Mazda 3 flashing security light issue with inquiry on reflash solution on Mazda 3

Some Mazda 3 owners report experiencing concerns with a flashing security light, which can indicate various issues. The security indicator light typically flashes every 2 seconds when the ignition is switched off, and it should illuminate for about 3 seconds at startup before turning off to indicate successful deactivation of the immobilizer system. However, if the light continues to flash after the vehicle is turned off, it may signal a malfunction, potentially related to the electric parking brake (EPB). Additionally, some owners note that the light may flash even when the car is parked and the ignition is off, which could be normal behavior. If the security indicator light remains illuminated or flashing when attempting to start the engine with the correct key, it is crucial to ensure the key is within the operational range for signal transmission. For persistent issues, consulting an expert repairer, preferably an Authorized Mazda Repairer, is recommended to accurately diagnose the cause of the flashing light, as reflashing the system may not be necessary if the issue stems from normal operation or a malfunction.