How to Turn Off a Subaru Key Fob

Turning off a Subaru key fob isn’t about powering it down—it’s about disabling its signal or replacing the battery to stop unintended alerts. Whether you’re troubleshooting, storing your fob, or preventing battery drain, this guide walks you through simple, safe methods for every Subaru model.

Key Takeaways

• Subaru key fobs don’t have an “off” switch: They’re always on but can be disabled by removing the battery or using signal-blocking storage.
• Battery replacement stops the fob from working: Swapping the CR2032 battery is the most common way to deactivate the fob temporarily.
• Use a Faraday pouch to block signals: This prevents accidental unlocking or alarm triggers when the fob is stored.
• Some models allow fob deactivation via the infotainment system: Check your owner’s manual for vehicle-specific settings.
• Avoid DIY disassembly unless necessary: Improper handling can damage internal components or void warranties.
• Reactivation is simple: Reinsert the battery or remove the fob from the blocking pouch to restore functionality.
• Consult your owner’s manual first: Subaru models vary slightly in key fob design and features.

Understanding Your Subaru Key Fob

If you’ve ever wondered how to turn off a Subaru key fob, you’re not alone. Many Subaru owners assume their key fob has a power button or sleep mode—but that’s not quite how it works. Unlike smartphones or tablets, Subaru key fobs are designed to be always “on” in a low-power state. They constantly listen for signals from your vehicle, ready to unlock doors, start the engine, or trigger the panic alarm with a button press.

This always-ready design is what makes keyless entry so convenient. Walk up to your Subaru Outback or Forester, and the doors unlock automatically. Press the start button inside, and the engine fires up—no fumbling for keys. But this convenience comes with a trade-off: the fob is always drawing a tiny amount of power from its internal battery, and it’s always transmitting a low-level signal when buttons are pressed.

So when people ask, “How do I turn off my Subaru key fob?” they’re usually asking one of three things:
– How do I stop it from accidentally unlocking my car?
– How do I preserve the battery when not in use?
– How do I disable it temporarily for security or troubleshooting?

The good news? You *can* effectively “turn off” your Subaru key fob—just not in the way you might expect. There’s no physical power switch, but there are several practical, safe methods to disable its functions. These range from simple battery removal to using signal-blocking storage solutions. In this guide, we’ll walk you through each method, explain how they work, and help you choose the best option for your needs.

Whether you’re storing your car for a long trip, troubleshooting a malfunctioning fob, or just want to prevent accidental door unlocks in a crowded parking lot, understanding how to manage your key fob’s activity is essential. Let’s dive into the details.

Why You Might Want to Turn Off Your Subaru Key Fob

Before we get into the “how,” let’s talk about the “why.” Why would anyone want to turn off a Subaru key fob? After all, it’s designed to make your life easier. But like any electronic device, there are situations where disabling it—even temporarily—makes perfect sense.

One of the most common reasons is **battery conservation**. Subaru key fobs use a small CR2032 coin cell battery, which typically lasts 3 to 5 years. But if you’re storing your car for an extended period—say, during a winter vacation or while traveling abroad—you might not want the fob draining its battery unnecessarily. Even in standby mode, the fob uses a tiny amount of power. Over months, that can add up, leaving you with a dead fob when you return.

Another reason is **accidental activation**. Have you ever pulled your keys out of your pocket and realized your car’s alarm was blaring? Or walked past your parked Subaru and noticed the doors unlocked themselves? This can happen if the fob’s buttons get pressed in your bag or pocket. While rare, it’s annoying—and potentially a security risk if your car unlocks in a public place.

Then there’s **signal interference**. In rare cases, electronic devices nearby (like smartphones, tablets, or even strong radio signals) can interfere with the fob’s communication with your car. This can cause erratic behavior, such as doors not locking or the engine failing to start. Temporarily disabling the fob can help isolate the issue.

Security is another concern. If you’re leaving your car in a high-theft area or storing it long-term, you might want to reduce the risk of relay attacks—a type of theft where criminals amplify the fob’s signal to trick the car into thinking the key is nearby. While modern Subarus have anti-theft features, some owners prefer an extra layer of protection by disabling the fob.

Finally, **troubleshooting** often requires isolating the fob. If your car isn’t responding to the key fob, or if the remote start isn’t working, turning off the fob (or replacing its battery) is a standard first step in diagnosing the problem.

In short, “turning off” your Subaru key fob isn’t about breaking it—it’s about managing its behavior to suit your needs. Whether you’re conserving battery, preventing accidents, or boosting security, knowing how to disable the fob gives you more control over your vehicle’s access system.

Method 1: Remove the Battery (The Most Effective Way)

If you want to completely disable your Subaru key fob, removing the battery is the most reliable method. This physically cuts power to the fob, stopping all functions—unlocking, locking, panic alarm, and remote start. It’s simple, safe, and works on every Subaru model with a removable battery.

Step-by-Step Battery Removal

Most Subaru key fobs use a standard CR2032 lithium coin cell battery. Here’s how to remove it:

1. **Locate the battery compartment.** On most Subaru fobs, this is on the back of the fob, near the key ring. You’ll see a small indentation or seam.
2. **Use a flat tool.** A small flathead screwdriver, butter knife, or even a coin can work. Gently insert the tool into the seam and twist slightly to pop open the fob.
3. **Open the fob carefully.** The two halves should separate easily. Be gentle—don’t force it, as you could crack the plastic.
4. **Remove the battery.** The CR2032 battery sits in a small metal holder. Use your fingernail or a non-conductive tool to lift it out.
5. **Store the battery safely.** Place it in a dry, cool spot. Label it if you’re storing it long-term.

Once the battery is out, the fob is effectively “off.” It won’t respond to button presses, and it won’t communicate with your car. This is ideal for long-term storage or if you’re troubleshooting a malfunctioning fob.

When to Use This Method

– **Long-term car storage:** If you won’t be using your Subaru for weeks or months, removing the battery prevents drain.
– **Troubleshooting:** If your fob isn’t working, a dead or loose battery is often the culprit. Removing and reinserting it can reset the connection.
– **Security:** For peace of mind, especially in high-theft areas, removing the battery eliminates the risk of relay attacks.

Tips and Warnings

– **Don’t lose the battery.** CR2032s are small and easy to misplace. Keep it in a labeled container.
– **Avoid metal tools near the circuit board.** When opening the fob, use plastic or non-conductive tools to prevent static damage.
– **Check for water resistance.** Some fobs have rubber seals. Reassemble carefully to maintain water resistance.
– **Replace with the same type.** Always use a CR2032 battery. Using the wrong size or type can damage the fob.

Reinserting the battery restores full functionality. Press any button to test it. If the fob still doesn’t work, the battery may be dead and need replacement.

Method 2: Use a Faraday Pouch (Signal Blocking)

If you don’t want to remove the battery but still want to disable your Subaru key fob, a Faraday pouch is an excellent alternative. These small, pouch-like bags are made from conductive materials that block radio frequency (RF) signals. When you place your key fob inside, it can’t communicate with your car—effectively “turning it off” without any disassembly.

How Faraday Pouches Work

Faraday pouches create a shielded environment using layers of metallic fabric or foil. When the fob is inside, external signals (like those from your car) can’t reach it, and the fob’s signals can’t escape. This prevents accidental unlocking, remote start activation, and relay attacks.

They’re commonly used by security-conscious drivers, especially in urban areas where car theft via signal amplification is a concern. Some people even keep their fobs in a Faraday pouch at home, especially if they live in apartments or densely populated areas.

Choosing the Right Pouch

Not all Faraday pouches are created equal. Look for one that:
– Is specifically designed for key fobs (not just phones).
– Has been tested and certified for RF blocking (look for 30dB+ shielding).
– Fits your fob comfortably without forcing it.
– Has a secure closure (zipper or Velcro).

Popular brands include Silent Pocket, RF Shield, and Keyguardz. Prices range from $10 to $30.

How to Use It

1. Place your Subaru key fob inside the pouch.
2. Close the pouch securely.
3. Store it in a safe place—your nightstand, drawer, or safe.

To reactivate the fob, simply remove it from the pouch. It will resume normal operation immediately.

Pros and Cons

Pros:
– No disassembly required.
– Reusable and convenient.
– Protects against relay attacks.
– Preserves battery life.

Cons:
– Adds an extra step when using the fob.
– Can be misplaced or forgotten.
– Slightly bulkier than a regular keychain.

This method is ideal for daily use if you’re concerned about security or accidental activation. It’s also great for travelers who want to disable their fob while flying (some airlines recommend it to prevent interference).

Method 3: Disable via Vehicle Settings (Model-Specific)

Some newer Subaru models allow you to disable key fob functions directly through the vehicle’s infotainment system. This is a software-based method that turns off certain remote features without physically altering the fob.

Which Models Support This?

This feature is available on Subaru vehicles with the STARLINK system, typically 2017 and newer models like the Outback, Forester, Legacy, and Ascent. Check your owner’s manual or the STARLINK menu to confirm.

How to Access the Settings

1. Turn on the ignition (or start the car).
2. Go to the **Settings** menu on the infotainment screen.
3. Navigate to **Vehicle Settings** > **Keyless Access** or **Remote Key**.
4. Look for options like “Disable Remote Functions” or “Turn Off Key Fob.”

Note: The exact wording varies by model and software version. Some systems only allow you to disable specific functions (like remote start), not the entire fob.

What This Does

Disabling via settings doesn’t turn off the fob itself—it tells the car to ignore signals from the fob. The fob still has power and can send signals, but the car won’t respond. This is useful for:
– Preventing accidental remote start in cold weather.
– Stopping kids from playing with the fob.
– Troubleshooting communication issues.

Limitations

– Not all functions can be disabled (e.g., panic alarm may still work).
– The fob remains powered, so battery drain continues.
– Settings may reset after a software update.

Always re-enable the fob when you need full functionality. This method is best used temporarily and in conjunction with other methods (like a Faraday pouch) for maximum security.

Method 4: Store the Fob Far from the Vehicle

Sometimes, the simplest solution is also the most effective: keep your Subaru key fob far away from your car. Distance reduces signal strength, making it harder for the fob to communicate with the vehicle—especially if you’re inside a building or another vehicle.

How Distance Affects Signal

Subaru key fobs operate on a low-power radio frequency (typically 315 MHz or 433 MHz). Their range is usually 50 to 100 feet under ideal conditions. But walls, metal, and electronic interference can reduce this range significantly.

If you store your fob in a different room—or better yet, in a metal box or safe—the signal may not reach your parked car. This prevents accidental unlocking or remote start activation.

Practical Tips

– **Keep the fob in a metal container.** A metal lockbox, ammo can, or even a thick metal drawer can block signals.
– **Use multiple barriers.** Place the fob behind walls, in a basement, or in a garage with metal doors.
– **Avoid proximity to the car.** If you’re working in your driveway, store the fob inside the house.

This method won’t stop the fob from draining its battery, but it’s a zero-cost way to reduce accidental activation. It’s especially useful if you have multiple Subarus or live in a multi-car household.

When It’s Not Enough

If you’re concerned about relay attacks or need complete deactivation, distance alone may not be sufficient. Combine this method with a Faraday pouch or battery removal for best results.

Troubleshooting Common Key Fob Issues

Even with the best care, Subaru key fobs can develop problems. Here are some common issues and how to fix them—often without needing to “turn off” the fob permanently.

Fob Not Responding

If your fob stops working, the first step is to check the battery. A weak or dead battery is the most common cause. Replace it with a new CR2032 and test the fob.

If that doesn’t work, try re-syncing the fob:
1. Stand near your car.
2. Press and hold the **Lock** and **Unlock** buttons simultaneously for 10–15 seconds.
3. The car should flash its lights or chirp, indicating reconnection.

Intermittent Functionality

If the fob works sometimes but not always, it could be:
– A loose battery connection (reseat the battery).
– Signal interference (move away from electronics).
– A damaged antenna inside the fob (requires professional repair).

Panic Alarm Won’t Stop

If the panic alarm is triggered accidentally, press the **Panic** button again to turn it off. If it keeps going off, the fob may be damaged or the battery may be loose. Remove the battery to stop it immediately.

Remote Start Not Working

Check:
– The fob battery.
– Vehicle settings (remote start may be disabled).
– Climate conditions (some Subarus disable remote start in extreme cold).

If problems persist, visit a Subaru dealer for diagnostics.

Conclusion

So, how do you turn off a Subaru key fob? The answer is: you don’t—because it doesn’t have an “off” switch. But you *can* disable its functions using practical, safe methods like removing the battery, using a Faraday pouch, adjusting vehicle settings, or increasing physical distance.

Each method has its place. For long-term storage, battery removal is best. For daily security, a Faraday pouch is convenient. For temporary troubleshooting, vehicle settings or distance may suffice.

The key is understanding your needs and choosing the right approach. And remember: reactivating your fob is just as easy—reinsert the battery, remove it from the pouch, or re-enable the settings.

With these tips, you’ll have full control over your Subaru key fob—keeping your car secure, your battery lasting longer, and your peace of mind intact.

Frequently Asked Questions

Can I really turn off my Subaru key fob?

No, Subaru key fobs don’t have a power switch, but you can disable their functions by removing the battery, using a Faraday pouch, or adjusting vehicle settings. These methods effectively “turn off” the fob without damaging it.

Will removing the battery damage my key fob?

No, removing the battery is safe and won’t damage the fob. Just be gentle when opening it and avoid using metal tools near the circuit board. Reinsert the battery to restore functionality.

How long does a Subaru key fob battery last?

A CR2032 battery typically lasts 3 to 5 years, depending on usage. If your fob stops working or responds slowly, it’s likely time for a replacement.

Can I disable my key fob without removing the battery?

Yes! Use a Faraday pouch to block signals, adjust settings in your vehicle’s infotainment system, or store the fob far from your car to reduce communication.

Is a Faraday pouch necessary for security?

Not always, but it’s a smart precaution in high-theft areas. It prevents relay attacks by blocking the fob’s signal, giving you extra peace of mind.

What should I do if my key fob stops working after reassembly?

Check that the battery is properly seated and the fob is fully closed. If it still doesn’t work, the battery may be dead or the fob may need professional repair.