3 Easy Steps: How to Change a Mazda Key Fob Battery

Mazda key fob
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When your Mazda key fob starts to act up, it’s usually a sign that the battery is running low. Replacing the battery is a quick and easy process that you can do yourself. Here’s a step-by-step guide on how to change a Mazda key fob battery:

First, you’ll need to gather a few tools. You’ll need a small Phillips head screwdriver, a new CR-2025 battery, and a clean cloth. Once you have your tools, you can start the process of replacing the battery. Start by removing the screw that is located on the back of the key fob. Once the screw is removed, you can carefully pry the two halves of the key fob apart.

Next, you’ll need to locate the battery. The battery is usually held in place by a small clip. Use the screwdriver to carefully remove the clip and then lift the battery out of the key fob. Once the old battery is removed, you can insert the new battery into the key fob. Make sure that the positive side of the battery is facing up. Once the new battery is in place, you can reattach the clip and then put the two halves of the key fob back together. Finally, tighten the screw to secure the key fob.

Gathering Necessary Tools

Replacing a Mazda key fob battery is a straightforward procedure that requires minimal tools. Here’s a detailed guide on what you’ll need:

Phillips-Head Screwdriver

A small Phillips-head screwdriver is essential for opening the key fob casing. Most household screwdriver sets include a suitable size for this task. Ensure that the screwdriver fits snugly into the screw slots to avoid stripping or damaging the screws.

New Battery

Before starting the replacement process, ensure you have a compatible new battery. Refer to the owner’s manual or the existing battery for the correct type. Common battery sizes for Mazda key fobs include CR2025 or CR2032.

Key Fob Model	Battery Type
Mazda3 (2014-2018)	CR2025
Mazda6 (2013-2018)	CR2032
CX-5 (2013-2018)	CR2025

Optional Tools

While not strictly necessary, the following tools can make the process easier or safer:

Tweezers: To remove small components or hold the battery in place.
Gloves: To protect your hands from battery acid.
Safety glasses: To prevent eye irritation from battery acid.

Accessing the Battery Compartment

1. Identify the type of key fob you have. There are two main types of Mazda key fobs: those with a removable blade key and those without. If your key fob has a removable blade key, you will need to insert the key into the slot on the back of the fob and push down to release the cover. If your key fob does not have a removable blade key, you will need to use a small screwdriver or other thin object to pry open the cover.

2. Once the cover is open, you will see the battery compartment. The battery is usually held in place by a small clip or spring. Use your fingernail or a small tool to gently pry the battery out of the compartment.

3. Before you replace the battery, make sure to clean the battery contacts. You can do this with a cotton swab dipped in rubbing alcohol or a pencil eraser. This will help to ensure a good electrical connection. Once the contacts are clean, insert the new battery into the compartment, making sure that the positive (+) and negative (-) terminals are aligned correctly. Finally, snap the cover back into place.

Removing the Old Battery

Step 4: Use a small screwdriver or a pointed object (e.g., a paperclip or toothpick) to gently pry open the battery compartment. Here’s a step-by-step guide to help you pry open the battery compartment using different tools:

Using a Small Screwdriver

Locate the small notch or indentation on the battery compartment.
Insert the screwdriver’s tip into the notch.
Gently pry open the compartment by twisting the screwdriver slightly.
Be careful not to damage the compartment or its components.

Using a Paperclip or Toothpick

Straighten out a paperclip or toothpick.
Insert the straightened paperclip or toothpick into the notch on the battery compartment.
Apply gentle pressure to pry open the compartment.
Avoid using excessive force to prevent damage.

Tool	Method
Small Screwdriver	Insert the screwdriver’s tip into the notch and twist to pry open.
Paperclip or Toothpick	Straighten the tool and insert it into the notch, applying gentle pressure to pry open.

Professional Assistance Considerations

If you encounter difficulties or prefer professional assistance, you can consider the following options:

Authorized Mazda Dealership

Visiting an authorized Mazda dealership is the most reliable option. They have trained technicians and genuine Mazda key fobs, ensuring proper installation and compatibility.

Local Locksmith

Local locksmiths who specialize in automotive services may also assist with key fob battery replacement. However, verify their skills and ensure they have experience with Mazda vehicles.

Online Services

Several online services offer key fob battery replacement kits. These kits typically include the new battery, instructions, and necessary tools. However, ensure you thoroughly read and understand the instructions before attempting the replacement yourself.

DIY Precautions

If opting for a DIY approach, follow these precautions:

Gather the necessary tools: a small flathead screwdriver or a coin.
Locate the key release button on the side of the key fob.
Use the tool to gently press the release button and separate the key and fob.
Turn over the fob and locate the small screw or latch that holds the battery cover in place.
Unscrew the screw or unlatch the cover.
Remove the old battery and replace it with the new one, ensuring correct polarity.
Reattach the battery cover and screw it in place.
Reassemble the key fob and key.
Test the key fob to ensure it functions properly.

Safety Precautions

Park the vehicle in a safe location: Ensure the car is on a flat and stable surface before beginning.
Turn off the engine: This will prevent any electrical issues while you’re working on the key fob.
Locate the key fob battery: Refer to your Mazda owner’s manual for the specific location of your vehicle’s key fob battery.
Wear protective gloves: Batteries contain chemicals that can be harmful to your skin. Always wear gloves to protect yourself from potential exposure.
Use a non-conductive tool: Avoid using tools that can conduct electricity, as this could cause a short circuit or damage to the key fob.
Dispose of the old battery properly: Battery disposal regulations vary depending on your location. Check local guidelines and dispose of the old battery safely and responsibly.
Avoid touching the circuit board: The circuit board within the key fob is delicate and can be damaged if handled improperly.
Use a fresh battery: Always use a new, high-quality battery for optimal performance and longevity.
Clean the battery contacts: Before inserting the new battery, use a clean cloth or cotton swab dipped in isopropyl alcohol to clean the battery contacts in the key fob.
Follow the correct polarity: Ensure that the positive (+) and negative (-) terminals of the new battery match the corresponding symbols in the key fob. Incorrect polarity can damage the key fob or the battery.

How To Change A Mazda Key Fob Battery

The Mazda key fob is a small, handheld device that allows you to lock and unlock your car, as well as open the trunk and panic alarm. The key fob battery powers these functions, so it is important to replace it when it dies. Here are the steps on how to change a Mazda key fob battery:

Locate the key fob battery. The battery is usually located in a small compartment on the back of the key fob. To open the compartment, use a small screwdriver or coin to pry it open.
Remove the old battery. Once the compartment is open, you can remove the old battery by gently prying it out with a small screwdriver or coin.
Insert the new battery. Take the new battery and insert it into the compartment. Make sure that the positive (+) and negative (-) terminals of the battery are facing the correct way.
Close the compartment. Once the new battery is inserted, close the compartment and snap it shut.
Test the key fob. Once the compartment is closed, test the key fob to make sure it is working properly. Lock and unlock your car, open the trunk, and press the panic alarm button to make sure everything is working correctly.