Losing power in your Subaru key fob is more common than most drivers realize. Imagine standing in the parking lot, pressing the unlock button, and nothing happens. Your key fob battery might be dead, but replacing it is simple and can save you from an unexpected tow or a stressful trip to the dealership. With just a few tools and a little patience, you can restore your fob’s full functionality in minutes.
First, identify the key fob type for your Subaru and check the exact battery model, usually a CR2032. Next, separate the fob carefully using a plastic pry tool or a metal key wrapped in tape to avoid scratches. Remove the old battery and note its orientation for correct placement of the new one. Insert the new battery securely, snap the fob back together, and test all buttons to ensure they work. Dispose of the old battery properly, and store a spare for future convenience.
What type of battery does a Subaru key fob use?
Most Subaru key fobs use a standard CR2032 coin battery. This battery is small, widely available, and affordable, typically lasting 2 to 3 years depending on usage. Some older Subaru models might use a CR1620 or similar type, so it’s always good to check your fob’s manual or remove the battery to confirm the model number. Using the wrong battery can cause the fob to malfunction or even damage the internal circuitry.
When replacing the battery, always handle the fob gently. Use a plastic pry tool to avoid scratches or damaging the case. If you prefer a metal key, wrap it in tape to protect the fob. Once opened, you’ll see the battery orientation marked with plus and minus signs, which is essential for proper installation. After inserting the new battery, press all buttons to confirm that the fob sends signals to your vehicle correctly. A working fob ensures your doors, trunk, and engine start system function without interruptions.
Maintaining a spare CR2032 battery at home or in your glove box is a smart habit. This small precaution can save you time and stress when the battery dies unexpectedly. Frequent testing of your key fob every few months can also help catch battery wear before it becomes a problem. Always handle the fob carefully during the replacement process, keeping dirt, moisture, and static electricity away from its sensitive electronics to prevent damage.
How do I know when my Subaru key fob battery needs replacement?
Signs of a dying Subaru key fob battery are usually subtle at first. You might notice that the unlock button responds inconsistently or requires multiple presses. In some cases, the key fob only works from very close range. If the dashboard or key fob indicator shows a low battery warning, it’s time to act. Ignoring these signs can leave you locked out or prevent your engine from starting.
A fading battery can also affect remote start and panic functions. If these features fail or respond slowly, the battery is likely the culprit. Testing your fob with a multimeter or swapping in a new battery temporarily can confirm this without replacing the fob entirely. Timing is key because once a fob dies completely, the convenience and security features of your Subaru become limited.
Replacing the battery proactively avoids emergency trips to the dealership. It’s a simple DIY task that saves money and frustration. Using the correct battery model and carefully reassembling the fob ensures the device will function just like new. Small maintenance steps like these are part of responsible Subaru ownership, keeping both your car and your routine hassle-free.
How to Replace Battery in Subaru Key Fob: Easy Step-by-Step Guide
Identify Your Key Fob Type
Subaru has several key fob designs, including standard, smart key, and push-to-start types. Identifying your fob type is critical because it determines the battery size and replacement method. The easiest way to check is by comparing your fob to pictures in your owner’s manual or inspecting the back of the fob for model numbers. For smart keys, extra care is needed because the internal circuit board is delicate and easily damaged during opening.
After identifying the type, check the battery label. Most standard fobs use a CR2032, while older or compact fobs might have CR1620 or CR2025. Using the wrong battery size can prevent the fob from closing properly or transmitting signals. Once you know your battery type, gather a small flathead screwdriver, a plastic pry tool, or a metal key wrapped in tape to gently open the fob without scratching it.
Handling your fob carefully is important. Apply even pressure when prying open the casing, and avoid forcing any clips, which could break the fob. Always remove the old battery in the correct orientation to remember the plus and minus placement. This small detail ensures the fob will work immediately after inserting the new battery.
- Identify fob type first
- Check battery model carefully
- Use gentle tools to open casing
- Note battery orientation
Gather Tools and Battery
Before opening your Subaru key fob, gather the right tools. You need a small flathead screwdriver or a plastic pry tool. Plastic tools are preferred to avoid scratching, but a metal key wrapped in tape can work in a pinch. Also, make sure you have the correct battery, typically a CR2032. Keep the area clean and dry because moisture or dirt can damage the fob’s electronics.
Having everything ready makes the process smooth. Open the fob slowly, using steady pressure at the seam. Listen for clicks that indicate clips releasing. Remove the battery carefully using a finger or small non-metal tool to avoid bending contacts. Compare the new battery with the old one to confirm size and voltage match. Placing the new battery in the correct orientation is crucial for proper fob operation.
Keep spare batteries on hand for future replacements. This saves a last-minute trip to the store. Testing the new battery before fully closing the fob ensures functionality. After replacing, check all buttons, including lock, unlock, and panic, to confirm signals reach the car.
- Use a plastic pry tool
- Gather correct battery type
- Open fob slowly and carefully
- Test battery before closing
Open the Fob
Opening your Subaru key fob is easier than most people think. Start by locating the seam along the edge of the fob. Insert a plastic pry tool or a tape-wrapped metal key and gently twist. The fob will start to separate at the seam, releasing the clips without damage. Avoid using excessive force, which can crack the casing or bend the internal board.
Once the fob is open, you will see the battery seated in a small compartment. Note its orientation carefully, as reversing the polarity can prevent the fob from working. Some fobs have a small cover over the battery itself; gently lift this cover to access the battery without touching any circuitry. Keep all parts organized to prevent losing clips or screws.
The internal components are delicate, so work on a clean, flat surface. Avoid static discharge by touching a metal object or grounding yourself. Once the battery is exposed, you’re ready to remove the old one safely and prepare for the new replacement.
- Locate seam along fob
- Use gentle prying tools
- Note battery orientation
- Work on a clean surface
Remove Old Battery
With the fob open, removing the old battery is simple but must be done carefully. Slide the battery out using fingers or a small non-metal tool. Avoid touching the circuit board, as oils and dirt from your hands can interfere with electrical contacts. Compare the old battery with the new one to confirm size, voltage, and type.
Check for any signs of corrosion or dirt inside the battery compartment. If you notice any buildup, gently clean it with a dry cloth. Do not use liquids, as these can damage the electronics. Removing the old battery is also a good opportunity to inspect the fob for any cracks or loose components that might need attention.
Store the old battery properly until disposal. Coin batteries should not be thrown in regular trash; recycle them at an approved collection site. This step keeps your home safe and ensures environmental responsibility.
- Slide battery out gently
- Avoid touching circuit board
- Inspect for corrosion
- Store old battery safely
Install New Battery
Installing a new battery in your Subaru key fob is straightforward. Make sure you insert it in the correct orientation, usually with the plus side facing up. Place it securely in the compartment and ensure it sits flat against the contacts. Misalignment can prevent the fob from sending signals.
After placing the battery, press down gently to ensure full contact. Test the fob while it is still open to confirm that all buttons work properly. If the fob doesn’t respond, check the battery orientation or look for loose clips inside the casing. Once confirmed, snap the fob halves back together carefully, ensuring all clips lock into place.
Keep the fob clean while handling. Avoid touching the battery terminals with greasy fingers. A properly installed battery restores full function to your fob, including remote start, panic, and door lock features.
- Insert battery correctly
- Ensure full contact with terminals
- Test before closing fob
- Snap halves together securely
Reassemble and Test
After replacing the battery, reassemble your Subaru key fob carefully. Align the two halves and press until the clips click into place. Avoid forcing it, which can break the casing. Once closed, test each button to ensure proper operation. Check lock, unlock, panic, and trunk buttons to confirm signals reach the vehicle.
If a button doesn’t work, reopen the fob and double-check battery placement and internal connections. Make sure nothing is obstructing the contacts. Testing the fob before storing it ensures you won’t face an inconvenient situation outside your vehicle. Keeping a spare battery in your glove compartment is wise for emergencies.
A properly maintained fob lasts for years. Routine battery replacement prevents sudden failure and keeps your Subaru’s convenience features reliable. Treating the fob with care while swapping batteries ensures long-term functionality.
- Snap fob back together
- Test all buttons
- Check internal connections if needed
- Keep spare battery
Final Thoughts
Replacing a Subaru key fob battery is quick, inexpensive, and prevents frustration. By following these detailed steps, you can restore your fob’s functions in minutes. Always handle the fob carefully, keep spare batteries, and test buttons after installation. Knowing how to replace battery in Subaru key fob gives you confidence, saves dealership trips, and ensures your car’s convenience features work reliably every day.
| Action | Details | Tips |
|---|---|---|
| Identify fob type | Check manual or back of fob | Confirm model before opening |
| Gather tools | Plastic pry tool or tape-wrapped metal key | Keep tools clean and dry |
| Open fob | Insert tool at seam, twist gently | Avoid breaking clips |
| Remove battery | Slide out old battery carefully | Avoid touching circuit board |
| Clean compartment | Check for corrosion or dirt | Use dry cloth only |
| Insert new battery | Align plus side, press gently | Ensure full contact |
| Test fob | Check all buttons | Test before snapping case closed |
| Reassemble | Snap halves together | Listen for clicks and confirm alignment |
Frequently Asked Questions (FAQs)
Is it difficult to replace a Subaru key fob battery?
Replacing a Subaru key fob battery is straightforward and can be done in minutes. With a plastic pry tool or a tape-wrapped key, you can open the fob without damaging it. Most batteries are standard CR2032 coin cells, widely available and inexpensive. Once opened, remove the old battery, note its orientation, and insert the new one. Testing the fob before closing ensures everything works. It’s a simple DIY task that saves time and dealership visits.
Can I use a metal tool to open the fob?
Yes, but you should wrap the metal tool in tape to prevent scratches. Plastic pry tools are preferred because they minimize risk to the casing. Using a metal tool carefully at the seam allows you to separate the halves without cracking clips. Avoid using excessive force or prying near the buttons. The goal is to protect both the fob exterior and the internal circuitry while still giving you access to the battery compartment.
Do I need to program the fob after replacing the battery?
Usually, no. Replacing the battery does not erase the fob’s programming. Once the battery is installed correctly, the fob should work immediately with your Subaru. If the fob doesn’t respond, check battery orientation and contact points. Only in rare cases, such as older Subaru models with integrated electronics, might a reprogram be needed. Testing all buttons after battery replacement ensures functionality without extra steps.
Is it necessary to remove the battery slowly?
Yes, removing the battery slowly prevents damage to the circuit board and surrounding clips. Use a plastic pry tool or your fingers to slide the battery out carefully. Sudden force can bend contacts or dislodge internal components. Taking your time also allows you to inspect the battery compartment for corrosion, dirt, or signs of wear, which can improve long-term fob performance.
Can I replace the battery without removing the fob case?
No, the case must be opened to access the battery. The fob casing protects delicate circuits and ensures proper button function. Attempting to insert a battery without opening can damage the contacts or result in a poor fit. Properly opening the case allows you to place the battery in the correct orientation and test the fob before reassembly.
Do I need to dispose of the old battery safely?
Yes, coin batteries should be recycled at approved collection sites. Throwing them in regular trash can be hazardous due to chemical leakage. Store old batteries in a small container until recycling. Safe disposal protects the environment and prevents accidental ingestion by children or pets, keeping your home safe while maintaining eco-friendly habits.
Is a spare battery recommended?
Absolutely. Keeping a spare CR2032 battery in your glove box or home ensures you’re prepared for sudden fob failure. It saves a last-minute trip to the store and prevents inconvenience, especially if you rely on remote start or panic features. Rotate spares periodically to ensure they remain fresh.
Can I damage the fob by touching the circuitry?
Yes, oils and static electricity from your hands can damage the fob. Use clean fingers or a non-metal tool when handling internal parts. Avoid touching contacts and circuitry directly, and work on a dry, flat surface. Ground yourself before opening to reduce static risk. Proper handling ensures longevity and reliable performance.
