Some custom code and $100 in hardware are all hackers need to access your Bluetooth signals. The hijacking method is a threat to many conveniences Bluetooth offers, but most noteworthy is the ability to access Tesla's phone-based unlocking option.
Ok, but what is the solution? Currently, Tesla has no public statements or announced plans for patches or solutions. Lock-maker Keikset has announced plans for app timeouts with PIN requirements to enable unlocking access. That solution is available on iOS and should be applied to Android by September.