[lstodd]

1. get a _real_, unabridged service manual. that takes some darkweb experience nowadays.

2. identify anything that looks like capable of housing a cell modem. that takes some understanding of contemporary car electronics

3. deny RF interface to units identified. that takes some understanding what RF = radio frequency interface is and also getting rid of fear of disassembling significant portions of your car.

All in all that is a great learning experience.

[aembleton]

If I disable the modem, does that disable the SOS feature? Do I need to tell my insurance company?

[lstodd]

That is the least of your troubles. SOS is the telemetry you wanted to get rid of in the first place.

And chances are you would have to get rid of 2/3 or more of oem electronics.

It'll end up a prototype vehicle or something, with custom ECU and stuff. On the bright side it will belong to you and not to the some mckinsey guys running those insurances and whatnot. It has been done too, although I personally prefer to just use vehicles that do not require this level of effort.

The other day there was a thread on unclouded tractors what I missed and I must tell I love my Universal 445 made in Romania in 1989. For all its quirks, it just gets the job done, no connectivity, no nothing, it's an unbreakable 3-cylinder diesel that just works.