Mazda CX-9 Key Fob Battery Remote Replacement DIY Years 2007-2019

Mazda’s CX-9 is a stylish, powerful, and fun-to-drive crossover SUV. The first generation ran from 2007 to 2015 before receiving a few updates in 2016. The second generation CX-9 is considered one of the most visually stunning SUVs on the market today. It features an updated design and the new SkyActiv platform and engine.

This model uses 2 key different key fobs. The first generation uses Mazda’s flip key fob with a retractable physical key and remote locking, unlocking, and panic capabilities. The second generation’s smart key offers all of that good stuff along with hands-free opening and push-to-start. If you need to get into either of these key fobs—we’ve got you covered. This guide will show you everything you need to know to replace your Mazda key fob battery. Looking for a different Mazda key fob?

CX-9Smart Key2016, 2017, 2018, 2019 CR2025 Check on Amazon
CX-9Flip2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015 CR1620 Check on Amazon

How to replace the Mazda CX-9 2016, 2017, 2018, 2019 smart key fob battery

This smart key fob can easily be opened to replace the CR2025 battery inside. 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

First, flip your smart key over and find the small switch on the back. Push the switch down, and while holding it down, pull on the silver key ring hole to release the internal key. From here, we will need our flat-head screwdriver. Locate the grooves on the left and right walls inside the area the key came from. Insert your screwdriver into a groove and twist to loosen that side. Repeat for the groove on the other side. This will begin to separate the two halves of the key fob.

Now, down the sides of the key fob, there should be openings. Insert your screwdriver into these openings, twist, and work your way down each side until you can separate the two halves of the key fob with your fingers. Inside, you will find a plastic disc holding the battery in place. Remove it to expose the battery. The CR2025 battery can simply be removed with your fingers.

Place your new battery in the compartment with the face up. Put the plastic disc back on top of the battery, click the two halves of the key fob back together, and insert your internal key. That’s it! Battery replaced. Good job.

Mazda CX-9 Smart Key Fob Battery Replacement (2016 - 2019)
This is the battery for this CX-9 key fob:
Energizer 2025 Batteries, Lithium CR2025 Battery, 2 Count
  • Energizer 2025 Lithium Coin Battery
  • Delivers long-lasting, dependable performance in specialty devices like heart rate monitors, remotes, keyless entry systems, glucose monitors, toys, and games.Operating temperature:-30C to 60C
  • Holds power for up to 10 years in storage, ensuring you have Lithium Coin Batteries ready when you need them

GIF Visual Guide

In this video, I'm going to show you how to change the battery on the key fob for the Mazda CX-9. And there are two versions of this. The four button that I have here with the hatch button and another there that just has three. They both have the same method for getting in to replace the battery. And they were both used from 2016 to 2019.

And they both use a CR 2025 battery. So I'm going to show you how to get in and replace this. And the first thing you're going to want to do is turn it over, find this little lever here and push it down to remove the valet key. And from here, we want to find these little grooves on the inside. And with a regular flathead screwdriver, you can actually slip it right in between them.

You'll feel it kind of locked into place and just give it a little twist. And just a small amount of force is all you need to get in and create that separation. Go ahead and do it on the groove on the other side.

Okay. And now you can put it in the opening and just move it down, giving it a little twist. And there you go. It comes right off. Now you can remove this piece of plastic, keeping the battery safe, and just slide out the CR 2025 with your finger.

Go ahead and get a new one. Goes right back in its place. Make sure this little piece of rubber that can actually come off is nicely in position for you to just lay it back on and click the back into place. You're done. And put this right back in.

Now, I do want to show you a method to get in here. If you don't have a screwdriver on hand. And it's very easy to just access this with your fingernails.

Just put it in on the corner there and doing the same thing. You can pop out each side, making a little separation and using the key, putting it in about half way. You can apply just a little force twisting like that and without damaging anything. It just lets you access the back. And you can go ahead and change the battery just like before.

And go ahead and pop this back on. Valet key back in, and you're good to go.

How to replace the Mazda CX-9 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015 flip fob battery

It can be a bit tricky to replace the CR1620 battery inside this key fob. Scroll down to see a full video tutorial or keep reading for a step by step guide.

What you will need:
• 1x CR1620 battery
• Flat-head screwdriver
• Precision screwdriver (3.0mm/PH0 or smaller)
• Pen, pencil, toothpick or another thin tool

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Start by pressing the metal button on the front of your key fob to flip out the key. Look inside the compartment where the key is housed and locate the seam on the top of the compartment close to the outer edge. Holding the top of the fob (where the metal button is) with your thumb, use your fingers or a flat-head screwdriver to push up against the seam, separating the top piece of plastic from the rest of the key fob.

Now that you have created some separation, look to the bottom of the key fob where the keyring attaches. Insert your flat-head screwdriver into the opening and twist, pushing the two pieces further apart. You should now be able to fully separate the two halves with your fingers, exposing the battery.

Next, take your precision screwdriver, pen, or another thin tool. Holding the key fob with the key facing down, insert your tool into the bottom-right corner of the indentation that houses the battery (there is a small black arrow pointing towards it). Use a prying and rocking motion to pull the battery up with your tool until the battery pops out. Now you can change your CR1620 battery.

Put the new battery face down into the compartment. Start with the top side of the battery, getting that lined up before pushing on the bottom of the battery to click it into place. Reconnect the two pieces of the key fob (being careful that the circuit board is secure) and flip your key back in. That’s it, your Mazda CX-9 flip key fob has a brand new battery!

Mazda CX-9 Flip Key Fob Battery Replacement (2007 - 2015)
This is the battery for this CX-9 key fob:
Amazon Basics 2 Pack CR1620 3 Volt Lithium Coin Cell Battery
  • IN THE BOX: 2-pack of CR1620 3 volt lithium coin cell replacement batteries for small electronic devices
  • DEVICE COMPATIBLE: Ideal for watches, calculators, games, medical devices, and more
  • DESIGNED TO LAST: Long-lasting, reliable battery life; performs in extreme temperatures

GIF Visual Guide

Hello everyone. Today I will show you how to change the battery in your Mazda CX-9 key Fob. This Fob was used from 2007 to 2015. This is the three battery version of this Fob. Excuse me, the three button version of this Fob, if yours has four batteries, it was four buttons.

It was used between 2007 and 2013. The procedure to get in here is going to be exactly the same, and they both use a CR 1620 battery. So no matter what you have, you can follow along and replace your battery. Today, opening the key, flipping that out will reveal this little groove on the inside. Going to actually push up on this part like that to make a little separation to remove it from the bottom.

If yours is a little bit tighter than mine, you can't do it with your finger. You're having some trouble. Take something like a flathead screwdriver, holding the top, not holding this part, because we're going to be pushing that up, holding the top and finding that groove.

It just doesn't take that much force to push it up. And I'm going to finish it with my screwdriver to separate these two halves and open it up. Now, this is in there pretty good, and I can't really get it out with my finger. I'm going to show you two ways to do it. If you're really prepared and you have a little precision.

Screwdriver like this comes from a set that I got just for a couple of dollars online. I can give you a link for that. If you have this, it's going to be the fastest and the safest way to remove this battery without damaging your Fob. Excuse me, but I was also able to do it with a regular pin. So I'll show you both versions.

Now, if you have something like this screwdriver, you can just locate this little arrow here. That's where I'm going to put it. In the bottom right corner, going down and just rocking and prying it until it pops out. Show you that again, finding the corner, pushing down, and there we go.

Let me just pick up this battery if I can, put it back in. Okay, let's say you don't have one of these screwdrivers. You can just take a pen or something like this and going into the same corner, push down and pry and it comes right out. Might get a little ink on your battery, but that's not a big deal.

Again, just pry it out. Now, when you get your replacement, make sure the side that has the brand and the battery information goes down. You can flip it upside down. That's the positive side. You're going to put it on the positive side right there and sliding the top part in first.

Easiest way, you just push the bottom down and you're good to go. Line up these two hats here, click it back into place, and you're all done there you go, new battery. And you're ready to go. Thanks for watching.