If your Mazda CX-5 key fob starts to lose range or stops working entirely, it’s likely time to replace the battery. Changing the key fob battery is a simple process that you can do at home in just a few minutes. This guide will walk you through the steps to ensure your key fob is back in working condition quickly.
Step-by-Step Guide: How to Change the Battery in a Mazda CX-5 Key Fob
1. Gather the Necessary Tools
Before you begin, you’ll need the following:
- A replacement battery: CR2025 lithium coin battery (check your owner’s manual to confirm the specific battery for your model year).
- A small flathead screwdriver or similar tool (a plastic pry tool is ideal to avoid scratching the key fob).
2. Open the Key Fob Case
Follow these steps to open the key fob:
- Locate the small switch or latch on the back of the key fob and slide it to release the physical key. Pull the key out.
- Look for a notch or groove where the physical key was housed. Insert the flathead screwdriver or pry tool into the notch.
- Gently twist or pry the tool to separate the two halves of the key fob. Work slowly to avoid damaging the plastic casing.
3. Remove the Old Battery
Once the key fob is open:
- Identify the round battery in the circuit board.
- Use your flathead screwdriver or fingernail to carefully pop the old battery out of its compartment.
- Take note of the battery’s orientation (positive side up or down) before removing it.
4. Insert the New Battery
- Take your new CR2025 battery and align it in the same orientation as the old one.
- Press the battery firmly into place, ensuring it is secure and properly seated.
5. Reassemble the Key Fob
- Line up the two halves of the key fob case.
- Press them together firmly until you hear or feel a click, indicating they are securely snapped back together.
- Insert the physical key back into its slot.
6. Test the Key Fob
Once reassembled, test your key fob to ensure the new battery is working:
- Stand near your Mazda CX-5 and press the lock or unlock button.
- Check other functions, such as opening the trunk or activating the panic button.
If the key fob doesn’t respond, double-check that the battery is properly seated and oriented correctly. If issues persist, the fob itself may need professional repair or replacement.
How Often Should You Change the Battery?
Key fob batteries typically last 2–3 years, depending on usage. If you notice decreased range or intermittent functionality, it’s a good idea to replace the battery before it completely fails.
Tips for Maintaining Your Mazda CX-5 Key Fob
- Avoid Prolonged Button Presses: Unintentional button presses, such as those caused by keeping the fob in a tight pocket or bag, can drain the battery faster.
- Keep the Fob Dry: Avoid exposing the key fob to moisture or extreme temperatures, as this can damage its internal components.
- Carry a Spare Battery: Keeping a spare CR2025 battery on hand ensures you can quickly replace it in an emergency.
When to Seek Professional Help
If replacing the battery doesn’t fix the issue, or if your key fob case is damaged, visit a professional Mazda service center. The technicians at Marin Mazda can assist with key fob repairs or replacements and ensure your Mazda CX-5 key fob is functioning perfectly.
Changing the battery in your Mazda CX-5 key fob is a straightforward task that saves time and money compared to visiting a dealership. By following these steps, you’ll keep your key fob working reliably for years to come.
