How do you replace the car key battery in a Toyota?

I’ve had my Toyota for about four years now and I’ve never had any issues with the key. But recently, I haven’t been able to remotely unlock my car. I’m assuming that it’s an issue with the key battery. How do you replace the car key battery in a Toyota?

Answer
Most car key batteries last around four to seven years, so you’re probably right in assuming it’s time for a change.
To get started, check your Toyota owner’s manual to find out what type of battery you need. It’s likely a CR20323V battery, which you can buy at most auto or department stores.
Once you have the battery you need:
  • Open the key fob by releasing the slot component that holds the key in place.
  • Before you get to the battery, you will need to very gently take out the green circuit board. Once the circuit board is gone, the battery will be accessible.
  • Replace the dead battery with the new one and carefully reassemble the key fob.
  • Test the key fob to ensure it works.
Replacing the battery in your Toyota’s key is pretty simple after you do it once! The only thing simpler is switching your car insurance with the Jerry app!
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Chloe Jenkins
Answered on Nov 25, 2021
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