The Australasian New Car Assessment Program (ANCAP) concedes that while everyone makes mistakes, tragic accidents like that can easily be avoided with the fitment of vehicle safety systems that detect if a child has been left in the vehicle.
The toddler was found unconscious by paramedics in a Chester Hill home after reportedly being left in a hot vehicle last Sunday for an unknown amount of time.
Last December a similar tragedy occurred when a three-year-old girl was found semi-conscious in a car on a family's property on the Central Coast. Fortunately she survived after being taken to hospital in a critical condition.
James Goodwin from ANCAP says no one should die in a vehicle.
"We have a goal of Vision Zero. Whether it's the driver, passengers, a pedestrian or child in the back seat, a vehicle should not be the source of someone's death," he says.
"We have technology now to help avoid these kinds of tragic accidents."
To make it a reality by 2022, ANCAP will include child presence detection systems as part of its safety rating process.
So far, Hyundai is the only manufacturer to introduce its own system called Rear Occupant Alert.
Found only in mid-spec (Elite) and flagship (Highlander) Santa Fe models, the South Korean car maker says the technology has the potential to trickle down into other Hyundai models in the future.
Sensors in the SUVs ceiling detect movement in the middle and rear seat, warning the driver with visual and audible warnings to check the rear seats upon exiting the vehicle.
A connected system called Hyundai Auto Link will send a text to the driver's smartphone if the warnings are ignored and the system detects movement for a period of 24 hours after the driver has left the car.
But ANCAP's warning to manufacturers is clear.
"Don't wait for us," Mr Goodwin says.
"We expect child occupant protection systems to be part of our testing protocol by 2022. If you've got the technology available now, bring it in as soon as possible - because it could save a life."
Mr Goodwin says it's up to manufacturers as to how they approach the safety systems.
"We're not telling them how to do it, but there needs to be some form of child protection system in place in order to score a full five-star safety rating," he says.
"Most car makers have some form of the tech already available, but it needs to be suitable for specifically detecting a child or animal left in a vehicle."
ANCAP says child presence detection systems should be common place by 2022, in the same way reversing cameras became a solution to a spate of tragic driveway fatalities when the rise in SUVs began 15-20 years ago.
"We should be doing everything we can to protect our youngest and most vulnerable members of the community," says Mr Goodwin.