Ever found yourself fumbling with your Subaru key fob, pressing buttons with no response? Maybe you’re stuck in the middle of nowhere, miles from pavement, and your trusty remote just died. It’s a common, frustrating scenario, especially for us off-roaders and DIY enthusiasts who rely on our vehicles. The good news is, you don’t always need a dealership to fix it. Often, the solution is a simple battery swap, and knowing how to open your Subaru key fob is the first step.
This guide from FatBoysOffroad will walk you through the process, ensuring you can tackle a dead key fob battery with confidence. We’ll cover various Subaru key fob types, the tools you’ll need, step-by-step instructions, and even some troubleshooting tips to get you back on the road—or the trail—in no time.
Understanding Your Subaru Key Fob: Types and Tools
Subaru has used several key fob designs over the years. Before you try to pry yours open, it’s helpful to identify which type you have. This will dictate the exact method for opening it and the battery you’ll need.
Common types include the older, bulkier integrated key/fob combo, the more modern “smart key” (often with a push-button start feature), and the newer, sleeker designs found in recent models.
Essential Tools for Key Fob Disassembly
You won’t need a full toolbox for this job, but having the right implements will prevent damage to your key fob’s plastic casing.
- Small Flathead Screwdriver: Ideal for prying open cases, but use with caution.
- Plastic Pry Tool (Trim Removal Tool): Highly recommended to avoid scratches and gouges on the plastic. These are invaluable for any automotive DIYer.
- New Battery: Most Subaru fobs use a CR2032 or CR1632 coin cell battery. Check your owner’s manual or the existing battery once opened.
- Soft Cloth: To protect the key fob while working on it.
- Optional: Tweezers for handling small batteries.
Always work on a clean, well-lit surface. This helps prevent losing small components and allows you to clearly see what you’re doing.
Step-by-Step Guide: How to Open Subaru Key Fob (Standard Remote)
This section focuses on the more traditional, non-smart key fobs, often found in models up to the mid-2010s. These typically have separate lock, unlock, and trunk buttons.
1. Locate the Seam and Emergency Key (If Applicable)
Examine your key fob carefully. You’ll notice a seam running along the edge where the two halves of the plastic casing meet. Some fobs also have a small button on the side that releases an emergency valet key.
If your fob has an emergency key, always remove it first. This often reveals a small slot or indentation that serves as a pry point.
2. Inserting Your Pry Tool
With the emergency key removed, look for a notch or a slight indentation along the seam. This is where you’ll insert your plastic pry tool or small flathead screwdriver.
Start gently. The goal is to create a small gap without forcing it, which could crack the plastic.
3. Gently Prying Apart the Casing
Once you’ve got a purchase, slowly twist the tool. You should hear a soft click as the plastic clips disengage.
Work your way around the seam, applying gentle, even pressure. Avoid using excessive force in one spot. This method is the safest way to how to open your Subaru key fob without damage.
The two halves of the casing should separate fairly easily once all clips are released.
4. Exposing the Circuit Board and Battery
Carefully open the fob. You’ll see the circuit board and the coin cell battery, usually held in place by small tabs or a simple slot.
Note the orientation of the battery (which side is facing up, usually the positive ‘+’ side) before removing it. This is crucial for correct reinstallation.
Opening Subaru Smart Keys (Proximity Fobs)
Subaru’s smart keys, often used with push-button start systems, look a bit different and sometimes require a slightly different approach to open. These are common in newer Outback, Forester, Crosstrek, and Impreza models.
1. Removing the Emergency Key Blade
Most smart keys have a physical key blade hidden inside. Look for a small release button or lever on the side or back of the fob. Press it and slide out the emergency key.
Removing this key often exposes a crucial pry point, usually a small slot right where the key was housed.
2. Using the Emergency Key as a Pry Tool
This is a clever design feature! The tip of the emergency key blade is often designed to fit perfectly into the pry slot you just exposed.
Insert the key blade into the slot and gently twist it. This should begin to separate the two halves of the fob’s casing.
If the key doesn’t fit or you’re worried about damaging it, a plastic pry tool is still a safe alternative.
3. Separating the Halves
Once you’ve started the separation with the emergency key, you can continue to gently pry around the seam with your plastic tool.
Again, listen for the clicks of the internal clips releasing. The goal is a smooth, controlled separation.
Inside, you’ll find the circuit board and battery, just like the standard remote. Make sure to note the battery’s orientation.
Battery Replacement and Reassembly
Once you’ve successfully managed to how to open your Subaru key fob, replacing the battery is the straightforward part.
1. Removing the Old Battery
Gently pry out the old coin cell battery. Sometimes there’s a small plastic or metal tab holding it in place that you’ll need to lift slightly with your small flathead screwdriver or tweezers.
Dispose of the old battery responsibly, following local regulations for electronic waste.
2. Installing the New Battery
Take your new CR2032 or CR1632 battery (confirm the correct type for your specific fob). Most Subaru fobs use a CR2032.
Insert the new battery with the correct orientation. Typically, the positive side (‘+’) faces up or towards the side you were working on.
Make sure it snaps securely into place under any retaining tabs.
3. Testing Before Closing
Before snapping the two halves back together, it’s a good idea to perform a quick test. Hold the open fob near your Subaru and try pressing the lock/unlock buttons.
If the vehicle responds, you’re golden! If not, double-check the battery orientation and ensure it’s seated properly.
4. Reassembling the Key Fob
Carefully align the two halves of the key fob casing. Make sure the buttons and internal components are correctly seated and haven’t shifted.
Gently press the halves together until you hear them click securely. Work your way around the seam to ensure all clips engage.
Reinsert the emergency key blade if you removed it.
Troubleshooting Common Key Fob Issues
Sometimes, opening the key fob and replacing the battery isn’t the end of the story. Here are some common issues and their fixes.
1. Fob Not Working After Battery Change
If your Subaru key fob still isn’t working after a fresh battery, consider these points:
- Battery Orientation: Double-check that the new battery is inserted with the correct positive/negative orientation.
- Wrong Battery Type: Ensure you used the exact battery type (e.g., CR2032 vs. CR1632).
- Poor Contact: Inspect the metal contacts inside the fob. Gently bend them up slightly if they appear flattened, ensuring good contact with the battery.
- Fob Needs Reprogramming: In rare cases, especially with older fobs, a battery change might cause the fob to lose its programming. This usually requires a specific sequence of steps (often involving the ignition and door cycles) or a visit to the dealership. Consult your owner’s manual for reprogramming instructions specific to your Subaru model.
2. Damaged Casing or Buttons
If your key fob has been dropped repeatedly, the internal components or external buttons might be damaged.
- Inspect Circuit Board: Look for any visible cracks or loose components on the circuit board. If found, a new fob is likely needed.
- Button Pads: Ensure the rubber button pads are correctly aligned and haven’t torn.
- Replacement Shells: You can often buy replacement key fob shells online for a fraction of the cost of a new fob. You simply transfer the internal electronics from your old fob to the new shell.
3. Intermittent Operation
An intermittently working fob could be due to a dying battery (even if it’s new but low quality), poor internal contact, or interference.
- Test with Another Battery: Try another new battery from a different pack or brand.
- Clean Contacts: Use a cotton swab with a tiny bit of rubbing alcohol to gently clean the battery contacts inside the fob.
- Environmental Interference: Strong radio signals or proximity to certain electronic devices can sometimes interfere with key fob operation. Try moving your vehicle to a different location.
Pro Tips for Off-Roaders and DIYers
For those of us who venture off the beaten path, a reliable key fob is more than a convenience—it’s part of our vehicle’s security and accessibility. Here are some extra tips:
- Carry Spare Batteries: Always keep a spare key fob battery (CR2032 or CR1632) in your glove box or off-road recovery kit. They’re small, light, and can be a lifesaver.
- Protect Your Fob: Consider a protective silicone cover for your key fob, especially if you’re prone to dropping it or if it gets exposed to dirt and moisture.
- Know Your Emergency Key: Practice using your emergency key to manually unlock your Subaru’s door. This is critical if your fob dies completely and you need to get in.
- Second Fob: If you have a second key fob, keep its battery fresh too. Rotate between them occasionally to ensure both are functional.
- Water Damage: If your fob gets wet, how to open your Subaru key fob quickly and remove the battery. Let the internal components air dry completely before reassembling. A desiccant packet (like those found in new electronics) can help.
Remember, while this guide covers the process for most Subaru key fobs, slight variations might exist between specific models and years. Always consult your vehicle’s owner’s manual for precise instructions or battery types if you’re unsure.
Frequently Asked Questions About Opening Your Subaru Key Fob
What battery does a Subaru key fob take?
Most modern Subaru key fobs, including smart keys, use a CR2032 coin cell battery. Some older or smaller fobs might use a CR1632. It’s always best to check your owner’s manual or visually inspect the existing battery after opening your fob.
Do I need to reprogram my Subaru key fob after changing the battery?
Typically, no. Subaru key fobs are designed to retain their programming even after a battery change. However, in very rare instances, particularly with older fobs or if the battery was completely dead for a long time, reprogramming might be necessary. Your owner’s manual will have specific reprogramming instructions if needed.
Can I open my Subaru key fob with a regular screwdriver?
Yes, you can use a small flathead screwdriver, but exercise extreme caution. Plastic pry tools are strongly recommended as they are less likely to scratch, mar, or crack the plastic casing of your key fob. If using a screwdriver, wrap the tip in electrical tape for extra protection.
My key fob won’t open, what should I do?
If you’re having trouble, first ensure you’ve removed any emergency key blade, as this often reveals the primary pry point. Apply gentle, consistent pressure with your pry tool along the seam. Avoid excessive force. If it still won’t budge, try a different section of the seam or consult your owner’s manual for diagrams specific to your fob model. A locksmith or dealership can also assist if you’re truly stuck.
How often should I change my Subaru key fob battery?
The lifespan of a key fob battery typically ranges from 2 to 4 years, depending on usage. If you notice the range decreasing or the unlock button becoming less responsive, it’s a good indicator that the battery is getting low and should be replaced soon.
Conclusion: Empowering Your DIY Spirit
Knowing how to open your Subaru key fob is a simple yet incredibly empowering skill for any car owner, especially those who love the DIY spirit. It saves you time, money, and the hassle of a dealership visit for a minor issue.
Whether you’re swapping a dead battery in your driveway or performing an emergency fix on a remote trail, this knowledge keeps you in control. Keep those spare batteries handy, protect your gear, and never let a dead key fob hold you back from your next adventure.
Stay safe, stay comfortable, and keep those wheels turning!
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