How to Open Mazda Key Fob and Change Battery

2019 Mazda CX-3 Grand Touring

Imagine this. You're going about your day as usual. You wake up, have your morning coffee, and get ready for work. And then you head out to your Mazda CX-3 to start your drive.

But when you press the button on your key fob, the doors don't unlock. It's an inconvenience that doesn’t exactly set the mood for a great day. Fortunately, the issue is usually one that's fairly simple to fix—

A dead battery.

However, not everyone knows exactly how to open the key fob and change the Mazda 3 remote battery. So that's exactly what we’re here to teach you. 

Keep reading to find out everything you need to know about how to replace the Mazda 3 key fob battery for a quick fix that will help your Mazda last longer.

How Much Is a Mazda Key Fob?

First off, if you don't have a Mazda key fob, then you should certainly consider getting one. They're extremely convenient, allowing you to lock and unlock your vehicle without the key. It also allows you to start the vehicle remotely. 

And the good news is that, considering how long you’ll use it, it’s really not that expensive. A typical electronic key fob for a Mazda costs around $100.

That being said, most of us don't want to lay down $100 for a replacement key fob all the time. So it's helpful to know how to troubleshoot some typical problems.

But if you do happen to need a Mazda 3 key fob or replacement electronic key fob, keep reading to find out where you can get one.

Where Can I Get a Mazda Key Fob?

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You can actually find a Mazda key fob in several different places. There are several stores online that sell these electronic remotes. These range from businesses that specialize in key fobs to websites that offer multiple sellers.

But the best place to find a key fob is a Mazda dealership, where you’ll know the Mazda fob battery replacement is authentic. Come check out the Parts Center at Walker’s Renton Mazda.

You have plenty of options when it comes to replacing your key fob. Now let's get to the details about replacing the battery if your key fob stops working.

Related: Upgrade to Apple Car Play and Android Auto at Walker’s Renton Mazda

How to Open Mazda Key Fob

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The first thing you'll need to do in order to change your key fob battery is to open the Mazda key fob. It sounds easy, but this is one of the steps that actually throws people off. It's not apparent just by sight how the car remote opens. 

To open the key fob for replacing the battery, use the following steps:

  1. Prepare a small flat head screwdriver by wrapping tape around the head. This will prevent damage to your key fob, especially the rubber ring inside the battery compartment. If that gets damaged, you'll have to replace it.

  2. Look for the auxiliary key button on the back of the key fob. Press that button, and you'll be able to remove the metal auxiliary key. Go ahead and do that.

  3. Once the metal key is out of the way, you'll be able to see a slot on either side of the key fob case.

  4. Using the tape wrapped flat head screwdriver, pry open the case, first on one side, and then on the other. Again, be careful not to damage the key fob.

  5. Once the case is open, place the piece you pulled off somewhere you won't lose it while you continue with the steps for replacing the remote key battery. 

Mazda Key Fob Battery Replacement

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Now that your key fob is open, it should be relatively quick and easy to replace the Mazda key fob battery.

Here's how to change the battery in a Mazda key fob:

  1. Now that the Mazda key fob battery is fully exposed, you can simply pull it out. Note that there is a small rubber ring beneath the battery. Be careful not to damage it. 

  2. If the rubber ring is damaged, you'll need to replace it before you can put in a new battery.

  3. Place the replacement battery on top of the rubber ring inside the key fob. When you put it in, make sure the positive side with the plus sign faces up where you can see it.

  4. Finally, put the battery cover back on properly, and reattach both sides of the key fob case. You should press down on the case on both sides until you hear them click into place in the slots. 

And that's it. Pretty simple. 

Related: Walker’s Renton Mazda Parts Center

The Benefits of Owning a Mazda

2018 Mazda CX-5 Grand Touring

Mazdas are cars with a reputation for being durable and reliable, great for families that frequently leave for road trips or business owners traveling from place to place. If you're on the fence about getting one, there are plenty of benefits. For one thing, Mazdas handle the road incredibly well, as if you and the car are directly connected.

It is well-designed by engineering teams that communicate with each other about the various parts and systems, so that the design functions with synergy. 

They're also designed to be light, so it takes less power to make them accelerate just as quickly vehicles with higher horsepower. Most models have front-wheel drive, but perform just as well as all-wheel drive vehicles because of the design of the suspension system. 

If you’re thinking about buying a new or used Mazda, or if you currently own a Mazda with service needs, stop by Walker’s Renton Mazda today. 


Related: Can You Lease a Used Car?


Categories: Parts