Replace Mazda Key Fob Battery

Replace Mazda Key Fob Battery

Learn how to replace the Mazda key fob battery. Below you will find several videos that show how to replace the battery in several Mazda key fob batteries.

Replace Mazda Key Fob Battery

If your Mazda key fob battery is dead, you can still open the vehicle manually and start the vehicle.

What you will need

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Amazon Basics 4 Pack CR2032 3 Volt Lithium Coin Cell Battery
Amazon Basics 4 Pack CR2032 3 Volt Lithium Coin Cell Battery
DESIGNED TO LAST: 8-year leak-free shelf life; EASY IDENTIFICATION: Engraved with battery model for quick identification
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Energizer 2025 Batteries, Lithium CR2025 Battery, 2 Count
Energizer 2025 Batteries, Lithium CR2025 Battery, 2 Count
Energizer 2025 Lithium Coin Battery; Cell size: 2025; IEC: CR2025; Type: Lithium Coin; Volt: 3
  • New Battery
    • CR2032 3-Volt Lithium Coin Cell Battery, Most Common.
    • CR2025 – Does not fit all in one Combo Key/Remote
  • Screwdriver


  1. Remove the metal key from the Mazda key fob.
  2. You should see two slots where you will need to insert the flat screwdriver. Once you insert the screwdriver in this slot, twist it slightly, and the shell will open. Do the same for the other side.
  3. Next, you will notice that only part of the shell is separated. Insert the screwdriver on the edge of the shell and twist it again. This should open the shell completely. Place the back Mazda key fob case aside.
  4. Remove the key fob battery cover from your Mazda remote.what battery size does mazda key fob use
  5. Pull out the dead key fob battery from the Mazda keyless remote.mazda keyless remote battery replacement
  6. Insert the new battery. Make sure the positive (+) symbol is facing you.
  7. how to change battery in mazda key fob
  8. The positive is on top, while the negative side of the button cell battery faces the key to install new battery in mazda key remote
  9. Insert the O-ring in its channel if it came off during the earlier step when you removed the battery from the Mazda remote.
  10. how to open mazda key to change battery
  11. Press the battery cover in place diy mazda key shell battery replacementhow do you change the battery in mazda 3 6 cx7 key fob
  12. Press the two key fob cases together until you hear the shells click and lock in place.mazda advanced key battery replacement
  13. Check the side of the key shell to make sure it is fully closed. mazda smart key battery replacement
  14. Press the metal (emergency key) into the Mazda key.mazda keyless entry battery replacement
  15. Test the key to ensure that the remote is working properly.mazda keyless ignition start battery replacement

Procedure and instructions on how to replace the battery on Mazda flip key.

What you will need

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Panasonic CR1620 batteries are engineered to provide reliable long-lasting power; Reliable in a wide range of operating temperatures (14°F to 140°F)
  • CR1620 Battery


  1. Press the metal button to flip/open the metal key.
  2. Use a small flathead screwdriver and insert it in the small opening, as shown in the video.
  3. Your Mazda key fob shell will split in two.
  4. Separate the Mazda key.
  5. Use a small screwdriver to open the keyfob part with the lock/unlock buttons. The screwdriver is inserted at the edge where the two key halves join each other.
  6. The key fob will open up, and you will see the old battery.
  7. Pry the battery out using a small flathead screwdriver.
  8. Install the new battery. The positive side of the battery (+) needs to face the back of the keyfob.

We hope you find the Replace Mazda Key Fob Battery guide helpful. Check these troubleshooting and repair guides for more help on your Mazda.

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  1. Anonymous says:

    Perfect video for a first time battery replacer! Thank you!

  2. Anonymous says:

    Great guys, thanks job done, saved me a fortune, but I could do with a spare key.

  3. Anonymous says:

    Very good, clear instructions on this video. Thanks!!

  4. Anonymous says:

    We did it!! How easy you made this by following your most excellent and very easy to understand instructions!
    Brenda Davis

  5. THANKS. Replaced my Mazda 3 key battery in about 3 minutes. Just used my nails to pry fob apart. Great instructions. Cheers Robert

  6. Anonymous says:

    Thank you Youcanic. Love this site.

  7. Anonymous says:

    Really well done video thank you. I Easily changed the battery.

  8. Anonymous says:

    Awesome tutorial. Thank you Youcanic for saving me a trip to the Mazda dealership.

  9. Anonymous says:

    I removed the key from my Mazda 3 keyfob and cound’t tell how to open the shell. After looking at this video, everything made sense. Thanks.