How to Test Your Mazda CX-5 Key Fob After Battery Replacement

Ever found yourself locked out of your Mazda CX-5 because the key fob battery died at the worst possible moment? Frustrating, right? But worry not, because in this article, you’ll discover a simple solution to this common dilemma.

Picture this: you’re running late for an important meeting, only to realize that your key fob is unresponsive. Sounds like a nightmare? Well, it doesn’t have to be. With just a few easy steps, you can replace the battery in your Mazda CX-5 key fob and get back on the road in no time.

By the end of this article, you’ll be equipped with the knowledge and confidence to tackle this task effortlessly. Say goodbye to the stress of dealing with a dead key fob battery – you’ll soon be a pro at changing it yourself.

Gather the Necessary Tools

To replace the battery in your Mazda CX-5 key fob, you’ll need a few basic tools. Here’s what you’ll need:

  • New CR2025 Battery: The key fob for your Mazda CX-5 typically uses a CR2025 battery.
  • Small Flathead Screwdriver: You’ll need this to open the key fob casing.
  • Precision Tweezers: These will help you remove the old battery without damaging the components inside.
  • Clean Cloth: Use a clean cloth to handle the components of the key fob to prevent any dirt or oil transfer.

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Don’t worry if you don’t have these tools on hand; you can easily find them at most hardware stores or online. Once you have everything ready, you’ll be all set to replace the battery in your Mazda CX-5 key fob.

Identify the Key Fob Model

To ensure you get the right battery for your Mazda CX-5 key fob, locate the model number on the back. Look for a series of letters and numbers that indicate the specific model. If you’re unsure, refer to the owner’s manual for guidance.

  • Different Mazda CX-5 key fob models may require different battery types. It’s essential to identify your specific model to avoid purchasing the wrong battery.
  • If the model number is faded or not easily readable, you can bring the key fob to a Mazda dealership. They can help identify the model and recommend the correct battery.

Remember, having the correct model number ensures a smooth and successful battery replacement process for your Mazda CX-5 key fob.

Open the Mazda CX-5 Key Fob

To begin changing the battery in your Mazda CX-5 key fob, you’ll need to open it up. Here’s how you can do it:

  • Locate the seam: Look for the small slot along the edge of your key fob.
  • Insert a tool: Using a flathead screwdriver or a coin, gently insert it into the slot.
  • Twist the tool: Turn the tool to separate the key fob’s two halves.
  • Be gentle: Take care not to damage the key fob or hurt yourself while opening it.
  • Separate the halves: Once you’ve twisted the tool, carefully pry the halves apart.

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By following these steps, you’ll successfully open up your Mazda CX-5 key fob and be one step closer to replacing the battery.

Replace the Battery

To replace the battery in your Mazda CX-5 key fob, follow these simple steps:

  • Step 1: Find the battery compartment in the key fob.
  • Step 2: Remove the old battery carefully to avoid damaging the key fob.
  • Step 3: Insert the new battery with the correct orientation.
  • Step 4: Ensure the battery is securely in place and the key fob closes properly.

Remember, regularly changing the battery in your Mazda CX-5 key fob can help prevent unexpected issues with remote locking and unlocking.

Key Points
Battery Replacement
Frequency Every 1-2 years
Battery Type CR2025 or CR2032
Approximate Cost $2-$5 per battery

Test the Key Fob

After replacing the battery in your Mazda CX-5 key fob, testing it is crucial to ensure everything is working smoothly and you can continue using it hassle-free.

  • Press the buttons on the key fob to check response.
  • Make sure the key fob successfully locks and unlocks the car.
  • Test the remote-start feature if your vehicle has it.

If the key fob doesn’t work, double-check the battery installation, or try replacing the battery again with a new one.

Key Points
Press buttons to test response
Ensure the key fob locks and unlocks the car
Test the remote-start feature


Now that you’ve replaced the battery in your Mazda CX-5 key fob, it’s crucial to test its functionality. Press the buttons, ensure it locks and unlocks your car, and test any remote-start features. If the key fob isn’t working, recheck the battery installation or try a new one. Taking these simple steps will help keep your key fob in optimal working condition, ensuring you have convenient access to your vehicle. Remember, regular maintenance of your key fob can save you time and hassle in the long run.

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Frequently Asked Questions

Is it necessary to test the Mazda CX-5 key fob after replacing the battery?

After replacing the battery, it is crucial to test the Mazda CX-5 key fob to ensure it functions properly. Press the buttons, check for response, confirm locking and unlocking the car, and if applicable, try the remote-start feature.

What should I do if the Mazda CX-5 key fob doesn’t work after battery replacement?

If the Mazda CX-5 key fob doesn’t work post-battery replacement, recheck the battery installation. If issues persist, try replacing the battery with a new one. Testing and confirming proper function are key after any battery replacements.

Battery industry professional with 5+ years of experience. Bachelor of Science in Electrical Engineering from Georgia Tech. Specializes in power systems and renewable energy.

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