How to Open the Mazda Key Fob & Replace a Dead Battery

June 28th, 2021 by
Man opening car with key fob

If you live around the Schaumburg area, you know how important it is to be able to unlock your car or start it remotely, however, what happens when your key battery needs replacing? We recommend visiting our Elgin Mazda service department to have our experts replace it for you. However, if you want to learn how to open the fob and replace the battery yourself, these are the basic things you’ll need: 

  1. A small flat head screwdriver with the head wrapped in tape to prevent scratches
  2. A replacement battery on hand (CR2025 battery)
  3. Your Mazda key fob

How to Open Mazda’s Key Fob

If you want to know how to open your Mazda6 keyfob or any Mazda key fob, it is quite similar across the entire lineup for the last few years. To open the fob and access the battery, check out these easy steps:

  1. You first need to remove the auxiliary key. This is done through pressing the auxiliary key button on the back of the key fob. 
  2. Once you remove the metal key, you will see a slot on each side of the key fob.
  3. Carefully place the tape covered flathead screwdriver in each of the slots to open the case. 
  4. Once the case is removed, ensure you place the cover somewhere where you won’t lose it. 

How to Change Battery in Mazda Key Fob?

Once the case is removed, you should have access to the Mazda key battery. Let’s review this quick and easy process:

  1. First, remove the battery cap and place it somewhere safe.
  2. Carefully remove the key fob battery ensuring you don’t damage the small rubber ring that the battery rests on.
  3. In the case that you have accidentally damaged the rubber ring, this should be replaced prior to replacing the battery.
  4. Once you ensure that the rubber ring is safely in place, you can insert the new battery ensuring that the positive (+) side of the battery is facing up. 
  5. After the battery is in place, you can then place the key fob case back on, ensuring both clicks snap into place on each side. 

Come Visit Biggers Mazda for Quick and Easy Service 

If you want to ensure that your key is being replaced correctly, come visit the trusted experts at Biggers Mazda to schedule an appointment with our service department. We will carefully replace your key fob battery and get you back on the road, or even show you how to do it yourself. Mazda owners from St Charles to Bartlett trust Biggers Mazda for our quick and reliable service. We even offer our Mazda service coupons so you can save money on your next visit.


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