However while both Mazdas passed with flying colours, the new Audi TT coupe fared worse, with only a 4-Star result thanks to a below-average child occupant protection score and what ANCAP termed "insufficient safety assist technologies".
Using crash test data from sister organisation Euro NCAP, ANCAP's Audi TT results mirror those of its European counterpart.
Under Euro NCAP rules, the TT scored 81 percent for adult occupant protection, 68 percent for child occupant protection and 82 percent for pedestrian protection. These are the same scores used by ANCAP in its test report.
The Mazda2 and CX-3, meanwhile, were assessed under slightly different rules and, according to ANCAP, the availability of autonomous emergency braking as an option (albeit a $400 one) on both cars secured their 5-Star ratings.
Autonomous braking isn't available on the TT, but that's not to say it's without up-to-date safety equipment.
A fatigue detection system is standard on all models, and 'lane keep assist' and blind-spot monitoring are optional with the Assistance Package.
And, showing the anomalous nature of this testing, both the CX-3 and Mazda2 are also 4-Star cars when assessed under the same Euro NCAP rules - although Mazda will argue the cars tested there were left-hand drive and thus not applicable to this market.
Mazda could also argue that CX-3 and Mazda2 scored slightly higher for adult and pedestrian safety, and markedly higher for child occupant safety.
ANCAP CEO, Mr Nicholas Clarke used the results as an opportunity to reiterate his organisation's view that life-saving technologies like autonomous emergency braking should become standard equipment.
“It is great to see AEB becoming more common in the Australian new car market, but we would like to see AEB as a standard feature in new vehicles, rather than as an optional extra” he said.
“International studies have shown the effectiveness of AEB systems in preventing real world crashes may be higher than 50 percent.
"The introduction of more advanced AEB systems - which work at a range of speeds, and which are able to detect other obstacles such as pedestrians and cyclists - will contribute to a further reduction in the number and severity of road crashes."