How to Replace the Battery in a 2018 Mazda MX-5 Miata Key Fob

How to Replace the Battery in a 2018 Mazda MX-5 Miata Key Fob

Remote key fob grant easy access to your Mazda. If the remote key fob battery is dead you lose your keyless entry fob's ability to use remote opening function. In this case, we demonstrate how to disassembly Mazda key fob and change a discharged battery DIY. If you decide to do it at home near MX-5 Miata, follow our instruction, but first make sure you have all you need.

What is the battery key fob use

Don't forget before open key fob check all that you need: CR2025 battery and flat head screwdriver.
  • flat head screwdriver
  • 1xCR2025 battery

Step by step guide

A tiny coin cell battery installed in the your remote key fob. Move the key out of the way if it is in the remote key fob.

Carefully try to open your fob with pry tools. Change 1xCR2025 battery with flat head screwdriver.

Change old battery with new one CR2025. Be sure to connect the battery the right way around in a circuit. Your remote key fob will not work if you connect battery wrong way.

When the new battery installed, check remote key fob by pressing buttons. If all functions works, assemble your keyless entry fob's case in reverse order.

The last thing to do is put your cover back on fob. Gently try to put the pieces together by hands from top to bottom. If your key shell firmly closed, we done. If not, repeat the last step.

Key Fob Battery Replacement 2018 Mazda MX-5 Miata Video

Mazda MX-5 Miata Smart Key Fob Battery Replacement (2016 - 2019)

Still not working? Buy new one


Key fob of Mazda MX-5 Miata require 1xCR2025 batteries. Most CR2025 batteries are under $4 depending on the size packaging, type and brand you buy. Take your old battery to the store, with you to find a proper replacement.

Key fob in most of cases do not require to be reprogrammed after battery replace. If your key not working, recheck new battery voltage. If it is not help, read user's manual or contact local dealer.

Yes, you can replace battery in your 2018 Mazda MX-5 Miata key yourself. Most hard part is to open keyless entry fob's case. It's pretty simple with our instruction.

The price to change the battery inside remote key fob can run anywhere from $30 to as high as $500 depending on the brand and the service pricing.

Keyless entry remote batteries in Mazda MX-5 Miata should be changed once in three or four years, although this will vary based on their amount of use and battery quality. If your remote key fob decreased signal strength, you should replace batteries before it stop open doors and make problems for you.

If your Mazda has low key battery indicator on dashboard, need multiple clicks to unlock or lock doors, key fob buttons not working or signal strength reduced, it's probably battery replace in key fob required. Currently installed battery is discharged with a high probability, but if it's not help to fix issues, key fob change or repair needed.
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Fob Compatibility:

  1. FCC ID: WAZSKE13D01
  2. Models: 2016-2019 Mazda MX-5 Miata