The Jaguares have recorded their first win over the Hurricanes, holding on for a 28-20 victory to move them to the top of the South African conference.
Agustin Creevy and Jeronomio De La Fuente crossed and the Argentines were awarded a penalty try when Jordie Barrett was sinbinned for a professional foul to give the visitors a 21-8 halftime lead at Westpac Stadium in Wellington.
Julian Montoya grabbed a fourth try after the break to ensure a victory that gave the Jaguares 32 points and moved them above the resting Sharks (29).
Vaea Fifita, Ngani Laumape and Kane Leaupepe scored tries for the home side,who remained second in the New Zealand conference on 40 points.
The Hurricanes were outplayed by a Jaguares team that constantly harried them and forced errors in the hosts first home defeat by foreign opposition since 2015.
"It is very big for us as a team," said Jaguares back-rower Pablo Matera, who was one of their tireless heroes.
"To come here and get a victory in Wellington against the Hurricanes, one of the best teams in the world, is amazing for us.
"We've been working very hard since January. All the work we've been doing was reflected here tonight."