And Reds hooker Brandon Paenga-Amosa comes in for Folau Fainga'a, who struggled with his lineout throwing in the Wellington wind and like Samu drops out of the matchday 23 entirely.
Caleb Clarke will make his first Test start on the left wing in place of George Bridge, who has been sidelined for up to six weeks with a chest injury.
Veteran hooker Dane Coles also gets the starting nod ahead of Codie Taylor.
Twice World Player of the Year Beauden Barrett, a late injury withdrawal from the first Test, returns at full-back in place of Damian McKenzie.
Barrett replaces Damian McKenzie while Rieko Ioane, another ball spilling villain from Wellington, is demoted to the bench with Anton Lienert-Brown taking his place at outside centre.
Lock Sam Whitelock has failed to recover from a head knock, with Tupou Vaa'i coming into the starting line-up.
The changes seem to go little way toward remedying the weaknesses apparent in the All Blacks' game in Wellington.
Barrett is not in his best position at fullback but Lienert-Brown should shore up the All Blacks' midfield; Ioane, who played most of his tests as a winger before moving to center, was often caught out of position in the first test. The All Blacks have held The Bledisloe Cup since 2003.
Shannon Frizell was retained on the blindside flank despite criticism of his performance in in Wellington, and that avoided a reshuffle of the backrow.
"He's a really good leader and lineout forward and we think all those elements are important this week", Rennie said of Hanigan, who has played 20 Tests for the Wallabies. "So there has been plenty for us to work on".
"We need to be smarter with our ball and more focused defensively".
"There is everything to play for and we can't wait".
Brandon Paenga-Amosa will win his fifth cap in the middle of the front row, while Ned Hanigan has been named to start at blindside flanker, shifting Harry Wilson to No 8.