Meanwhile, for 25 years, from the early 1960s, Kaikohe was very much the commercial centre of the Far North, days that Petersen remembers well.
"Kaikohe was a bustling little town back then," he said.
"In my time there have been some significant changes to rural areas, starting in the mid- to late-80s, when the economy began to change."
In 1989 he was offered a Toyota franchise, and the dealership changed brands. He continued with Toyota until 2003, when, in a déjà vu moment, Toyota chopped small dealerships around the country and Petersen Motors was again left in the lurch. Since then it has successfully concentrated on second-hand cars selling for less than $10,000, but now even that is coming to an end.
Petersen said he was well past the "normal time" for retirement, and would even be looking at selling his collection of increasingly rare car manuals to collectors.
The land where Petersen Motors stands, and next door to where once stood a second-hand clothing shop, is believed to have been bought by the Far North District Council. Land on the eastern side, where once stood the Kaikohe Hotel, is owned by Te Rūnanga ā Iwi o Ngāpuhi.