The Pumas backed up their first win over the All Blacks with a 15-15 draw against the Wallabies in Newcastle on Saturday night.
The draw leaves all three Tri Nations teams on six points, with New Zealand top on points differential, although Argentina have a game in hand.
Australia dominated territory and possession in the first half but Argentina, looking to win back-to-back games in the Southern Hemisphere competition for the first time, again defended superbly to keep the hosts tryless, while Australia were left ruing mistakes as impatience and continual errors broke down multiple forward surges.
The Wallabies ramped up the pressure either side of the break and and hooker Julian Montoya was sin-binned early in the second half after the Pumas conceded a string of penalties close to their own tryline.