Lineage OS

Yes, but not entirely.

You still have an OS with less tracking built in, and you have more control over apps & permissions (like being able to entirely block data usage for certain apps at the system level).

Yes, it's still easier for Google to invade your privacy with GApps, but let's be frank, the amount of info they can gather through Android Auto even 1 wasn't linked to other system apps is pretty staggering. They know where you are & where you're going at any given moment. They have access to your notifications, including messages, what music or podcasts you're listening to, etc...

There's just unfortunately no comparable alternative, aside from just mounting your phone on the dash with a phone app