The search was initiated after a “bong” was seen inside the vehicle.
An estimated $4500 worth of items – including a large amount of perfume – was located stacked in two baskets in the back seat, along with a shotgun shell.
Grantham said staff from the store involved were grateful to the two arresting officers.
They were made aware of the arrest and were pleased to hear the stolen items had been recovered.
A 23-year-old gang associate and a 15-year-old gang prospect who were arrested at the scene are due to appear in the Palmerston North District Court and Palmerston North Youth Court.