The Federal Chamber of Automotive Industries said sales rose by 16.1 percent last month compared to the same month in 2020.
Tim Dornin
The case was revealed on August 4, more than two weeks after the outbreak first emerged.
South Australians in Queensland have been urged to consider returning soon to avoid any tougher travel restrictions.
Authorities have tightened restrictions for returnees from regional Queensland if they transit through Sydney Airport.
State health officials have called for caution after two more infections were added to the latest cluster of Covid-19 cases.
South Australians have taken well to wearing masks in public after emerging from the week-long Covid-19 lockdown.
South Australia's peak business group says the sector will look to rebuild again after the latest Covid-19 enforced lockdown.
Class action over the mistreatment of youths in detention in the Northern Territory has been settled for around $26 million.
South Australia remains on track to emerge from its week-long Covid-19 lockdown on July 28.