Some say the car a person drives can say a lot about them. As cars get “connected,” this turns out to be truer than many people might have realized. While connectivity can let drivers do things like play their favorite internet radio stations or unlock their car with an app, connected cars can also collect a lot of data about people. This data could be sensitive—such as biometric information or location—and its collection, use, and disclosure can threaten consumers’ privacy and financial welfare...