South Africa gained revenge for last week's defeat in Adelaide as they beat Australia 24-8 on Saturday.
Australia missed the chance to move top of the Rugby Championship standings as they were downed 24-8 by South Africa in Sydney.
The Wallabies ran out 25-17 winners against the same opponents last week, having been in control until a late flurry of Springboks tries.
Yet it was South Africa who made a blistering start this time out, and unlike Australia in Adelaide, they never looked likely to surrender control as they claimed a second win of the campaign.
Damian de Allende dived in under the posts inside 10 minutes, presenting Damian Willemse with a simple conversion.
Matt Philip's yellow card compounded Australia's frustration, though having kept South Africa from capitalising on their numerical advantage, the hosts clawed back three points through Noah Lolesio's penalty.
Australia's hard work was undone before half-time, however – debutant Canan Moodie beating Marika Koroibete to Jaden Hendrikse's hanging kick in midfield and charging over for a maiden Test try.
A slick team move, capped off by Franco Mostert, extended South Africa's lead after the restart, and despite Australia mounting some pressure, the 'Boks kept their hosts at arm's length.
Willie le Roux's drop-goal attempt almost nudged the reigning world champions further ahead, but South Africa had their bonus point when Makazole Mapimpi lunged across in the corner.
Mapimpi's try resulted in a mass fracas, with the try scorer subsequently sin-binned for lashing out at Koroibete.
Francois Steyn added the extras with an excellent long-range conversion, and though Australia got a consolation through Pete Samu and Le Roux saw yellow, South Africa had little trouble in seeing out a big win.
Moodie makes his mark
Handed a debut by coach Jacques Nienaber on the right wing, Moodie made the most of his opportunity with an excellent score at the end of the first half.
The athleticism shown by the 19-year-old was outstanding, with Moodie outjumping Koroibete before sprinting off to the line.
Mapimpi loses his cool
South Africa's fourth try came at the culmination of another excellent passing move, with Le Roux's movement particularly outstanding in the build-up.
Mapimpi held off Koroibete's tackle to finish, but could not help pushing out at his opposite number. Had there been more time left to play, his lapse might have allowed Australia back into the contest.
