Are you having trouble opening your key fob? Do you want to learn the easiest guide for your Subaru Legacy key fob battery replacement?
Then check below to see the step-by-step guides and video tutorials on how to change the dead batteries in each of your key fob battery types. The best part? You don’t even need to consult an automotive locksmith.
Did you know that there are five different key fobs used with the Legacy over the years? All of these devices are easy to open and take inexpensive, easy-to-find batteries.
Read on to find out how to change the battery in each of these key fobs.
For other Subaru models, see our Subaru key fob battery page.
| MODEL | FOB | YEARS | BATTERY | BUY BATTERY |
|---|---|---|---|---|
| Legacy | Silver Sides | 2015, 2016, 2017, 2018, 2019, 2020, 2021 | CR2032 | Check on Amazon |
| Legacy | Fixed Key | 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019 | CR1620 | Check on Amazon |
| Legacy | Rectangular | 2006, 2007, 2008 | CR1620 | Check on Amazon |
| Legacy | Teardrop | 2006, 2007 | CR2025 | Check on Amazon |
| Legacy | Simple | 1999, 2000, 2001, 2002, 2003, 2004 | CR2032 | Check on Amazon |
How to Replace the Subaru Legacy “Silver Sides” Key Fob Battery (2015-2021)
This Subaru key fob battery replacement takes less time. Watch the video below for a step-by-step tutorial on how to change the battery in your key fob.
What you will need:
- 1x CR2032 battery
- Flat-head screwdriver
How to Replace the Battery in a Subaru Legacy Key Fob
Total Time: 5 minutes
1. Hold silver button and remove internal key
Flip your key fob over to the back. Press and hold on to the silver button while you remove the internal key.
2. Use screwdriver to twist, open fob halves
There is a little slot right above the keyhole (parallel to it). Insert your flathead screwdriver into this slot and twist or turn it like a key to open up the key fob into two halves.
3. Remove battery holder, handle carefully
Next, remove the part without the battery and set it aside. Now, dump out the component holding the battery with the circuit board so you’re holding it in your hand. Hold on the sides and be careful not to touch the back with all the electronics attached.
4. Insert screwdriver in battery’s space, pop it out
Locate the space between the battery and the plastic. Now, insert the corner of your flathead screwdriver here and lift it up. The battery will pop right out.
5. Install charged CR2032 battery, check polarity and fit
Take a new fully charged CR2032 battery and install it. Push the first side in, and press the other side so it clicks firmly while touching the metal contacts. Ensure the positive side with the texts on it is facing up.
Note that the new battery has to match the old one for the key fob to work.
6. Reassemble fob with key
Finally, return the control module to the key fob and reassemble all the pieces back together in reverse order. Fix your internal key and all is done.
Press the buttons on the new key fob, if the light comes on, it means you did everything right. Excellent job!
This is the battery you need for the Subaru Legacy “Silver Sides” key fob:
How to Replace the Subaru Legacy “Fixed Key” Key Fob Battery (2008-2019)
Watch the video below for a step-by-step tutorial on your Subaru Legacy key fob battery replacement.
What you will need:
- 1x CR1620 battery
- Flat-head screwdriver
Step 1
On the corner of the keyring is a little indentation. Insert your screwdriver and twist it to separate the device into two halves. Set aside the back without the battery.
Step 2
Next, remove the cover holding the battery compartment. Now that you’re holding the component housing the battery, look on the sides, can you notice some latches? You have to unlock them all to access the old battery.
Step 3
Put your screwdriver into each plastic latch, and wiggle as you push it in. Then gently lift it up. The latch will open. Repeat this step for all the latches and the component will come apart to reveal the dead battery inside. [
Step 4
Time to remove the old battery and replace it with a new one. Using the corner of your flathead screwdriver, get under the battery and it will pop right out.
Step 5
Slide in the new battery (CR1620) with the positive side facing down. Ensure it touches the metal contacts.
Step 6
Return every part into place in reverse order and you have yourself a perfectly working key fob battery.
You’ve successfully replaced your Subaru key fob. Go ahead and test the new key fob on your vehicle by unlocking or locking the door of your Subaru legacy.
This is the battery you need for the Subaru Legacy “Fixed Key” key fob:
How to Replace the Subaru Legacy “Rectangular” Key Fob Battery (2006, 2007, 2008)
Watch the video below for a step-by-step tutorial on how to change the key fob batteries in your Subaru.
The tools you will need:
- 1x CR1620 battery
- Regular flat-head screwdriver
- Philips/Precision head screwdriver
Step 1
The first step is to remove the screw at the back of the key fob using the Philips head screwdriver. Set it aside where you can easily find it. The back cover should come off once the score is out.
Step 2
Now, remove and hold the part housing the battery. Under the device is a little latch. Insert your flathead screwdriver into this place and gently lift up the plastic until you can separate the device. This will you access to the battery.
Step 3
From the top, insert the corner of your flathead screwdriver under the dead battery in a prying motion to lift it up.
Step 4
Slide in the new battery and click it into place. The positive side should go face down. It’s important that you fix the battery in this position for it to work.
Step 5
Put the screw back in. Note, do not screw too tightly. Lastly, reassemble the pieces to fit in again.
That’s all! What an easy key fob battery replacement, don’t you think?
This is the battery you need for the Subaru Legacy “Rectangular” key fob:
How to Replace the Subaru Legacy “Teardrop” Key Fob Battery (2006, 2007)
Follow these few steps below or watch the video below on your Subaru Legacy key fob battery replacement.
The tools you will need:
- 1x CR2025 battery.
- Regular flat-head screwdriver.
Step 1
Start by holding the key fob upright (don’t squeeze). Now insert your screwdriver into the slot right along the seam at the top of the device. Turn the flathead screwdriver and the key fob will come apart.
Step 2
Using the same tool to lift the dead battery out from the corner.
Step 3
Replace the old battery with a new CR2025 with the positive side down. Click the battery firmly into place.
Step 4
The last thing is to reassemble the plastic pieces and your Subaru key fob good to go!
That was a quick battery replacement process. Verify the functionality: unlock and lock your car door. If that goes smoothly, then you did everything right. Great work!
This is the battery you need for the Subaru Legacy “Teardrop” key fob:
How to Replace the Subaru Legacy “Simple” Key Fob Battery (1999- 2004)
Replacing this key fob battery is the easiest. Watch the video below for a step-by-step tutorial on how to change your Subaru key fob battery. Follow through for an easy battery replacement.
What you will need:
- 1x CR2032 battery
- Flat-head screwdriver
- Precision or Philips head screwdriver
Step 1
For starters, using a precision screwdriver, remove the two screws on the back of the key fob. Open the device into two halves easily. Set the back cover aside.
Step 2
Remove the dead battery using the same regular flathead screwdriver.
Step 3
Slide in the new CR2032 battery and ensure it clips into place.
Step 4
Finally, click the back covers together and tighten the screws (not too tight).
There you go! Your battery should start working perfectly now. Start enjoying your remote start.
This is the battery you need for the Subaru Legacy “Simple” key fob:
These are the precision screwdrivers I used to open this key fob in the video:
Frequently Asked Questions
How often should I change my Subaru key fob battery?
Change your Subaru key fob battery once in every 4 years. However, the lifespan depends on the quality of construction and usage. The signs to look for include a reduction in signal strength or delay in the lock and unlock button responses. Change your batteries as soon as you notice these signs.
Can I perform a Subaru key fob battery replacement myself?
Yes, you can. The process is simple and can be done in minutes. Scroll up to the above guides and find your battery Subaru models battery type and how to replace it. Oftentimes, you won’t need to reprogram or reset the key fob after battery replacement.
Bottom Line
Regardless of the Subaru models you own, it’s expedient to keep it in good condition. And this includes replacing the key fob batteries when due.
Thankfully, the above guide has given you everything you need to complete the process. You will find the right tips, tools, and how to get your battery in the Amazon store.
Don’t wait till your battery becomes faulty, learn how to change it now.