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The connectivity may not be fully disabled in a 2025 Acura Integra, but there is a way to disable data sharing. You then have a permanent yellow "nag icon" top right on your infotainment screen, but the spying is "disabled." I mean what this other commenter in this same thread found via GDPR after doing this very step: https://news.ycombinator.com/item?id=49955366

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Depending on the car, how you disable it may not really disable it at all. Connecting your phone via Bluetooth or taking the car in for service will often let the car upload a backlog of data.

You generally have to completely remove the power from the DCU - which can have as many as three different power sources (including a backup battery with days of power in some cases!), and often disables features in your car like the hands free microphone, built in gps, etc.

And that's not all. I used to work with a guy who spent a large portion of his career at a famous car manufacturer. I can't say which one cause their operation and output is rather small(niche, hyper-wealthy customers that take their international passport when they go for a drink across the street, "just in case"). From what he told me, their cars have 11 individual computers with full operating systems on them for various reasons. While compute has become more expensive over the last few years, courtesy of slop, small, embedded ARM devices are still inexpensive and incredibly powerful. I also spent a short time in the automotive industry(where I met the guy I mentioned) and modern cars are an absolute integration hell and even their engineering teams can't say fully what's in them in terms of hardware and it's magnitudes worse with software.

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