Cars are data-harvesting machines. These brands share your personal information [most do, Hyundai, Kia, and Tesla 'most concerning]

An investigation by consumer advocacy group Choice found most of Australia's popular car brands collect and share "driver data", ranging from braking patterns to video footage.

Kia and Hyundai collect voice recognition data from inside their cars and sell it to an artificial intelligence software training company.

Privacy and consumer rights advocates are pushing for law reform to limit data collection to what is "fair and reasonable".