Understanding the Mazda CX-5 key fob battery size is essential for any owner who wants to avoid being locked out of their vehicle. The specific type of battery used in the key fob dictates the longevity of the device and ensures the remote entry system functions without interruption. While the process of changing the battery is straightforward, using the wrong size can lead to improper fitting or damage to the key fob casing.
Identifying the Correct Battery Model
Mazda typically utilizes a standard coin cell battery across most of their key fob models for the CX-5. The specific designation you need to look for is generally CR2032. This number refers to the battery's dimensions and voltage, where "20" indicates the diameter in millimeters and "32" represents the thickness in hundredths of a millimeter. Confirming this size matches the one specified in your vehicle's manual is the first step in maintaining your keyless entry system.
Physical Characteristics and Specifications
The CR2032 battery is a lithium manganese dioxide coin cell that provides a stable 3-volt output. This power level is necessary to transmit the radio frequency signal to the car's receiver. Visually, it is a small, circular battery with a distinct positive side, often marked with a plus sign. Its design allows it to fit securely into the key fob's compartment without requiring additional fasteners.
Step-by-Step Replacement Process
Replacing the Mazda CX-5 key fob battery is a task that can be completed in minutes with minimal tools. The key fob is designed to be disassembled without the need for specialized equipment, although using a small screwdriver can help if the clips are tight. The process involves locating the seam of the fob and carefully prying it open to access the battery tray.
Tools You Will Need
New CR2032 battery
Small flathead screwdriver or coin
Soft cloth to protect the fob
Tweezers (optional, for handling the old battery)
Procedure and Precautions
Begin by locating the small slot on the side of the key fob. Insert the screwdriver or coin into this slot and apply gentle pressure to separate the two halves of the fob. Once open, you will see the old battery secured in a plastic holder. Note the orientation of the old battery before removing it, as the new battery must be inserted in the same direction to function correctly. After replacing the battery, press the two halves of the fob back together until you hear a distinct click, indicating that the internal contacts are aligned.
