Vehicle Questions and Answers
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The Mazda3 key fob in the 2016 model uses a CR2025 battery. Over time, you may encounter issues with the battery such as a cracked case, leaks, quick drainage, or total depletion of power. When this happens, the battery will need to be replaced. This component will eventually become ineffective and should be changed every 50,000 to 60,000 miles. Though it may require spending some money, it's necessary to keep your car operational.
The correct battery size for replacing the key fob in a 2016 Mazda 3 is the CR2025.