Black Caps fast bowler Trent Boult has been ruled out of the critical second Test against South Africa at the Basin Reserve in Wellington after sustaining an injury in Dunedin.
Piedt had played the last of his seven Tests against New Zealand, in Centurion, 2016, but was later axed in favour of Maharaj and Tabraiz Shamsi - for the tour of Australia as well as the home series against Sri Lanka.
Taylor's replacement, Neil Broom, is to make his test debut at the age of 33, while number five Henry Nicholls is still trying to cement his place in worldwide cricket.
Colin de Grandhomme also rejoins the team in place of Mitchell Santner, lengthening New Zealand's batting order.
The 33-year-old right-hander has been called in as cover for injured 81-Test veteran Ross Taylor, and du Plessis is expecting his bowlers to target the Test rookie.
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The left-arm pacer had left the field on Day Four of the Test match after bowling just 15 overs in South Africa's second innings.
"I'll come in for Boulty, a straight swap for Trent who will unfortunately miss this one", Southee said, adding the balance of the side was still being debated despite the green wicket.
"I said before the series that if we can get rid of Williamson and Taylor there's a lot of pressure on the rest of the batting lineup", du Plessis told reporters. They've still got enough resources.
South Africa were also weighing up whether to change their line-up with du Plessis saying the playing XI would be decided by the state of the pitch on Thursday morning.
"Injuries are part and parcel of cricket", Southee, who did not play the first Test, said.