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 TouringFACTORY OEM SERVICE PROCEDURE

No.3 Keyless Entry Remote Transmitter Id Code Cannot Be Reprogrammed: Notes

3	Keyless entry remote transmitter ID code cannot be reprogrammed
DESCRIPTION	Malfunction in BCM circuit, or keyless receive circuit.
POSSIBLE CAUSE	Malfunction in keyless receiver Keyless receiver malfunction Keyless receiver power supply fuse malfunction Malfunction in wiring harness between keyless receiver and ground Malfunction in wiring harness between keyless receiver and BCM Malfunction in wiring harness between keyless receiver power supply fuses and keyless receiver Malfunction in BCM Malfunction in wiring harness between keyless receiver and BCM Malfunction in BCM

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.