The addition of the technology is designed to cut down on heat-related injuries and deaths.
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Hyundai will fit 'rear occupant alerts' as standard across its North American range from 2022 onwards, as it looks to cut the number of kids left in hot cars.

The announcement was made on National Heatstroke Awareness Day in the USA, and follows a similar move from Nissan.

Debuted in the Santa Fe, the rear-seat reminder system knows whether the back doors were opened before the car was started, and reminds the driver to check the rear seats when the car is turned off again.

A more sophisticated system is currently optional in the USA, too. An ultrasonic sensor in the rear of the car is able to detect movement in the back seats after the driver has left the car, and honks the horn to warn the driver there's some precious cargo still on board.

The system will also be able to send a message to the driver's phone using the Blue Link app.

Australia

Hyundai Australia is looking into making a similar move, but says it's "too early to confirm" if the technology will be made standard locally.

Children and animals being left in hot cars is a serious problem locally, with more than 5000 unattended children rescued from Australian vehicles annually.