Andrew Archibald said he was ''completely surprised'' with the awards considering the quality of other companies in the mix.
The sales numbers and the awards prove how well Northlanders regard the Mitsubishi brand, he said.
''Northland has supported Mitsubishi for a long time. It's a brand that suits Northland needs and terrain and it represents really good value. They're a good company to deal with. I think you'd be hard pressed to find a customer who was aggrieved about any warranty matters.
''Our major difference is that we don't treat our customers as just a number. A lot of them come from outside our area too, because they know they'll get good service and we respect their effort, too.''
His great grandfather started ''Archibalds'' as a general store 99 years ago, and moved into vehicle sales when motorised wagons began to feature in the district.
Three generations have since continued the business that eventually became a Mitsubishi dealership.
Archibald said the family business has always embraced change and progress. The large workshop keeps up to date and latest figures indicate the company is number one in the country for parts sales and use, he said.