

There are many ways, a popular choice would be managing your own recursive DNS resolver and then blocking the endpoint it contacts.
PiHole - Non recursive but offers blocking capabilities, can make it recursive with Unbound.
Technitium - Recursive but not nearly as user friendly as PiHole, also lacks the fancy Ui.
I’m confused here, if cars are not connected to the internet how else are they broadcasting the data? Or is it collected during maintenance and if so what do mechanics care about your sexual activity.
Edit: Reading through the comments there are 3G/4G/LTE/5G bands in the cars? Who is paying for the cellular service then?
I don’t drive nor care about cars so this isn’t my wheelhouse obviously.