The All Blacks have recorded their first home defeat at the hands of Argentina in a 25-18 boilover in Christchurch.
It is just the second time Los Pumas have beaten New Zealand in a rugby union international.
Los Pumas achieved their first win over New Zealand just two years ago in Sydney and Saturday's victory was from the same mould with magnificent defence backed up by iron discipline.
"I'm very proud of our team, we are starting to believe what we can do, not just a magic moment like our first win [in Sydney]," said captain Julian Montoya.
"Very, very happy, very, very proud. It's a very special moment for us."
The boot of winger Emiliano Boffelli — who kicked four first-half penalties — kept Los Pumas in the contest when New Zealand scored two tries in the opening period through Samisoni Taukei'aho and Caleb Clarke.
A Richie Mo'unga penalty helped the hosts into a 15-12 lead at half-time.
Flanker Juan Martín González scored an opportunist second-half try for the visitors though, and Boffelli added two more clutch penalties to keep the visitors ahead.
Mo'unga added New Zealand's sole second-half points with another penalty.
New Zealand — who played the last nine minutes with 14 men after Shannon Frizell was shown a yellow card — will almost certainly be plunged back into the crisis that was apparently ended by their victory over South Africa two weeks ago.
Poor discipline throughout the match cost the All Blacks dearly, handing them their third home loss in a row.
The victory gives Los Pumas — coached by former Wallabies mentor Michael Cheika — successive wins in the Rugby Championship for the first time after their impressive 48-17 thrashing of Australia in San Juan two weeks ago.
They also remain top of the Rugby Championship standings on points difference ahead of Australia, who earlier beat South Africa 25-17 in Adelaide.
It is the All Blacks' second defeat of the Rugby Championship and fourth in their last five matches.
ABC/Reuters
