this post was submitted on 02 Aug 2024
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Privacy
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Remove the cellular modem.
What are the chances the software is designed to throw errors and "See a technician" messages if you dk?
I’ve heard it can cause problems in some models, so people need to do their research. With my truck it’s dead easy and are no drawbacks.
We need an iFixit-like database giving each car a score about how easy it is to unplug the telematics units and what errors it may result in, complete with a score.
My suggestion, if you're looking for a new car, is to research where the modem in the car is, and unplug it during the test drive (assuming it's reachable).
I unplugged the one in my work truck, 2023 Ford F150. They call it the "Telematics unit" and it's on the rear cab wall on the right side, hidden behind the sound deadening foam. I did this after it was bought, but if I had known about it before my boss paid it, I definately would have tried it before the test drive to make sure, and I plan to do it if/when I look for a newer car!
I unplugged every cable coming into it - power, antennas, data, all of them! The only issue that comes up is the center screen on the dash crashes back to the main menu when you try to open the data/wifi settings.
No other issues so far after almost 5k miles! No warnings, no lights on the dash, nothing! Android auto/carplay even still works! Don't know yet if the dealer will try to plug the unit back in during the next service, but I intend to raise hell if they try!
Depends on the car but I'd say the chance is above 50%
Not small, but I think you’ll have better chances with the mid level commuter cars. You’ll probably get some error messages on some of them, but if you can ignore them, they wouldn’t stop the car from running.It’s the high end ones and EVs that have a higher chance of bricking if you disable the antenna.
Most of the cars will still try to connect to open Wifi when available to upload data.
Very nice ! That's when you can start spying on your car's behavior.
Not really. If they use TLS / HTTPS then you won't see a damn thing.
Yeah. Believe me most of these embedded controllers are not very well programmed. Play a bit with fake certificates and I won't be astonished if you to catch something.
Get rid of the car
And add a Faraday's cage. There are other things except for cellular connection used in cars such as WiFi and Bluetooth.
That's impractical. Bluetooth and Wi-Fi also needs modems so just remove those too.
I mean sure if you can find and remove them. They're very small.
They're going to be in the same location for a given model year, which somebody will likely have documented online.
I'd want bluetooth for music from my phone though. And it'd be nice if my phone's cellular and GPS didn't get blocked.
Isn't your phone far more connected to your identity than your car? As in, if your worried about Toyota or Ford tracking your vehicles driving statistics it seems using GPS and wifi and Bluetooth on your phone that also has all your payment info, browsing history, and all your passwords saved defeats the entire purpose of worrying about your car. However, at least your phone gives you a benefit to using it like navigation and music, your car just mines your location data.
Privacy is not just black and white.
But then the car can send the data via unprotected WiFi spots. I don't think you can turn off autoconnect.
Perhaps disconnecting the RF antenna, and replacing it with an appropriate termination?