How to Open Your 2012 Mazda 3 Key Fob and Change Battery

How to Open Your 2012 Mazda 3 Key Fob and Change Battery

Keyless entry remote grant easy access to your car. Once the key fob battery is dead or weak you not to be able close trunk or doors from distance. In this post, we explained how to disassembly Mazda keyless entry remote and replace a dead battery yourself. If you decide to do it at home near 3, use this guide, but don't forget to check everything you need before you start.

What size battery does 2012 Mazda 3 keyless entry remote required

Before starting disassembly remote key fob make sure that you have all required tools and materials: CR2032 battery and flat head screwdriver.
  • flat head screwdriver
  • 1xCR2032 battery

Simple steps to replace the battery in your car's key fob

Inside of your key fob installed small coin cell battery. Move the key out of the way if it is in the key fob.

Carefully try to disassemble your key fob with pry tools. Change 1 CR2032 battery with flat head screwdriver.

Get new battery and install it in fob’s shell. Be sure to connect the battery the right way around in a circuit. Your remote key fob will not work if you place battery wrong way.

Before assembling keyless entry fob's case, check that all functions works by testing buttons on circuit board.

At this point squeeze fob’s back cover together. Line your case two halves together and put it in place by hands from top to bottom. If your fob body tightly closed, we done. If not, repeat the last step.

Video of key disassembly

Replace Mazda Remote Battery

Still not working? Buy new one

Frequently Asked Questions

Remote key fob of Mazda 3 require 1xCR2032 batteries. Most CR2032 batteries are under $4-6 build upon the type, size packaging and brand you buy. You can take old battery to the store, with you to find a proper replacement.

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

Replacing your remote key fob battery is simple to do in 2012 Mazda 3. Most of car manufacturers think of the clients and make a special hole for keyless entry remote open.

The cost to change the battery inside keyless entry remote is from $30 to as high as $500 depending on the brand and the service station.

Remote key fob batteries in Mazda 3 should be changed once in three years, although this will differ based on their amount of use and battery quality. If your key fob shortened signal strength, you should change batteries before it stop close doors and make problems for you.

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

  1. FCC ID: WAZX1T768SKE11A03
  2. Models: 2010-2013 Mazda 3