Mazda Key Fob Batteries & How to Replace Them

Mazda is a Japanese carmaker. Currently, the company produces over a million vehicles a year, the majority of which use key fob remotes. If you find yourself with a non-working key fob, maybe it’s time to change its battery. Luckily, this can be done at home, for cheap.

Right below, you can find your key fob by clicking on your Mazda model. This will take you to a full guide on DIY battery replacement for that model. Scroll down to see a chart with all of the key fob types, their years, and the batteries they take. All the way down, you can find full video tutorials for each key fob type Mazda has to offer.

Mazda Sedan & Hatchback Models

  • Mazda 2
  • Mazda 3
  • Mazda 6 hatchback
  • Mazda 6 sedan

Mazda Sports Car Models

Mazda Crossover & SUV Models

Mazda Minivan & Wagon Models

Mazda Truck Models

  • Mazda B-Series Truck
  • Mazda Tribute

Key Fob Remotes

  • Smart Key – Battery: CR2025
  • Flip Key – Battery: CR1620
  • Rectangular Key – Battery: CR2025
  • Rounded Key – Battery: CR2025
  • Square Key – Battery: CR2032
Smart2009 – PresentCR2025 Check on Amazon
Flip2006 – 2015CR1620 Check on Amazon
Rectangular2003 – 2008CR2025 Check on Amazon
Rounded2003 – 2005CR2025 Check on Amazon
Square1998 – 2009CR2032 Check on Amazon

How to change the battery in the smart Mazda key fob

Mazda CX-9 Smart Key Fob Battery Replacement (2016 - 2019)
Check Price on Amazon

How to change the battery in the flip Mazda key fob

Mazda MX-5 Miata Flip Key Fob Battery Replacement (2006 - 2015)
Check Price on Amazon

How to change the battery in the rectangular Mazda key fob

Mazda 6 Hatchback Rectangular Key Fob Battery Replacement (2003 - 2005)
Check Price on Amazon

How to change the battery in the rounded Mazda key fob

Mazda 6 Sedan Rounded Key Fob Battery Replacement (2003 - 2005)
Check Price on Amazon

How to change the battery in the square Mazda key fob

Mazda Tribute Square Key Fob Battery Replacement (2001 - 2007)

Check Price on Amazon

Mazda Parts

Find parts for your Mazda:

  • mazda transmission control module

Frequently Asked Questions

What battery goes in my Mazda key?
The battery for your key depends on the type of key fob. Scroll up to the chart to see which one you have. The most common Mazda key batteries are 3v coin batteries like the: CR2025, CR2032, and CR1620.

Check Price on Amazon

Check Price on Amazon

Check Price on Amazon

Where can I buy Mazda key fob batteries?
For the best prices, you can buy these batteries on Amazon. The battery you need will ship right to your front door—no shopping around hardware stores required. Here are all of the batteries used in Mazda key fobs—just find what battery you need in the chart above and click a link to buy it on amazon: CR2025 battery, CR1620 battery, CR2032 battery.

Check Price on Amazon

Check Price on Amazon

Check Price on Amazon

How much does it cost to replace a Mazda car key?
If your battery died, it will only cost you a few bucks to order a new one and replace it at home. However, if you lost your key fob and need a new one, it can get pricey. Some Mazda keys must be programmed at a Mazda dealership. This process may cost a few hundred dollars depending on your specific key fob. Some Mazda key fobs can be programmed at home for free.

How do you change the battery in a 2016 Mazda key fob?
It depends on what key fob you have. Some years have many different key fobs in use at the same time, there is no one correct answer. See our table above with pictures of every fob type to find your specific device. If you have a 2016 Mazda, you most likely are using the “smart” key fob. This uses a CR2025 battery. Scroll up to see a full video tutorial on the “smart” key DIY battery replacement.

Check Price on Amazon


Mazda Key Fobs — Everything You Need to Know

Losing a Mazda fob or dealing with a broken one can be a stressful situation. Thankfully, it’s easy to replace your remote at short notice.

Read on for more information about the process and your options for getting a new Mazda key.

Types of Mazda Keys Available

The type of Mazda fob you can buy depends on the model and year of your vehicle.

For example, a 2021 Mazda CX-5 is likely to use advanced technology and be compatible with keyless entry. However, if you have a car from many decades ago, it will likely need a traditional blade.

The main types of Mazda key available are:

Transponder Key

If your Mazda model is older than 2021, you may find that you need this type of fob to open your car. The price of this option is usually lower than that of a Mazda key fob.

Even though this remote does not have the same button functions as other fobs, it is still useful. You insert it into your side door lock, and it allows you to enter your vehicle.

Keyless Entry Remote

A keyless entry remote opens your car through the process of pushing a button. As well as the ability to unlock, it can contain other tools like a panic alarm. Just press the button to call for help.

Some keyless entry remotes also come with an emergency replacement transponder key. Even if your remote technology goes dead, you are still able to enter your vehicle. Just remove the key and insert it to unlock.

Intelligent Smart Key Remote

An intelligent smart key remote is similar to a keyless entry remote. However, the advanced technology allows you not just to unlock but start your Mazda.

The price of this kind of key will be slightly more than the other options. It usually works with more advanced cars, like a 2021 Mazda CX-5.

If you’re unsure which remotes are compatible with your vehicle, you should contact your local Mazda dealer.

They will likely tell you to “call us” and provide you with detailed information about your car and its parts.


All fobs have some common qualities:

  • Safe: Programmed to work only with your car.
  • Lightweight: Easy to carry around in your bag or pocket.
  • Accessible: Straightforward and easy to use.
  • Reliable: These items last for a long time.

To have continued access to these benefits, you should purchase a replacement at your earliest convenience. You can either search online for help or visit the address of a top car parts specialist in your area.

Frequently Asked Questions

It’s natural to have questions when shopping for parts for vehicles.

Before purchasing any vehicle service or product, check with an automotive dealer or shop. They can help you to better understand the price and steps involved in purchasing these things.

Here are a few different things you should also keep in mind:

How Long Does a Mazda Key Fob Battery Last?

A Mazda key fob battery lasts for a long time before you have to replace it. Mazda state that the key fob battery will usually last one to two years before you need to get a change.

Therefore, if you purchase a Mazda key fob battery in 2021, it would not be flat until several years later.

Check Price on Amazon

How Much Does It Cost to Replace a Mazda Key Fob?

A range of factors can influence the cost:


The cost of a complex key for a 2021 Mazda CX-5 will be more than a more simple key from back in the 1980s.


If you live in a place when Mazda cars are common, they will likely be easier to find and cheaper.


Buying in bulk can start to decrease the price. If you choose to purchase more than one Mazda key at a time, the dealer may remove some costs.

New Mazda fobs vary in price. However, as it’s 2021, it’s easy to search online and compare exact prices.

How Do I Get A Replacement Key Fob For My Mazda?

You can easily get a replacement by contacting your local dealer. They will advise you on what to purchase.

If you prefer, you can purchase keys online. However, make sure that any service you use is reliable.

How Do You Program A Mazda Key Fob?

If you get a replacement key that only makes your car door open, you may be able to program it yourself. However, you should only attempt the DIY route if you have experience programming and fitting automotive parts.

You will need specialist equipment like an extra-small screwdriver, and there is a risk that it will cause new issues to the Mazda key. The price of having your replacement professionally programmed is low, and it is an easier process.

If your Mazda replacement key is of a type that can start your car when you are near it, you should not program it yourself.

Instead, speak to a dealer or professional service. The types of screwdriver and other equipment needed are too complex to attempt it yourself.

Can You Start a Mazda Without the Fob?

If your car has a traditional ignition slot, you can start it with the metal blade. However, because the metal blade is likely in your lost fob, you may be stuck.

Pros and Cons

As is the case with any purchase, there are pros and cons of a Mazda fob. Read on for each side of the debate.


  • Small and Lightweight: The key features a smart design, smaller than your phone, and easy to carry.
  • Multiple Uses: The new key fobs have a range of great features, perfect for 2021. Easily open your boot or call for help without using your phone.
  • Easy To Use: These items make your car accessible. Open and drive it easily.


  • Accidental Activation: This can take place if you accidentally press the button while in the area near your Mazda. A case or cover can help to sort this problem.
  • Price of Programming: After you get a fob, you need to follow this by programming it. The service can make the price increase.

Verdict: Should You Buy A Mazda Key Fob?

A Mazda key is a great option if you want to replace a dead or lost key. At the press of a button, you can open your car and save time and money.

You should contact a professional Mazda service or dealer if you have questions that we didn’t cover.

The search for a Mazda automotive key doesn’t need to be stressful. You’ll find the perfect car key for a good price in no time.