Australia 14 Argentina 13
Australia finally gave new coach Ewen McKenzie something to smile about as they held off a gallant Argentina in wet and wild conditions at Patersons Stadium in Perth.
It was the Wallabies' first win in four matches of this year's Rugby Championship and the first since McKenzie took over from Robbie Deans following the Lions tour in July.
Australia took a comfortable 14-3 lead into half-time - the first time they have led at the break in seven Tests in 2013 - and appeared to be heading towards an easy win in front of just 18,214 fans.
But a determined effort from Argentina, coupled with some poor discipline from the home side, left McKenzie with his heart in his mouth for the entire second half.
The Wallabies conceded 12 penalties and did not score after the break as Australia continued to be dogged by the turnovers and handling problems that have been evident in six previous Tests this year.
However, McKenzie will be pleased with aspects of his team's win, including the performances of his new skipper Ben Mowen and scrum-half Nic White.
The Pumas drew first blood in the seventh minute when Wallabies winger Nick Cummins failed to release the ball after attempting a risky run on the opposition try line.
But the home side hit back four minutes later with a penalty of their own and grabbed the lead in the 17th minute when Argentina's scrum collapsed under pressure.
Israel Folau crossed the line five minutes before half-time after breaking four tackles to register the fourth try of his seven-Test career.
It came after Christian Leali'ifano broke through the miserly Argentina defence, before some quick hands from White and Quade Cooper gifted Folau the chance to convert.
Leali'ifano, who had just one failed goal kick next to his name in his short Test career, had his kicking boots on in the first half, even with the goalposts swaying, and his conversions ultimately helped the Wallabies secure the win.
But the Brumbies playmaker missed two chances in the second half that would have given the home side valuable breathing space.
The wet weather kept the forwards on both sides busy in the first half and, despite a brief respite during the break, more of the same followed upon resumption.
The Pumas came out of the blocks in the second half, forcing the Wallabies to concede numerous penalties through ill-discipline and handling errors.
Argentina's number eight Juan Manuel Leguizamon sent a scare through the Australian camp in the 61st minute when he crossed the line for his side's only try, which was followed in quick time by a penalty goal from Nicolas Sanchez.
But the Wallabies' forwards held their nerve under pressure in the closing stages as rain buffeted the ground, with the win ensuring Australia avoided their worst losing streak since 2005 when Eddie Jones was at the helm.