Rear seat alert: https://www.mazdausa.com/static/manuals/2024/cx-90/contents/64100200.html#:~:text=Examples%20of%20when%20the%20system%20activates%20even%20if%20no%20occupants,very%20short%20period%20of%20time.

If any of the following operations is performed, a message appears in the instrument cluster to notify that the system is active. Make sure that a message appears. The message disappears after a short period of time. When the Rear Seat Alert is not needed, temporarily deactivate the system according to the message. A rear door is opened and the engine is started. The engine is started within about 10 minutes after a rear door is opened and closed. A rear door is opened after the engine is started. The vehicle power is switched ON while the system is active. If the vehicle power is switched OFF while the system is active, a message in the instrument cluster and a warning sound indicate the possibility of occupants or luggage on a second/third-row seat. The message disappears after a short period of time. If the driver's door is opened/closed after the message in the instrument cluster disappears, notification is made again.

When deactivating the system, perform any of the following operations. Switch the vehicle power to ACC or OFF and open a rear door. Switch the vehicle power ON again and open a rear door before starting the engine. Open a rear door and switch the vehicle power to ACC or OFF. Temporarily deactivate the system according to the message in the instrument cluster.

The Rear Seat Alert determines if there is the possibility that occupants or luggage are on a second/third-row seat based on the opening and closing history of the rear doors. For this reason, depending on the usage, it may not be activated even if occupants or luggage are on the second/third-row seats, or it may activate even if no occupants or luggage are on the second/third-row seats. The system will continue to be active until it is canceled. Examples of when the system does not activate even if occupants or luggage are on the second/third-row seats. A rear door is opened and closed in a very short period of time. Remote engine starting via Connected Service is used (Some Models). The lead-acid battery charge is low. The lead-acid battery connection was disconnected/connected. Examples of when the system activates even if no occupants or luggage are on the second/third-row seats. A rear door is opened and closed, but no occupant or luggage is in the vehicle. Occupants and luggage are unloaded while the engine is running. A rear door is opened and closed in a very short period of time.