The procedure for exchanging the power cell within a Subaru remote keyless entry device is a straightforward task that ensures continued functionality of the vehicle’s remote locking, unlocking, and alarm systems. This process typically involves accessing the internal components of the fob to remove the depleted battery and install a new one of the correct type.
Maintaining a functional key fob is essential for convenient vehicle access and security. A dead or dying battery can render the remote features useless, requiring manual unlocking and potentially causing alarm system malfunctions. Understanding the replacement steps mitigates potential inconveniences and eliminates the need for professional assistance, resulting in cost savings.
The following sections will detail the tools required, the step-by-step instructions for opening the key fob, removing the old battery, inserting the new battery, and reassembling the device, ensuring seamless operation of the Subaru’s remote features.
1. Tools Required
The successful execution of a battery replacement within a Subaru key fob is contingent upon the availability and correct application of specific tools. These implements facilitate the safe disassembly, battery extraction, and reassembly of the device without causing damage to its delicate internal components. The absence of appropriate tools can lead to compromised functionality or irreparable harm to the key fob.
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Small Flathead Screwdriver or Pry Tool
This tool serves as a lever to carefully separate the two halves of the key fob casing. The precision of a small flathead screwdriver, or a purpose-designed plastic pry tool, minimizes the risk of scratching or breaking the plastic housing. Attempting to force the casing open without a suitable tool can result in cosmetic or structural damage.
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Small Phillips Head Screwdriver (Potentially)
Some Subaru key fob designs incorporate a small screw that secures the casing or battery compartment. A appropriately sized Phillips head screwdriver will be necessary to remove and subsequently reinstall this screw. Using the wrong size screwdriver can strip the screw head, making removal difficult.
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Non-metallic Spudger or Pick
A non-metallic spudger, plastic opening tool or pick can aid in gently dislodging the battery from its housing. The material’s non-conductive nature prevents short circuits during the removal process. Metal tools are discouraged, as they can damage the battery contacts or internal circuitry.
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Clean, Soft Cloth
A clean, soft cloth provides a surface to work on, preventing scratches to the key fob during disassembly and reassembly. It can also be used to wipe away any fingerprints or debris from the battery contacts or internal components, ensuring a clean and secure connection.
The judicious selection and application of these implements are critical to preventing damage and ensuring the continued functionality of the Subaru key fob after the battery exchange. Proper handling and awareness of tool function are therefore integral to the entire replacement procedure.
2. Fob Opening
Access to the battery compartment within a Subaru key fob is a prerequisite for replacing the depleted power source. The method of accessing this compartment varies according to the specific model and design of the fob. Incorrect execution of the opening procedure can result in damage to the device, rendering it unusable.
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Physical Key Removal (if applicable)
Many Subaru key fobs incorporate a physical key that slides into the fob body. Removing this key is often the initial step in gaining access to the battery compartment. A small release button or lever may need to be depressed to disengage the key. Failure to remove the physical key may impede the opening process or damage the fob.
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Casing Separation
The majority of Subaru key fobs consist of two plastic casing halves that are joined together. These halves are typically secured by small plastic clips. Employing a small flathead screwdriver or plastic pry tool inserted into the seam between the two halves allows for gentle separation. Applying excessive force or utilizing improper tools can break the clips, compromising the integrity of the fob.
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Screw Removal (if applicable)
Some fob designs incorporate a small screw, often located on the back of the device, that secures the casing halves. Identifying and removing this screw prior to attempting to pry open the casing is essential. Forcing the casing without removing the screw will likely result in damage to the plastic housing.
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Internal Component Awareness
During the opening procedure, care must be taken to avoid damaging the internal components of the key fob, such as the circuit board or battery contacts. These components are sensitive and can be easily damaged by static electricity or physical force. A methodical and cautious approach is crucial to prevent irreversible damage.
The proper execution of the fob opening procedure is a critical step in the battery replacement process. Adherence to these guidelines minimizes the risk of damage and ensures continued functionality of the Subaru key fob following the battery exchange. Recognizing the unique design of a specific fob before attempting disassembly is paramount.
3. Battery Type
The selection of the correct battery type is intrinsically linked to the successful execution of a Subaru key fob battery replacement. The key fob’s electronic circuitry is designed to operate within a specific voltage range and current capacity provided by a particular battery chemistry and physical size. Installing an incorrect battery type can lead to a non-functional fob, potential damage to the internal circuitry, or reduced battery life. For example, if a CR2032 battery is specified but a CR2025 (same diameter but thinner) is installed, the fob may not receive adequate power due to poor contact, rendering it inoperable. Similarly, substituting a battery with a different voltage can overstress or damage the electronic components.
Real-world examples illustrate the practical significance of using the correct battery type. Owners who inadvertently install a wrong battery often report issues such as intermittent fob operation, reduced range, or rapid battery depletion. Conversely, using the manufacturer-recommended battery type ensures optimal performance, extending the lifespan of the replacement and maintaining the reliability of the remote locking, unlocking, and alarm functionalities. Subaru typically specifies either a CR2025 or CR2032 3V lithium coin cell battery; consulting the owner’s manual or the markings inside the fob itself is essential to determine the precise specification.
In summary, the battery type is a critical and non-interchangeable element in the process of battery replacement. Identifying and installing the correct battery is a prerequisite for ensuring the key fob’s continued functionality, preventing potential damage, and maximizing the lifespan of the replacement. Disregarding this detail compromises the entire replacement effort and necessitates potential troubleshooting or even replacement of the entire fob.
4. Polarity Alignment
Polarity alignment represents a critical element within the procedure of exchanging the battery in a Subaru key fob. The battery, as a direct current (DC) power source, possesses a positive (+) and a negative (-) terminal. Proper functionality of the key fob’s electronic circuitry is contingent upon correct orientation of the battery within its designated compartment. Reversing the polarity can inhibit operation or, in certain instances, induce damage to the internal components. A real-world scenario involves a user inserting the battery with the positive terminal facing the incorrect contact; the fob will fail to transmit signals for locking, unlocking, or activating the alarm. This demonstrates the direct cause-and-effect relationship between polarity and operational status.
The significance of polarity alignment is further underscored by the design of the battery compartment itself. Often, the compartment features molded plastic indicators or markings indicating the correct orientation of the battery. These visual cues are intended to minimize the risk of incorrect insertion. Furthermore, the battery contacts are typically shaped to interface specifically with the designated terminal of the battery. For example, a spring-loaded contact may be designed to connect with the positive terminal, while a flat contact interfaces with the negative terminal. This physical design reinforces the importance of aligning the battery according to the intended polarity. Cases have been reported where forcing a battery into a compartment with reversed polarity can damage the contacts or the plastic housing.
In summary, the concept of polarity alignment is not merely a procedural step but a fundamental requirement for the successful operation of a Subaru key fob after a battery replacement. Correct alignment ensures the flow of electrical current in the intended direction, enabling the remote locking, unlocking, and alarm functions. Failure to heed polarity markings and designs can lead to operational failure or damage, underscoring the practical significance of understanding and adhering to this requirement. This understanding should be prioritized before and during the execution of the battery replacement procedure.
5. Proper Closure
Proper closure of a Subaru key fob after battery replacement represents a critical factor in ensuring the device’s continued functionality and protection from environmental elements. Incomplete or incorrect reassembly directly impacts the integrity of the internal components, potentially leading to malfunction or damage. The process dictates that the casing halves are securely rejoined, aligning precisely to re-establish the fob’s original structural form. For units secured with screws, tightening to the correct torque is crucial. Under-tightening may result in loose assembly and ingress of contaminants, while over-tightening can damage the plastic housing or strip the screw threads. Instances of improper closure can lead to intermittent operational issues or complete failure, necessitating subsequent troubleshooting and possible repair.
Furthermore, the closure process affects the key fob’s resistance to moisture and dust. An improperly closed fob is susceptible to intrusion by these contaminants, potentially corroding the battery contacts or damaging the internal circuitry. This is particularly relevant in geographical regions with high humidity or dust levels. Certain Subaru key fob designs incorporate a rubber gasket or seal to enhance water resistance; ensuring the gasket is correctly seated and undamaged during reassembly is paramount to maintaining this protection. Real-world cases document the failure of key fobs due to water damage stemming from inadequate closure after a battery exchange.
In summary, proper closure is not merely a cosmetic detail but a functional necessity integral to the overall battery replacement procedure. It safeguards the fob’s internal components, maintains its structural integrity, and ensures resistance to environmental contaminants. Neglecting this step compromises the entire process and may result in operational issues, reduced lifespan, or complete failure of the Subaru key fob. Adherence to the correct closure procedure is vital for long-term device reliability and functionality.
6. Functionality Test
A functionality test forms an indispensable component of the Subaru key fob battery replacement procedure. This test serves as the definitive validation that the battery replacement process has been executed correctly and that the key fob is operating as intended. The absence of a functionality test leaves the user uncertain about the success of the operation and potentially vulnerable to security or access-related issues. If, for example, the key fob fails to lock the vehicle remotely after battery replacement, the vehicle remains susceptible to unauthorized entry. The functionality test, therefore, mitigates potential risks associated with uncertain operation.
The functionality test typically involves verifying the key fob’s ability to perform its primary functions: remote locking, remote unlocking, panic alarm activation, and, if equipped, remote start. Each function should be tested individually to ensure proper operation. Observed anomalies, such as intermittent response or complete failure of one or more functions, indicate a potential issue with the battery installation, battery type, or the key fob’s internal circuitry. Such issues require immediate attention and may necessitate re-inspection of the battery placement or professional diagnosis. Examples exist where users, assuming a successful battery replacement, later discover the panic alarm is non-functional, posing a safety concern in emergency situations.
In conclusion, the functionality test is not merely an optional step but a critical validation element in the battery replacement process. It provides immediate feedback on the success of the replacement, ensures the reliable operation of key vehicle functions, and mitigates potential security risks. The consistent and thorough execution of the functionality test is paramount to ensuring the Subaru key fob is functioning as designed following a battery exchange, contributing to the overall safety and convenience of vehicle operation.
Frequently Asked Questions
This section addresses common inquiries and concerns pertaining to the procedure for exchanging the battery within a Subaru key fob. The information provided aims to clarify uncertainties and facilitate a successful battery replacement.
Question 1: What tools are absolutely necessary for replacing the battery in a Subaru key fob?
A small flathead screwdriver or plastic pry tool is generally required to open the key fob casing. A Phillips head screwdriver may be necessary for fobs secured with screws. A non-metallic spudger aids in battery removal. A soft cloth is recommended to protect surfaces.
Question 2: How does one determine the correct battery type for the Subaru key fob?
The battery type is typically indicated within the key fob itself, either on the battery compartment or within the casing. The vehicle owner’s manual may also provide this information. Common battery types include CR2025 and CR2032.
Question 3: What precautions should be taken to avoid damaging the key fob during the battery replacement procedure?
Gentle application of force when opening the casing is critical. Avoid using excessive pressure or sharp metal tools that could scratch or break the plastic. Ensure correct alignment during reassembly and avoid over-tightening any screws.
Question 4: What are the potential consequences of installing the battery with incorrect polarity?
Reversing the battery polarity can prevent the key fob from functioning. In some cases, it may also damage the internal circuitry. Always align the battery according to the markings within the battery compartment.
Question 5: How can one confirm that the battery replacement procedure has been successful?
After replacing the battery, test all key fob functions, including remote locking, unlocking, panic alarm activation, and remote start (if equipped). Failure of any function indicates a potential issue with the battery installation or fob functionality.
Question 6: Is it necessary to reprogram the key fob after replacing the battery?
In most cases, reprogramming is not required after a simple battery replacement. The key fob should resume normal operation immediately after the new battery is installed. However, consult the vehicle’s owner manual for model-specific information.
The information presented provides a fundamental understanding of the key fob battery replacement process. Adherence to these guidelines should facilitate a successful and trouble-free battery exchange.
The subsequent section provides troubleshooting steps for common issues encountered during and after the battery replacement process.
Essential Tips
These guidelines promote a smooth and successful battery replacement process within a Subaru key fob, minimizing potential complications and ensuring continued device functionality.
Tip 1: Identify the Specific Key Fob Model. Different Subaru models employ key fobs with varying designs. Consulting the vehicle’s owner’s manual or visually inspecting the fob ensures correct disassembly procedures are followed.
Tip 2: Prioritize a Clean Workspace. A clean, well-lit surface prevents loss of small components and minimizes the risk of contamination affecting battery contacts. Static-free mats can protect sensitive electronic components.
Tip 3: Employ Correct Tools. Using appropriately sized screwdrivers and plastic pry tools minimizes the risk of damaging the fob’s casing or internal components. Avoid using excessive force during disassembly.
Tip 4: Document Disassembly. Photographing or noting the order in which components are removed aids in correct reassembly, particularly with complex fob designs. This prevents misplacement of parts.
Tip 5: Handle the Battery with Care. Avoid touching the battery terminals with bare fingers, as skin oils can impede electrical conductivity. Use non-metallic tools to manipulate the battery.
Tip 6: Confirm Battery Polarity. Double-check the battery polarity markings (+ and -) before installation. Incorrect polarity can damage the key fob’s circuitry. Some designs include physical features preventing incorrect insertion.
Tip 7: Ensure Secure Closure. After battery replacement, verify that the fob casing is completely and securely closed. Gaps or loose components can compromise water resistance and long-term durability.
Tip 8: Conduct a Comprehensive Functionality Test. Test all key fob functions locking, unlocking, alarm, and remote start (if equipped) immediately after battery replacement to confirm successful operation. Address any anomalies promptly.
Adhering to these tips significantly enhances the likelihood of a successful battery replacement, preserving the functionality and longevity of the Subaru key fob.
The concluding section summarizes the critical aspects of the battery replacement procedure, reinforcing the importance of careful execution and adherence to these guidelines.
How to Replace Battery in Subaru Key Fob
The preceding discussion detailed the procedure for exchanging the power source within a Subaru remote keyless entry device. Emphasis was placed on the necessity of proper tool selection, meticulous execution of the disassembly and reassembly processes, correct battery type identification and polarity alignment, and a thorough functionality test. Adherence to these guidelines is paramount for ensuring the continued operation of the key fob.
Successful completion of this task ensures the continued functionality of critical vehicle access and security features. Consistent vigilance regarding battery maintenance will prolong the lifespan of the key fob and mitigate potential inconveniences associated with a non-functional remote system. Owners are advised to consult the vehicle’s owner’s manual for model-specific instructions and to seek professional assistance if encountering complications beyond their technical expertise.
