When the key fob for your Mazda vehicle starts to malfunction, it’s likely that the battery needs to be replaced. Fortunately, changing the battery in a Mazda key fob is a relatively simple process that can be done at home with just a few basic tools. Keep reading below for step-by-step instructions on how to change the battery in your Mazda key fob., ensuring that your vehicle’s key fob remains in good working condition.
First, it’s important to gather the necessary tools and materials. To change the battery in a Mazda key fob, you will need a new CR2025 coin battery and a small flathead screwdriver or other similar tool. Once you have these items, you can begin the replacement process.
Begin by inserting the flathead screwdriver or other tool into the small notch on the back of the key fob. Carefully pry the back cover off the key fob, taking care not to damage the housing or internal components. Once the back cover is removed, you will see the battery compartment. Remove the old battery from the compartment and replace it with the new CR2025 coin battery, ensuring that the positive (+) side of the battery is facing up.
Identifying Your Mazda Key Fob
The first step in changing your Mazda key battery is to identify the type of key fob you have. Mazda has used various key fob designs over the years, so it’s important to know which one you have before you begin. Here are some tips for identifying your Mazda key fob:
- Look at the shape of the fob. Mazda key fobs come in a variety of shapes, including rectangular, oval, and square. The shape of the fob can help you narrow down the type of fob you have.
- Check the number of buttons on the fob. Mazda key fobs typically have two to four buttons. The number of buttons can help you identify the type of fob you have.
- Look for a Mazda logo on the fob. All Mazda key fobs have a Mazda logo on them. The location of the logo can vary depending on the type of fob you have.
Once you have identified the type of Mazda key fob you have, you can begin the process of changing the battery.
Here is a table summarizing the different types of Mazda key fobs and their corresponding battery types:
| Key Fob Type | Battery Type |
|---|---|
| Rectangular with two buttons | CR2025 |
| Oval with three buttons | CR2032 |
| Square with four buttons | CR2050 |
Gathering Necessary Tools
To replace the battery in your Mazda key, you’ll need the following tools:
- A new CR2025 3-volt battery
- A small screwdriver or key tool
Choose the Right Screwdriver
The type of screwdriver you need will depend on the model of your Mazda key. If your key has a small screw on the back, you’ll need a Phillips head screwdriver. If your key has a small hole on the side, you’ll need a key tool or a small flathead screwdriver.
| Key Model | Screwdriver Type |
|---|---|
| MAZDA3 (2019-present) | Phillips head screwdriver |
| MAZDA6 (2018-present) | Key tool or small flathead screwdriver |
| CX-5 (2017-present) | Phillips head screwdriver |
| CX-9 (2016-present) | Key tool or small flathead screwdriver |
Opening the Key Fob
The first step in changing the battery in a Mazda key fob is to open the fob. This can be done by following these steps:
1. Locate the small, flat button on the back or side of the key fob. This button is typically located near the metal loop that attaches the fob to your keychain.
2. Press the button and slide the front and back covers of the key fob apart.
3. Once the key fob is open, you will see a small, round battery. Remove the old battery and replace it with a new battery of the same type.
4. Close the key fob by pressing the front and back covers together until they snap into place.
Here are some additional tips for opening a Mazda key fob:
- If you have difficulty pressing the button on the back of the key fob, you can try using a small, flat object, such as a screwdriver or a coin.
- If the front and back covers of the key fob are stuck together, you can try wiggling them gently until they come apart.
- Be careful not to damage the key fob when opening it. The key fob is a delicate piece of equipment, and it can be easily damaged if it is not handled properly.
Inserting the New Battery
1. Slide the metal lever to the left, and then lift it up to release the old battery.
2. With the flathead screwdriver, gently pry the old battery out of its slot.
3. Align the positive (+) terminal of the new battery with the positive (+) terminal in the slot.
4. Carefully insert the new battery into the slot, ensuring that the terminals are correctly aligned.
Replacing the Key Shell
1. Insert the new battery into the key shell, aligning the positive (+) terminal with the positive (+) terminal in the shell.
2. Make sure that the battery is snugly fit in the shell.
3. Press the two halves of the key shell together until they snap securely into place.
Testing the Key Battery
1. Press the lock or unlock button on the key fob. The LED light should illuminate, indicating that the battery is working properly.
2. If the LED light does not illuminate, repeat the battery replacement steps or try a different battery.
Inserting the New Battery
1. Open the key fob by pressing the release button and pulling the two halves apart.
2. Locate the battery compartment. It is typically a small, square or rectangular compartment on the inside of the key fob.
3. Use a small, flat-head screwdriver or a key to pry open the battery compartment cover.
4. Remove the old battery from the compartment. It is typically a CR2025 or CR2032 coin-type battery.
5. Insert the new battery into the compartment with the positive (+) side facing up. Make sure the battery is firmly seated and does not move around.
Here’s a table summarizing the steps for inserting the new battery:
| Step | Action |
|—|—|
| 1 | Open the key fob by pressing the release button. |
| 2 | Locate the battery compartment on the inside of the key fob. |
| 3 | Pry open the battery compartment cover using a small, flat-head screwdriver or a key. |
| 4 | Remove the old battery from the compartment. |
| 5 | Insert the new battery into the compartment with the positive (+) side facing up. |
6. Replace the battery compartment cover and snap it into place.
7. Close the two halves of the key fob and press the release button to lock it.
Closing the Key Fob
Now that you have replaced the battery in your Mazda key fob, it’s time to close it up and ensure it’s secure.
- Check the Battery Orientation: Double-check that the new battery is facing the right way in the slot before closing the key fob.
- Align the Key: Slide the metal key blade back into the fob, aligning it properly.
- Press the Buttons: Gently press any of the buttons on the key fob to verify that they are functioning correctly.
- Snap the Back Panel: Carefully align the back panel over the key fob and press down firmly until it clicks into place, securing the key fob together.
- Test the Fob: Use the key fob to unlock and lock your car, ensuring that the buttons work as intended.
- Keep the Battery Handy: Keep a spare battery on hand for future replacements, as the battery may need to be changed again in the future.
By following these detailed steps, you can successfully change the battery in your Mazda key fob and confidently close it back up, ensuring a secure and functioning device.
| Step | Action |
|---|---|
| 1 | Lock and unlock your car to test the fob. |
| 2 | If the fob is not working, recheck the battery orientation and try again. |
| 3 | Store a spare battery in your glovebox or vehicle for future replacements. |
Testing the New Battery
Once you have replaced the battery, it’s important to test it to make sure it’s working properly. Here are the steps on how to test the new battery:
- Press the lock button on the key fob to lock your car.
- Walk away from your car for about 20 feet.
- Press the unlock button on the key fob to unlock your car.
- If the car unlocks, then the new battery is working properly.
- If the car does not unlock, then the new battery may not be installed correctly. Repeat steps 2-4 to make sure the battery is installed correctly.
- If the car still does not unlock, then the new battery may be defective. Try replacing the battery with a new one.
- If you are still having problems, consult your Mazda dealer for assistance.
| Symptom | Possible Cause |
|---|---|
| The key fob does not work. | The battery may be dead. |
| The key fob works intermittently. | The battery may be weak. |
| The key fob works, but the range is limited. | The battery may be weak. |
Replacing the Battery
1. Locate the key fob’s battery compartment. Usually, it’s on the back or side of the fob.
2. Use a small flat-head screwdriver or a key to gently pry open the compartment.
3. Remove the old battery and insert the new one with the positive (+) side facing up.
4. Push the battery compartment back into place.
5. Test the key fob to ensure it’s working correctly.
Reprogramming the Key Fob (If Required)
In some cases, you may need to reprogram the key fob after replacing the battery. Here’s how to do it:
- Insert the key into the ignition and turn it to the “ON” position (do not start the engine).
- Within 10 seconds, press and hold the unlock button on the key fob for 10 seconds.
- Release the unlock button and wait for the security light on the dashboard to stop flashing.
- Repeat steps 2-3 for the other key fob (if you have one).
- Turn the key to the “OFF” position to complete the programming.
| Battery Type for Mazda Key Fobs | Models |
|---|---|
| CR2025 | Mazda3 (2004-2018), Mazda6 (2003-2018), Mazda CX-5 (2013-2022), Mazda CX-7 (2007-2012) |
| CR2032 | Mazda2 (2011-2022), Mazda5 (2011-2015), Mazda CX-9 (2007-2022), Mazda MX-5 Miata (2016-2022) |
Troubleshooting Common Issues
Key Not Responding
If your key fob is not responding, try the following:
– Check if the battery is still charged.
– Clean the battery contacts on the key fob and in the vehicle.
– Hold the key fob close to the steering column to enhance signal strength.
– If the issue persists, replace the battery or have the key fob inspected by a Mazda dealership.
Key Programming Failure
If you’re experiencing difficulties programming your new key fob, consider the following:
– Ensure you’re following the correct programming instructions for your specific Mazda model.
– Check if the programming mode has been activated correctly.
– Verify that the new key fob is compatible with your vehicle.
– Contact a Mazda dealership if the programming failure persists after multiple attempts.
Remote Starting Not Functioning
When the remote start feature is malfunctioning, consider the following:
– Ensure your key fob’s battery is fully charged.
– Check if the vehicle is in park and all doors are closed.
– Make sure the engine start/stop button is not pressed.
– Verify that the key fob is within range and facing the vehicle.
– If the issue persists, refer to your Mazda owner’s manual or consult a Mazda dealership for further assistance.
Key Stuck in Ignition
If your key is stuck in the ignition, try the following:
– Ensure the vehicle is in park and the steering wheel is unlocked.
– Gently wiggle the key while turning it.
– If the key remains stuck, use a key lubricant to help release the mechanism.
– If the issue persists, contact a Mazda dealership for professional assistance.
Battery Draining Too Quickly
If your key fob’s battery is draining too quickly, consider the following:
– Replace the battery with a fresh one.
– Check for any loose connections or damage to the key fob.
– Disable any unnecessary key fob features, such as the panic button or remote start.
– If the battery continues to drain rapidly, have the key fob inspected by a Mazda dealership.
Maintaining Your Mazda Key Fob Battery
1. Gather Your Tools and Materials
You’ll need a new CR2025 or CR2032 battery, a small Phillips head screwdriver, and a piece of cloth or tissue.
2. Locate the Key Fob Battery
Usually, the battery is located inside the key fob itself. Look for a small, round compartment on the fob.
3. Insert the Screwdriver
Carefully insert the small Phillips head screwdriver into the screw hole of the battery compartment.
4. Remove the Screw
Gently twist the screwdriver clockwise to remove the screw.
5. Open the Battery Compartment
Once the screw is removed, the battery compartment should pop open. Use a piece of cloth or tissue to gently pry it open if it doesn’t open easily.
6. Remove the Old Battery
Using a small piece of cloth or tissue, gently lift the old battery out of the compartment.
7. Insert the New Battery
Orient the new battery with the positive (+) side facing up. Gently press it into place.
8. Close the Battery Compartment
Close the battery compartment and align the screw hole.
9. Tighten the Screw
Use the screwdriver to gently tighten the screw back into place.
10. Test the Key Fob
Press a button on the key fob to make sure it’s working properly. If it’s not, repeat the steps above and make sure the battery is inserted correctly.
| Battery Type | Replacement Interval |
|---|---|
| CR2025 | Every 2-3 years |
| CR2032 | Every 4-5 years |
Tips
- Replace the battery as soon as the key fob starts to show signs of weakening, such as reduced range or delayed response.
- If you’re not comfortable changing the battery yourself, you can have it done at a Mazda dealership or a local locksmith.
- Keep spare batteries in your car in case the key fob battery dies unexpectedly.
How to Change a Mazda Key Battery
If your Mazda key fob is no longer working correctly, it may be time to change the battery. The battery in a Mazda key fob typically lasts for about two years, but it can vary depending on how often you use the key fob and the type of battery it uses. Changing the battery in a Mazda key fob is a simple process that can be completed in just a few minutes.
To change the battery in a Mazda key fob, you will need a new CR2025 battery and a small Phillips head screwdriver. Once you have the necessary tools, follow these steps:
- Locate the small screw on the back of the key fob and remove it using the Phillips head screwdriver.
- Carefully pry open the two halves of the key fob.
- Remove the old battery and insert the new battery, making sure that the positive (+) side of the battery is facing up.
- Snap the two halves of the key fob back together and tighten the screw.
- Test the key fob to make sure it is working correctly.
People Also Ask About How to Change Mazda Key Battery
How do I know if my Mazda key battery needs to be replaced?
There are a few signs that may indicate that your Mazda key battery needs to be replaced. These signs include:
- The key fob is not working correctly.
- The key fob is not able to unlock or lock the doors.
- The key fob is not able to start the car.
What type of battery does a Mazda key fob use?
Mazda key fobs typically use a CR2025 battery.
How often should I change the battery in my Mazda key fob?
The battery in a Mazda key fob typically lasts for about two years, but it can vary depending on how often you use the key fob and the type of battery it uses.
