How to Replace the Battery in a 2005 Mazda MX-5 Miata Key Fob

How to Replace the Battery in a 2005 Mazda MX-5 Miata Key Fob

Remote key fob grant access to your Mazda. When the key fob battery is dead or weak you’ll not to be able lock trunk or doors remotely. In this article, you’ll benefit from knowing how to disassembly Mazda keyless entry remote and replace a dead battery DIY. If you decide to do it at home near MX-5 Miata, follow our instruction, but don't forget to check everything you need before you start.

What type battery does 2005 Mazda MX-5 Miata keyless entry remote take

Prior to open keyless entry remote check all that you need: flat head screwdriver and 1 CR2025 battery.
  • flat head screwdriver
  • 1xCR2025 battery

Step by step instruction

A tiny button cell battery installed in the your remote key fob. Carefully try to pry apart your key fob with hands or flat head screwdriver. Remove 1xCR2025 battery with flat head screwdriver.

Change old battery with fresh one CR2025. Every battery has a negative and positive side and if you put the wrong connector down, the current cannot go into your circuit board and make it work. Check polarity on battery, by "+" mark.

After the new battery installed, check keyless entry remote functionality by pressing buttons. If everything is functioning, assemble your keyless entry fob's body in reverse order.

The last thing to do is put your cover back on fob. Accurately try to put the two halves together by hands from top to bottom. Check your key body for gaps. If it is not tightly closed try to repeat last step.

How to change the battery video guide

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

Still not working? Buy new one


Remote key fob of Mazda MX-5 Miata use 1xCR2025 batteries. Price for CR2025 batteries are under $6 depending on the size packaging, type and brand you buy. You can take old battery to the store, to be sure.

Often, after keyless entry remote battery change, you do not need to reprogram. Remote key fob reprogramming procedure often described in user's manual of your vehicle.

Replacing your keyless entry remote battery is simple to do in 2005 Mazda MX-5 Miata. Most of car manufacturers think about customers and make a special hole for remote key fob open.

Dealer service price for replace the battery in fob is $50-600 depending on the make.

You should change batteries inside key fob of modern cars at least every 4 years. lifespan of battery vary on their amount of use, quality and operating conditions.

These signs will warn you that it's possible time to change battery in your 2005 Mazda MX-5 Miata: key fob buttons not working, you didn't change battery more than 4 years, signal strength reduced and multiple clicks to unlock or lock doors required.
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Fob Compatibility:

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