How to Replace the Battery in a Toyota Prius Key Fob

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Replace the Battery in a Toyota Prius Key Fob

How to Replace the Battery in a Toyota Prius Key Fob

Here's how to replace the battery on a 2004-2009 Prius remote entry key fob. You'll know your battery has died when the car won't start without the key in the ignition and keyless entry stops working.

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Step 1 of 11
Slide the switch on the fob to remove the key.

Slide the switch on the fob to remove the key.

Step 2 of 11
Once the key has been removed flip over the fob.

Once the key has been removed flip over the fob.

Step 3 of 11

With your thumb on the Toyota logo gently press the same switch that you used to remove the key while sliding the back plate up.

Step 4 of 11
Remove the four screws to get access to the battery.

Remove the four screws to get access to the battery.

Step 5 of 11
Remove the old battery.

Remove the old battery.

Step 6 of 11
Replace the battery with a fresh CR2032 battery.

Replace the battery with a fresh CR2032 battery.

Step 7 of 11
Screw all the screws back in.

Screw all the screws back in.

Step 8 of 11
Put everything back together by lining up the hinges on the fob and the backplate.

Put everything back together by lining up the hinges on the fob and the backplate.

Step 9 of 11
Gently slide the backplate all the way down while pressing in the same switch that you used to remove the key.

Gently slide the backplate all the way down while pressing in the same switch that you used to remove the key.

Step 10 of 11
Everything should be perfectly lined up!

Everything should be perfectly lined up!

Step 11 of 11
Slide the key back in and your fob should have all the original functionality.

Slide the key back in and your fob should have all the original functionality.

You're Done

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4 Comments
Supplies

1 Prius key fob

1 CR2032 battery

Burkhard Specht

the key will have a tiny little red light flashing occasionally when the battery is about to give out.

Burkhard Specht 3 weeks ago

Daniel Raffel

Zach, we'd love to see a guide on how to replace the battery in a BMW key. Maybe you can make it? I owned a BMW for awhile but sold it and never had to change the battery in the key. I'm guessing it's pretty different.

(author) last year

Zach Beggs

Think this would work on a bmw key?

Zach Beggs last year

Can Duruk

I feel the key should have a way to notify the user before the battery is depleted.

Can Duruk last year

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Daniel Raffel

@Bola glad I could help!

(author) 5 months ago

Bola Ajala

I was on the verge of heading to the Toyota dealership!!! Thanks for saving me...this made it so easy to change the battery myself

Bola Ajala 5 months ago

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Rex Hauck

thanks for posting this...

Rex Hauck last year