The other victims have since been discharged from hospital.
The alleged driver of the car, who has interim name suppression, is facing further charges following Cowley's death.
The woman, 35, will be charged with reckless driving causing death and driving with excess breath alcohol causing death, police said.
The charges will be laid at her next appearance at Manukau District Court on Tuesday.
'Big bang'
A woman who witnessed the aftermath of the car ploughing into pedestrians said she joined other shoppers in rushing to the aid of the injured.
The witness said she ran to the scene after hearing a "big bang" from the nearby Coffee Club.
She said the sound of the impact was so loud she initially thought a truck must have slammed into the low ceiling of the car park.
She discovered it was a car that had taken out three steel bollards on Amersham Way on its way into the covered car park.
She said one male patient was "swearing his head off" in the immediate aftermath, with another female patient conscious and three older patients unresponsive.
