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Mozilla review of 25 car brands finds they're "a privacy nightmare"
(foundation.mozilla.org)
This is a most excellent place for technology news and articles.
Per the article...
In addition, my car uses text-to-speech to read texts to me and I can even reply to them with speech-to-text. Any data that passes from your phone through your car could easily be harvested. You should also assume that any data on your phone can be harvested by the car's app if you install it.
How does it know the information is medical or genetic, if it captures text messages?
Any information they get is going to be examined for keywords at the very minimum. If, for example, you text your wife about test results from the doctor's office, they can add that to the profile they're making of you. If you get a text from a cardiologists office saying your results are in, they can infer you have heart troubles. Things like that.