Programming Instructions for 2020 Mazda CX-3 Smart Key Remote Fob

Important Notice: The 2020 Mazda CX-3 does not support on-board programming for smart key remote fobs. All programming must be completed using advanced diagnostic equipment by a trained automotive technician.

Programming Procedure:

• Step 1: Verify that the new smart key fob is compatible with the 2020 Mazda CX-3 and is not currently programmed to another vehicle.
• Step 2: Gather any working remote fobs. Depending on the vehicle system, all remotes may need to be present during programming.
• Step 3: Schedule an appointment with a certified technician or automotive service provider experienced in keyless entry and smart key programming.
• Step 4: If your vehicle is operable, driving it to the technician’s location may help minimize service costs compared to requesting mobile assistance.
• Step 5: Be prepared to present proof of vehicle ownership—such as your registration and a valid photo ID—before programming can begin.
• Step 6: The technician will connect specialized diagnostic tools to your vehicle’s onboard computer to initiate the smart key programming process.
• Step 7: During programming, the system may erase previously stored keys and register both the new and existing smart keys.
• Step 8: After setup is complete, the technician will test the key fob to ensure full functionality, including door locking/unlocking, proximity entry, and push-button start.
• Step 9: Ask the technician to confirm the number of remotes currently registered to your vehicle to ensure no unauthorized devices are active.
• Step 10: Safely store any spare remotes and test all keys periodically to confirm continued functionality.