Bad news: your car is a spy. Every major car brand failed a recent privacy and security test from Mozilla. You’re probably driving around in a "privacy nightmare" that may collect information as sensitive as your race, health status, and sexual activity.
Mozilla started a petition, sign that.
Look up your vehicle’s company’s privacy policy. If there is a way to opt out of some of the data collection, do it.
Not much else can be done other than protests, lobbying, etc. to make your politicians make laws regulating the data cars can collect.