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.
2012 Mazda 5 L4-2.5LFACTORY OEM SERVICE PROCEDURE
Keyless Entry Transmitter: Service and Repair
KEYLESS ENTRY REMOTE TRANSMITTER DISASSEMBLY/ASSEMBLY
1. Insert a flathead screwdriver into the notch of the keyless entry remote transmitter, and press the tab to remove the key from the keyless entry remote transmitter.
2. Insert a flathead screwdriver into the notch of the keyless entry remote transmitter and open it.
3. Remove the battery by pressing it in the direction of the arrow shown in the figure.
4. Install the new battery (CR1620) with the plus pole facing down.
5. Align the keyless entry remote transmitter cover and close.
Battery type
- Lithium battery CR1620
Battery life
- Approx. 2 years (when used approx. 10 times/day)
6. Install the key to the keyless entry remote transmitter.
CAUTION:
- If the key is not completely installed to the keyless entry remote transmitter, they may come apart. When connecting the key to the keyless entry remote transmitter, grip the key and the keyless entry remote transmitter until a click sound is heard.
Factory Service Tools
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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.
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