Opening a Subaru Key Fob

Opening a Subaru key fob is easier than most people think. With the right tools and a little patience, you can access the battery, circuit board, and internal components in just a few minutes. This guide walks you through every step safely, so you can replace the battery, troubleshoot issues, or simply understand how your Subaru key fob works without causing damage.

Have you ever stared at your Subaru key fob, wondering how to get inside it? Maybe the battery died, or maybe you just want to understand what makes it tick. Whatever the reason, opening a key fob might seem intimidating, but it is really quite simple.

In this guide, we will walk you through everything you need to know about opening a Subaru key fob. From the tools you need to the step-by-step process, you will have all the information right here. We also share common mistakes to avoid and tips that make the whole process smoother.

Whether you own a Subaru Outback, Subaru Forester, Subaru Impreza, or any other model, the key fob opening process is very similar across most Subaru vehicles. Let us get started.

Key Takeaways

• You need minimal tools: A small flathead screwdriver or pry tool is all you need to open most Subaru key fobs.
• Know your fob type: Different Subaru models use different key fob designs, so identifying yours first saves time and effort.
• Be gentle with the housing: Forcing the shell open can crack the plastic and damage the internal circuit board.
• Replace the battery easily: Most Subaru key fobs use a common CR2032 battery that costs just a few dollars.
• Keep track of small parts: The emergency key blade and small screws can get lost easily, so work on a clean surface.
• Reassembly matters: Properly aligning the housing halves ensures the water seal stays intact and the buttons work correctly.

Why You Might Need to Open Your Subaru Key Fob

There are several reasons why you might need to pop open your Subaru remote key. Understanding your goal helps you prepare properly and avoid unnecessary steps.

Battery Replacement

The most common reason is a dead battery. When your key fob not working suddenly stops responding, the battery is usually the culprit. A fresh CR2032 battery costs less than five dollars and takes only minutes to install.

Water Damage or Cleaning

If your fob has been dropped in water or exposed to moisture, opening it lets you dry the internal components. You can also clean the buttons and contacts gently to restore proper function.

Button Replacement or Repair

Worn-out buttons can make your fob frustrating to use. Opening the housing gives you access to the rubber dome switches and circuit board so you can inspect or replace them.

Understanding the Internal Components

Some Subaru owners simply want to learn how their key fob housing works. Knowing the layout of the circuit board, battery compartment, and transponder chip helps you troubleshoot issues faster.

Tools You Will Need

Before you start, gather these simple tools. You do not need anything fancy or expensive.

• Small flathead screwdriver or a plastic pry tool
• CR2032 battery (if replacing the battery)
• Soft cloth or towel to protect the fob surface
• Tweezers for handling small screws or springs
• Magnifying glass (optional, for inspecting small components)

A plastic pry tool is the safest option because it will not scratch the plastic shell. If you only have a metal screwdriver, wrap it in a soft cloth to prevent marks on the fob casing.

Step-by-Step Guide to Opening a Subaru Key Fob

Now let us walk through the actual process of opening your Subaru key fob. Follow these steps carefully and you will have the housing open in no time.

Step 1: Remove the Emergency Key Blade

Most Subaru key fobs have a hidden emergency key blade tucked inside. Look for a small button or latch on the side of the fob. Press it and slide the metal blade out. Set it aside in a safe place so it does not get lost.

This key blade is important because it lets you manually unlock the door if the remote stops working entirely. Keep it somewhere you can find it easily.

Step 2: Locate the Seam

Hold the fob in your hand and look for the seam where the two halves of the key fob shell meet. On most Subaru fobs, the seam runs along the longer edge of the remote. You will see a small gap or line where the plastic pieces join.

Some Subaru models have a slight indent or notch at one end that gives you a starting point for inserting your pry tool. Feel around the edges gently with your fingernail to find it.

Step 3: Insert the Pry Tool

Insert your flathead screwdriver or plastic pry tool into the seam. Start at the end where the emergency key was removed. Apply gentle, even pressure and slowly work your way around the edge.

Do not force it. The two halves are held together by small clips that can break if you push too hard. Gentle, steady pressure is all you need.

Step 4: Release the Clips

As you work around the seam, you will feel the plastic clips release one by one. Continue sliding your tool along the edge until the top half of the key fob housing lifts off.

If a clip feels stuck, try wiggling the tool slightly or applying pressure at a different point along the seam. Patience is your best friend here.

Step 5: Lift the Housing Open

Once all the clips are released, carefully lift the top half of the fob away from the bottom half. Inside, you will see the circuit board, the battery, the rubber button pads, and possibly a small spring or metal contact.

Place the top half face-down on your soft cloth. This keeps the buttons and small parts from sliding around while you work.

Step 6: Access the Battery or Components

Now you can easily access the battery compartment. The battery is usually held in place by a small metal clip or sits freely in a slot. Note the orientation of the positive and negative sides before removing it.

If you are replacing the battery, simply pop out the old one, insert the new CR2032 battery with the correct orientation, and test the fob before reassembling.

Common Mistakes to Avoid

Opening a key fob sounds simple, but a few common mistakes can cause damage. Here is what to watch out for.

• Using too much force: Forcing the halves apart can crack the plastic or break internal clips. This makes the fob difficult to reassemble properly.
• Losing the emergency key blade: Always set the blade aside before you start working. A lost emergency key means you cannot manually unlock your doors.
• Mixing up the screws: Some Subaru fobs have tiny screws inside. Keep them organized and remember where each one goes during reassembly.
• Touching the circuit board with dirty hands: Oils and dirt from your fingers can interfere with the electrical contacts. Handle the circuit board by the edges.
• Forgetting to test before reassembly: Always test the fob with the new battery before putting the housing back together. This saves you from having to open it again.

Tips for Reassembling Your Subaru Key Fob

Once you have finished your work inside the fob, reassembly is just as important as opening it. A poorly reassembled fob can lead to water leaks, button malfunctions, or a loose feel.

Start by placing the circuit board and battery back into the bottom half of the housing. Make sure the rubber button pads are aligned correctly over the circuit board contacts. Then gently press the top half down until all the clips snap into place.

You should feel a satisfying click as each clip engages. If the fob feels loose or the buttons do not press evenly, open it back up and check your alignment. A well-reassembled Subaru smart key should feel snug and secure.

When to Seek Professional Help

Most of the time, opening a Subaru key fob is a straightforward DIY task. However, there are situations where professional help makes sense.

If your fob has sustained significant damage, if the circuit board is visibly burned or corroded, or if you need to program a new key after opening the fob, a dealership or automotive locksmith can help. They have the specialized equipment to program transponder keys and Subaru immobilizer systems that DIY methods cannot replicate.

Also, if you feel uncomfortable opening the fob yourself, there is no shame in visiting a professional. Many auto parts stores and locksmiths will open and replace the battery for a small fee.

Maintaining Your Subaru Key Fob

Once you have successfully opened and serviced your fob, a little regular maintenance goes a long way. Keep the contacts clean with a dry cloth. Replace the battery every two to three years, even if it still works, to avoid being stranded with a dead fob.

Store your Subaru remote key away from extreme heat and moisture. A small pouch or compartment in your bag works well. Avoid placing heavy objects on top of the fob, as this can damage the buttons and internal components over time.

Final Thoughts

Opening a Subaru key fob is a simple skill that saves you time and money. With just a small pry tool and a fresh battery, you can handle most common issues right at home. The key is to go slowly, be gentle with the clips, and keep track of every small part.

Whether you are replacing a dead battery, cleaning a water-damaged fob, or just curious about what is inside, this guide gives you everything you need. Now you can open your Subaru key fob with confidence and handle minor repairs on your own.

Remember, the emergency key blade is your backup if anything ever goes wrong. Keep it accessible, keep your fob maintained, and you will have reliable remote access to your Subaru for years to come.

Frequently Asked Questions

What type of battery does a Subaru key fob use?

Most Subaru key fobs use a CR2032 battery, which is a common 3-volt lithium coin cell battery. You can find this battery at most grocery stores, pharmacies, and auto parts shops for just a few dollars.

Can I open my Subaru key fob without a screwdriver?

Yes, you can use a plastic pry tool, a butter knife with a cloth wrapped around it, or even a strong fingernail in some cases. The key is to use something thin and flat that slides into the seam without scratching the plastic.

Will opening my Subaru key fob void the warranty?

This depends on your warranty terms and the dealer. Opening the fob yourself for a simple battery replacement usually does not void the warranty, but if the fob is damaged during the process, it may not be covered. Check with your dealer if you are unsure.

How do I know which Subaru key fob model I have?

Check your Subaru owner’s manual for the key fob diagram. You can also look at the shape and button layout of your fob. Subaru typically uses three or four-button remotes depending on the model year and trim level.

What should I do if a clip breaks while opening my key fob?

If a plastic clip breaks, you can still reassemble the fob by pressing the halves together firmly. The fob will still function, but it may feel slightly loose. A small drop of super glue on the clip area can help hold it together temporarily.

Can I replace the buttons inside my Subaru key fob?

Yes, the rubber dome switches under the buttons can be replaced individually. Once the fob is open, you can purchase replacement dome switches online and swap them out carefully. Make sure to match the new switches to the original positions on the circuit board.