How to Replace the Battery in a 2003 Mazda MX-5 Miata Key Fob

How to Replace the Battery in a 2003 Mazda MX-5 Miata Key Fob

Key fob grant easy access to your MX-5 Miata. When the keyless entry remote battery is weak or dead you will not to be able unlock doors remotely. In this post, we walks you through how to disassembly your car key fob and replace your Mazda key battery.

What size battery does 2003 Mazda MX-5 Miata keyless entry remote take

Changing 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 type of your fob’s batteries.
  • flat head screwdriver
  • 1xCR2025 battery

Step by step instruction

Inside of your keyless entry remote installed coin battery. Accurately try to disassemble your fob with pry tools. Change one CR2025 battery with flat head screwdriver.

Now it's time to install new battery in fob’s case. Battery must be placed with the same polarity as was a previous. Your key will not work if you mistakenly put battery wrong way.

After the new battery installed, verify keyless entry remote functionality by pressing buttons. If everything working fine, assemble your fob’s case in reverse order.

At this point squeeze keyless entry fob's back cover together. Line your shell pieces together and put it together by hands from top to bottom. Inspect your fob case for gaps. If it is not firmly closed try to repeat last step.

Key Fob Battery Replacement 2003 Mazda MX-5 Miata Video

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

Still not working? Buy new one

Frequently Asked Questions

Remote key fob of Mazda MX-5 Miata use 1xCR2025 batteries. Most CR2025 batteries are under $4 depending on the brand, type and size packaging you buy. You can take old battery to the store, to be sure.

Usually, after keyless entry remote battery change, reprogramming not required. Remote key fob reprogramming procedure often described in user's manual of your vehicle.

Changing your key fob battery is simple to do in 2003 Mazda MX-5 Miata. Most of car manufacturers think of the clients and make a special hole for keyless entry remote disassembly.

Dealer service cost for replace the battery in remote key fob is from 50 to 600 dollars depending on the brand.

You should change batteries inside key fob of Mazda MX-5 Miata at least every three or four years. lifespan of battery vary on their amount of use, operating conditions and quality.

If your Mazda signal strength reduced, fob's battery more than 4 years old, key fob buttons not working or need multiple clicks to unlock or lock doors, it's probably battery change in key fob required. Current battery is weak or dead with a high probability, but if it's not help, fob change or repair needed.
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Fob Compatibility:

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