How To Change Battery In Subaru Key Fob?

by Phil Borges // in Car

Replacing your Subaru key fob battery is inexpensive to get you back into your car after a lockout. You can do this by yourself within five minutes instead of paying dollars for a mechanic to do it for you. However, you need to be careful when replacing it, and you should have prior knowledge about the batteries’ type, terminals, and voltage to be replaced on your old ones so you would do it correctly. If you want to learn about it, keep reading.

How to replace the battery of a Subaru Key Fob?

There would be times when you need to change battery subaru key fob. So here are the steps to replace your Subaru key fob battery:

  1. Remove the physical key from the keyless entry by pressing the small button at the back of the key fob.
  2. Insert the flat-bladed screwdriver into one end of your key fob’s slot. Then, twist it to separate the two sides and open its compartment.
  3. Remove the old battery by inserting the screwdriver underneath to pry out the battery.
  4. Slide in the new batteries for subaru key fob inside the compartment. The side of the battery with the positive (+) sign should be facing up.
  5. Before closing up the two cases, check the bottom where the battery compartment is placed and ensure no dust or dirt is left.
  6. Reattach both sides of your Subaru Key Fob together and return the physical key.
  7. Press the buttons on top until you hear a beep for each one pressed. If it does, you have replaced the battery successfully.

What battery does a Subaru Key Fob use?

The Subaru key fob uses a CR2032 battery which can be purchased at any local convenience store or online. This battery could last one to two years, depending on how you use and take care of it.

Can I start the Subaru with a key fob that has a dead battery?

If your Subaru has a dead battery, you can still access it if you properly place the key fob inside the car. You can do this by placing your foot on the brake pedal while pushing the key fob on the engine start button. While your foot is on the pedal, the engine will detect the chip on the key fob, and your car will start in a few seconds.

Why won’t the car detect the key fob?

The car won’t detect the key fob if you have a dead or weak battery. If this happens, you need to replace your key fob’s battery. Also, it may be due to the distance of your vehicle to your key fob. Thus, move closer and try pressing the button again.


Indeed, Subaru key fob battery replacement is doable and could take only five minutes. Ensure your new battery is the same as your old one to avoid issues or malfunction. Knowing this beforehand saves you time, energy, and money. Thus, following the above steps to replace your Subaru key fob battery is essential.

About the author, Phil Borges

Phil Borges is a battery aficionado. He's written extensively about batteries, and he loves nothing more than discussing the latest innovations in the industry. He has a deep understanding of how batteries work, and he's always on the lookout for new ways to improve their performance.