It is understood Whetuki's parents are yet to be interviewed.
A Wentworth Ave resident, who did not want to be named, saw Ms Renata holding Whetuki in the driveway near the father's vehicle.
"I heard it ... there was a huge commotion. I was cooking and the television was on but the noise came through over the top of all of that," she told the Herald. "I ran out and leaned over the fence and that's when I saw the little fella ... his mum was holding him ... he was very quiet.
"She was organising somebody to get her car so she could get the wee kid to hospital. It was all over in a couple of minutes, she was gone. As she drove off she screamed at me "look after him", meaning the dad.
"I sat with him ... he was in shock, he just adored that kid. He was holding their little baby. He wouldn't let her go."
The woman was tearful when speaking to the Herald. "I was absolutely devastated. When is this going to stop ... they are just little babies."
Whetuki's family did not want to speak about the tragedy yesterday.
He is the fourth child to die after being hit by a car in a driveway since November.
Child deaths
• Four children have died as a result of being hit by vehicles in driveways since November.
• Every two weeks a child is hospitalised with serious injuries after being hit by a vehicle in a private driveway in NZ.
• A further five children are killed a year, on average, in the same way.
• Most children injured in driveway incidents are toddlers, aged about 2.