With a non smart car, given the same access and not even being an expert I can add microphones, trackers, a device that will cut the break lines and for added Hollywood spectacle an explosive device.
This is not to demise the risk of china being able to brick these vechicles. It’s been done before, remember the John deer tractors stolen by the Russian invaders in Ukraine?
The real danger was being able to listen in and the potential for identity theft and recording conversations. ASIO recently issued a warning that government officials should avoid having confidential conversations in any internet-linked vehicle, so not just BYD.
BYD though are having a bad day with a major recall due to the spare wheel falling off Shark 6s.
https://www.drive.com.au/news/2024-26-byd-shark-6-recalled-b...
Might have to avoid driving behind one, as I see them everywhere.