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The Mazda 3, also known as the Mazda Axela, is a fun-to-drive, reliable, and safe compact car. Released in 2004, the vehicle is currently in its fourth generation. As successful as the car has always been, it has recently reached new heights of popularity and acclaim. At the start of 2019, the Mazda 3 was the company’s fastest-selling vehicle. The same year, U.S. News rated it the number 2 best compact car of the year.

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Mazda 3 drivers have dealt with a variety of key fobs over the years. Starting with a simple rectangular key fob in the first generation, and later one with a retractable key, the line has now graduated to use Mazda’s elegant “smart” key.

No matter what key fob you have, you will be able to change it on your own—quickly and easily. This is a total guide for Mazda 3 key fob battery replacement. We will show you how to change the battery of every key version since 2004. Looking for a different Mazda key fob?

MODELFOBYEARSBATTERYBUY
3Smart Key2014, 2015, 2016, 2017, 2018CR2025Check on Amazon
3Flip2010, 2011, 2012, 2013CR1620Check on Amazon
3Rectangular2004, 2005, 2006, 2007, 2008CR2025Check on Amazon

How to replace the Mazda 3 2014, 2015, 2016, 2017, 2018 smart key fob battery

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Scroll down to see a full video tutorial or read on for a step-by-step guide.

What you will need: • 1x CR2025 battery • Flat-head screwdriver

Replacing your battery for your smart key is easy. First, remove your internal key. Inside of the area that the key came from are two small seams, one on each side. Insert the head a flat-head screwdriver into each slot and twist to partially separate the two halves of the key fob. Next, use the same technique on the now separated sides of the key fob until the two halves separate fully.

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Now that you’re inside, remove the plastic disc covering the battery with your fingers. Here is your CR2025 battery. Remove the old battery, and slide the new one in face-up. The rest is simple, just replace the plastic disc, click the two pieces of the key back together, and return your key to its compartment. That’s it, your Mazda 3 smart key should now be charged and ready to go.