The McDonalds store manager said she may be in a position to talk about the accident later today.
A woman who was in McDonalds at the time said she heard what sounded like the restaurant drink machine toppling over and looked around to see the car shattering the window.
The woman, who did not want to be named, said she attended to the driver while the friend she'd been having coffee with tended to the injured pedestrian until an ambulance arrived.
"It looked like the driver was trying to avoid another driver who had pulled out of a carpark right in front of her," the woman said.
"It's just very good luck that nobody got seriously injured."
It was the second accident involving an elderly motorist driving into a shop in Whangarei in less than a month.
On January 25, a woman was left with broken bones and internal injures after a yellow Suzuki Liana driven by a 73-year-old man ploughed through the front of the Cheesecake Shop on Tarewa Rd.
The injured woman was covering her young daughter from the crash when she was hit while standing in line at the Cheesecake Shop.