Why do car companies even collect data?

A long while ago I remember a car company got in major trouble after they leaked a ton of user data (I think it was Toyota but not sure). A few questions came to mind, like what kind of data do they collect? Is it navigation data? Do they log where I go? Is there a way to opt out of getting logged by car companies? I never thought this could be a problem but I really don't like getting …

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