These days, cars are internet connected. Cars like Tesla have internet connection to get software updates, to get data to train their AI, and to provide navigation features.
Car computers collect data about the car, but usually won’t transmit it over the internet, they will store it in local storage. It depends on the car you have. Some cars have internet connectivity in order to get certain features working, and we don’t know what data collection is done by them and sent to the company.
However, your phone is the biggest tracker in your car. Google/Apple are tracking your location. Insurance apps that claim to lower rates, they track your driving behavior. And if you use Apple Carplay/Android Auto, thats even more information these companies know about your car.
With the rise of 5G, cars are becoming more connected to the internet, to allow for a fully autonomous driving experience.