly straightforward, involves several steps where mishandling or improper technique can lead to compromised components or complete failure of the device. Adherence to specific preventative measures minimizes these risks.
-
Appropriate Tool Selection
Employing the correct tools for opening the fob casing is crucial. Overly aggressive prying with a screwdriver, for example, can crack the plastic housing or damage internal components. Instead, specialized plastic opening tools or appropriately sized screwdrivers should be used. The application of improper tools often results in irreversible cosmetic damage and may compromise the fob’s structural integrity, hindering its ability to protect its electronics.
-
Careful Handling of Internal Components
Once the fob is open, the circuit board and battery are exposed. These components are sensitive to static electricity and physical shock. Handling them with clean, dry hands, and avoiding contact with metallic surfaces, minimizes the risk of damage. Dropping the circuit board or applying excessive force when removing the old battery can cause irreparable harm, negating the purpose of the battery replacement. Grounding oneself before handling can help dissipate static charge.
-
Correct Battery Insertion
Inserting the new battery with the correct polarity is essential. Forcing the battery in backward can damage the battery contacts or, in some cases, short-circuit the fob’s electronics. Before inserting the new battery, the “+” and “-” markings inside the battery compartment should be carefully observed. Incorrect insertion can cause the fob to malfunction or fail completely, requiring professional repair or replacement.
-
Proper Case Reassembly
When reassembling the fob, ensuring all components are properly aligned and that the casing snaps together securely is vital. Forcing the case closed can crack the plastic or damage internal components. If screws are used, they should be tightened just enough to secure the case without stripping the threads. A properly reassembled case protects the internal components from moisture and debris, extending the life of the fob.
These elements directly contribute to a successful battery replacement and preservation of the Subaru key fob’s function. Overlooking these preventative measures increases the risk of damaging the fob, leading to costly repairs or the need for a complete replacement. By exercising care and following these guidelines, the functionality of the device is more assured.
Frequently Asked Questions
The following addresses common inquiries regarding the process of exchanging power sources within Subaru vehicle remotes. These questions aim to clarify potential points of confusion and provide concise, fact-based answers.
Question 1: What is the correct battery type for a Subaru key fob?
The precise battery type varies depending on the specific Subaru model and the fob design. Most commonly, CR2032 or CR2025 coin cell batteries are utilized. The vehicle’s owner’s manual or markings within the fob’s battery compartment provide definitive identification. Utilizing the wrong battery type may result in improper function or damage.
Question 2: What tools are required to change the battery?
Typically, a small flathead screwdriver or plastic pry tool is necessary to open the fob casing. Certain models may require a Phillips head screwdriver to remove retaining screws. Employing non-marring tools minimizes the risk of cosmetic damage. The utilization of appropriate implements helps guarantee the success of the task.
Question 3: What happens if the battery is installed with reversed polarity?
Reversing the battery polarity can prevent the fob from operating. In some cases, it may damage the internal circuitry. Always confirm the correct “+” and “-” orientation before installing the battery to avoid potential complications.
Question 4: How often should the battery be replaced?
The frequency of battery replacement is dependent on usage patterns and environmental conditions. However, a typical lifespan ranges from one to three years. Diminished range or inconsistent operation are indicators that replacement is necessary.
Question 5: Is it necessary to reprogram the fob after replacing the battery?
In most Subaru models, reprogramming is not required after a simple battery replacement. The fob should retain its programming. However, if the fob fails to operate after the battery replacement, consulting the vehicle’s owner’s manual or a qualified technician is advisable.
Question 6: How to handle the old battery?
Old batteries must be disposed of responsibly. Many retailers that sell batteries offer recycling programs. Alternatively, local waste management authorities can provide guidance on proper disposal methods. Responsible disposal mitigates the risk of environmental contamination.
Understanding these points can facilitate a smooth and successful exchange. Consistent attention to these principles ensures device longevity.
The following sections address specific considerations for different Subaru models.
Expert Guidance
The subsequent advisory statements address critical aspects involved in the devices maintenance. Attention to these details is crucial for successful execution of the replacement procedure and preservation of the device’s functionality.
Tip 1: Consult the Owner’s Manual: Prior to commencing the battery replacement, the vehicle’s owner’s manual should be consulted. This document provides specific instructions and diagrams relevant to the particular Subaru model. The manual can assist in identifying the correct battery type and disassembly procedures, reducing the risk of damage.
Tip 2: Work on a Clean Surface: A clean, well-lit workspace is essential. A clean environment prevents contamination of the fob’s internal components. A lint-free cloth or a static-free mat provides a suitable surface, reducing the risk of electrostatic discharge.
Tip 3: Handle the Circuit Board with Care: The circuit board is delicate. Avoid touching the electronic components directly, as oils from the skin or static electricity can cause damage. Handling the board by its edges and using anti-static wrist straps are recommended precautions.
Tip 4: Note Battery Orientation: Prior to removing the old battery, carefully observe its orientation within the fob. Noting the position of the positive (+) and negative (-) terminals ensures correct placement of the replacement battery. A photograph can serve as a reference.
Tip 5: Test Immediately After Replacement: Following battery replacement and case reassembly, test the fob’s functionality immediately. Verify the vehicle’s locks, alarm, and remote start (if equipped) are functioning correctly. Immediate testing identifies issues requiring prompt attention.
Tip 6: Inspect the Case for Damage: Before and after battery replacement, inspect the fob’s casing for cracks, breaks, or other signs of damage. Damage to the case can compromise its ability to protect the internal components and may require replacement of the entire fob.
Tip 7: Use Quality Batteries: Choose batteries from reputable manufacturers. Inferior batteries may have a shorter lifespan or be more prone to leakage, damaging the fob’s internal components. A higher quality power cell can prolong battery operation.
Adhering to these advisory guidelines minimizes the risk of complications, promoting successful battery replacements. By consistently following this advice, it can improve the maintenance and operation of the keyless entry system.
The information in this section will prepare for potential complications.
Conclusion
This document has detailed the procedure “how to change the battery in a subaru key fob,” encompassing tool selection, fob disassembly, battery type verification, polarity observance, correct orientation, case reassembly, function testing, sealing integrity, and damage prevention. Attention to each element contributes to a successful outcome.
Competent execution of this task ensures continuous keyless entry system operation. Consistent adherence to these principles helps prolong fob lifespan and decrease the probability of functional impairment. Therefore, diligence in battery replacement is a vital component of vehicle maintenance.
