The All Blacks victory means the Springboks will also need to secure a bonus point and beat Argentina by 40 points in the final match of the championship in Durban to take the title back to South Africa.
The All Blacks have notched up another win in their record-breaking run at Eden Park, defeating Australia 40-14 in Auckland on Saturday 24 September 2022.
A clinical All Blacks display ensured a largely one-sided return match after last week's thrilling first Bledisloe Cup test -
They scored five tries to two in front of a sold out crowd of 47,000 - extending a Wallabies winless streak at Eden Park going back to 1986.
New Zealand led 17-0 at half-time, with Will Jordan dotting down for a try in the 23rd minute, followed five minutes later by a penalty try when the All Blacks went for a lineout drive and it was pulled down illegally.
Two Australian players were given yellow cards in the first half.
Sam Whitelock scored for the All Blacks early in the second half, before Codie Taylor also crossed the line.
Australia got its first points on the board in the 58th minute, when the Wallabies pounced on a charge-down in New Zealand's 22 and Folau Fainga'a scored.
New Zealand then countered with a Samisoni Taukei'aho try in the 65th minute, and Jordan Petaia scored a consolation try for the Wallabies in the dying seconds of the match.
The All Blacks have not lost at Eden Park since 1994.
The victory means the Springboks will also need to secure a bonus point and beat Argentina by 40 points in the final match of the championship in Durban to take the title back to South Africa.