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How do you change a Mazda CX-5 key battery?

The batteries in my car key fob must have died, because I can’t get it to do anything anymore. I need to replace the batteries so the fob works again. How do you change a Mazda CX-5 key battery?

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Payton Ternus · Updated on
Reviewed by Shannon Martin, Licensed Insurance Agent.
Key fobs are great to have, but the batteries can be an inconvenience when they stop working.
Here is what you need to do to change a
Mazda CX-5
key battery:
  • Press the auxiliary key button on the back of the fob to take out the metal auxiliary key
  • Carefully pry open the fob case with a flathead screwdriver, starting from one of the side slots and working your way around slowly
  • Remove the case and keep it in a clean, dry space
  • Remove the battery cap and battery without damaging the rubber ring
  • Insert new battery negative side down, replace the battery cover, fix the sides of the fob case, and re-insert the auxiliary key
That’s it! Now you know how to change the key battery, but what about finding affordable
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