Here's what i found.
https://www.accc.gov.au/update/just-bought-a-new-carMinor failures
This type of failure happens when:
your new car can be fixed, or the problem can be resolved, within a reasonable time (e.g. your car’s engine develops a slight rattling noise that doesn’t interfere with its ordinary operation, and can be successfully repaired within a reasonable time).
Type of remedy
The supplier that sold you the car (e.g. the car dealer) can choose to repair or replace your new car, or to offer you a refund.
Any repairs must be done within a reasonable time and without charge.
However, you may choose the remedy if the repair is not done in a reasonable time.
In this case, you may request a free replacement or a refund. You may also seek a repair elsewhere and be able to recover the costs, as well as any ‘reasonably foreseeable’ loss or damage you suffered as a result of the failure, from the supplier that sold you the car (e.g. the car dealer), or in some cases from the manufacturer.