Alcohol was believed to have been involved.
The trio were travelling north on SH1 when the driver lost control around a moderate bend, going into a slide and hitting a bank, police said.
The Toyota Hilux rolled, throwing the front-seat passenger from the vehicle.
Ambulance officers attended the scene, but were unable to revive Mr Brown.
Two fire appliances from Pukenui and Kaitaia attended, but were not required much except diverting traffic, particularly those travelling north.
The weather was fine at the time the crash happened.
Police Serious Crash Unit is investigating.
The official holiday road toll period started at 4pm yesterday and will finish at 6am on January 3.
Last month, a man in his 40s, died and three others suffered moderate injuries after a two-car crash on SH1 at Pamapuria, about 10km south of Kaitaia.
Police will have a tolerance of just 4km/h above the speed limit for all drivers until January 31 and it is the first time the reduced speed tolerance has been extended beyond an official holiday period.