Battery Replacement for Mazda Key Fob

Your Mazda key fob features advanced automatic technology to lock, unlock, arm, and remote start your Mazda.

A key fob is so convenient that we often take it for granted as another part of our everyday travels. We seldom give such things that we use every day a thought until they stop working.

Besides the inconvenience of resorting to the old-fashioned key in the fob to open and lock your Mazda, a key fob rendered inoperable due to a flat battery is also a security risk.

Read on as we examine Mazda key fob battery replacement and tell tale signs that you need to change your key fob's battery.

How to Open Mazda Key Fob

If you don't know how to change the battery in your Mazdakey fob, our article provides an easy guide to opening the key fob and doing a battery replacement in your Mazda's key fob.

Whether you own a sporty two-seater Mazda MX-5 Miata or the latest large CX-90 SUV, opening the key fob is much the same across all models.

First, remove the metal auxiliary key by pressing the auxiliary key button on the key fob to release it. With the key out of the way, you can see a slot on either side of the key fob case.

To gently pry open the two sides of the key fob casing, use a small flathead screwdriver wrapped in tape to prevent damage to the slots.

Battery Replacement in Mazda Key Fob

Mazda key fob battery replacement is not difficult at all. Just follow our step-by-step guide.

Step 1: Gather Your Tools

Be prepared, and have everything you need on hand.

Avoid opening the case and then running around looking for the new battery because that's when things go missing.

Most Mazda key fobs require a CR2025 or CR2032 lithium coin battery, so replacement batteries must be of the same type or equivalent.

Step 2: Open the Key Fob

Open the key fob in the manner we have learned above, ensuring all the parts are clean. It's recommended that the key fob be cleaned to prevent dirt from getting into the casing once it is opened.

Step 3: Remove the Old Battery

Mazda key fobs have a small removable battery cap to access the battery. Gently pry the cap off with the taped-up flathead screwdriver to remove it, being careful not to damage the small rubber 'O' ring seal.

The battery can then be removed with the help of your screwdriver if necessary.

Step 4: Insert the New Battery

Insert the new battery, ensure the positive pole faces up, and pop the battery cap back on without scratching or pinching the rubber seal.

Step 5: Reassemble the Key Fob

Reassemble the key fob by following the reverse opening procedure. Clip the two halves of the key fob case back together, replace the auxiliary key, and then check to see if your key fob is working as intended.

If the key fob does not operate as expected, double-check that the battery is properly seated with the seal and cap firmly in place and that the casing is correctly aligned and clipped together.

Signs Your Mazda Key Fob Battery Needs Replacement

Your Mazda key fob shouldn't suddenly stop working when the battery needs replacement. Thankfully, it's a gradual process with some sure signs to watch for, which means the battery is on its way out.

The green KEY indicator light flashes in the instrument cluster for about 30 seconds after turning the engine off.

The lock-unlock system does not operate, and the operation indicator light on the Mazda key fob transmitter doesn't flash when the buttons are pressed.

The locking or unlocking function only works when you are close to your Mazda, and a dying battery can also cause a delay or an inconsistent signal sent from your key fob to your Mazda.

Mazda owners are advised to replace the key fob battery as soon as these signs are detected.

Types of Mazda Key Fobs

Mazda makes use of varying types of key fobs across its different models, offering functions unique to a model's specifications. Some of these Mazda key fobs are:

Standard remotes with no special features
Flip key remote that features a remote with a key that flips out like a switchblade
The remote head comprises a remote with a key blade that sticks out and doesn't retract
Fobik keys are remotes with a key hidden inside that's not connected to the key fob
Smart keys are often used with push-to-start

Components of a Key Fob

Components normally found in your Mazda key fob, aside from the plastic and metal casing, include a microchip with a unique code stored that matches your car, the battery, and a transmitter that sends the microchip's code to your Mazda via an antenna that works with the radio transmitter to send a coded signal.

In your vehicle is a radio frequency identification chip to receive the signal and initiate the various actions like lock/unlock or arming of the security system.

Troubleshooting Common Issues

Suppose you replace the battery in your Mazda key fob, however the fob still continues to malfunction. In this case, it's time to seek help from a professional service center or, even better, a Mazda-authorized dealership.

When to Seek Professional Help

Replacing your Mazda key fob battery is a quick and cost-effective way to ensure your vehicle's keyless entry and start functions are always well-maintained and fully operational.

Battery replacement is not a difficult task for Mazda owners; however, anything beyond a simple key fob battery replacement should only be tackled by a professional.

Signs You Should Visit a Dealership

When your home-based key fob battery replacement doesn't work out and your problems persist, then it's time to visit a dealership for professional assistance.

Benefits of Professional Assistance

Booking your Mazda into an authorized Mazda service center means that your Mazda is given the best care, along with the peace of mind knowing that only genuine Mazda parts will be used that work perfectly.

Factory-trained Mazda technicians, along with advanced diagnostics and service expertise, ensure that any key fob issues will be sorted out professionally.

Get Your Mazda Serviced at Central Mazda

Central Mazda is a Mazda dealer in Plainfield, CT, and has a Genuine Mazda Service Center and Mazda-trained professional technicians who know your Mazda better than anyone else. We can also handle battery replacement in your Mazda key fob for you.

So, rely only on Central Mazda for the most convenient and thorough service experience possible.