Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSMAZDA20113 MAZDASPEED, 2.3 3REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 586 (SECURITY SYSTEM AND LOCKS SYSTEM)TRANSMITTER DISASSEMBLY/ASSEMBLY

2011 Mazda 3 Mazdaspeed, 2.3 3

Transmitter Disassembly/Assembly

2011 Mazda 3 Mazdaspeed, 2.3 3SECTION Transmitter Disassembly/Assembly

WARNING: This page is about a different car, the 2010 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.

Insert a flathead screwdriver into the transmitter notch and remove the key from the transmitter by pressing the tab.

Fig 1: Removing Key From Transmitter
Courtesy of MAZDA MOTORS CORP.
Insert a flathead screwdriver into the transmitter notch and open the transmitter.

Fig 2: Inserting Flathead Screwdriver Into Transmitter Notch
Courtesy of MAZDA MOTORS CORP.
Remove the battery by pressing it in the direction of the arrow shown in the figure.

Fig 3: Removing Battery
Courtesy of MAZDA MOTORS CORP.
Install the new battery (CR1620) with the plus pole facing down.
Align the upper and lower covers and close the transmitter.
Battery type

Lithium battery CR1620

Battery life

Approx. 2 years (when used approx. 10 times/day)

Fig 4: Installing Battery (CR1620) With Plus Pole Facing Down
Courtesy of MAZDA MOTORS CORP.
Install the key to the transmitter.
NOTE:
- When connecting the key to the transmitter, grip the key and the transmitter as shown in the figure and connect until a click sound is heard.
- If the key is not completely connected to the transmitter, they may come apart.
  
  Fig 5: Installing Key To Transmitter
  Courtesy of MAZDA MOTORS CORP.

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.