How to Replace the Battery in a 2004 Mazda MX-5 Miata Key Fob

How to Replace the Battery in a 2004 Mazda MX-5 Miata Key Fob

Keyless entry remote allow access to your Mazda. Once the key battery is dead you’ll lose your fob’s ability to use remote opportunities. In this post, we explained how to open Mazda remote key fob and change a weak battery yourself. If you choose to do it at home near MX-5 Miata, follow our instruction, but don't forget to check tools and materials required.

What is the battery remote key fob use

Replacing battery in remote key fob require one CR2025 battery and flat head screwdriver. Prepare these materials and tools before opening and make sure to match the size of your keyless entry fob's batteries.
  • 1xCR2025 battery
  • flat head screwdriver

Simple steps to replace the battery in your MX-5 Miata's key fob

A small coin cell battery installed in the your remote key fob. Gently try to pry apart your keyless entry remote with pry tools. Replace one CR2025 battery with flat head screwdriver.

Get new battery and install it in keyless entry fob's case. Battery must be placed with the same position as was an old. Your remote key fob will not work if you mistakenly put battery wrong way.

When the new battery installed, verify key fob functionality by pressing buttons. If everything is functioning, assemble your keyless entry fob's shell in reverse order.

The last thing to do is put your cover back on fob. Delicately try to assemble the pieces together by hands from top to bottom. Inspect your key fob shell for gaps. If it is not tightly closed try to repeat last step.

Video of key fob opening

How To Replace A Mazda Miata MX-5 Key Fob Battery (2006-2013)

Still not working? Buy new one

Frequently Asked Questions

Key fob of Mazda MX-5 Miata require 1xCR2025 batteries. Most CR2025 batteries are under $6 depending on the type, brand and size packaging you buy. You can take old battery to the store, with you to find a proper replacement.

Usually, after key battery replace, you do not need to reprogram. Don't be scare of this procedure, because often it's described in user's manual.

Changing your keyless entry remote battery is easy to do in 2004 Mazda MX-5 Miata. Most of car manufacturers think of the clients and make a special hole for key fob open.

Dealer service price for change the battery in key is from 50 to 600 dollars depending on the car.

Key fob batteries in Mazda MX-5 Miata should be changed every three or four years, also this will differ based on their amount of use and quality. If your keyless entry remote shortened signal strength, you should replace batteries before it stop working and make trouble for you.

If your MX-5 Miata need multiple clicks to unlock or lock doors, key fob buttons not working, signal strength reduced or has low key battery indicator on dashboard, in most cases battery replace in key fob needed. Current battery is discharged with a high probability, but if it's not fix problem, fob replace or repair needed.
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Fob Compatibility:

  1. FCC ID: KPU41701
  2. Models: 2001-2005 Mazda MX-5 Miata