The 2024 Ford Maverick has a single fuse for the telematics unit that you can remove without throwing a code or an error. No idea if this remained true after the 2025-2026 refresh, but worth knowing.
Kias have a “Massachusetts mode” flag hidden behind a service menu (that needs a dealer code) that disables telematics at the owner’s request. However, the service menu pin also has timeout protection that will inject a waiting period between retries so there is no guessing.
I don’t think there’s convincing my dealer to get into the service menu and disabling it.
I would presume that other manufacturers might have this as well.
Older Toyotas also had a DCM fuse, and this was the easiest way to get rid of telemetry. I am not sure if partially disassembling the dash and physically removing the DCM is now necessary.
There's still a fuse for the DCM even in this car but:
- It has an internal battery and will keep running for quite a while after pulling the fuse. This is a safety feature in case you get in a crash that disconnects the 12V battery
- It will break your in-car microphone as discussed. Repairing that requires opening up the dash
- That won't do anything for disconnecting the GPS antenna
> Even after the modem is removed, if you connect your phone to the car via Bluetooth then the car will use your phone as an internet connection and send all the same telemetry data back to Toyota
What is the basis for this claim? I've never heard of this capability.
> Even after the modem is removed, if you connect your phone to the car via Bluetooth then the car will use your phone as an internet connection and send all the same telemetry data back to Toyota. However, if you use a wired USB connection then it does not do that (see the discussion here and elsewhere), so I exclusively use CarPlay via USB.
The problem with this is that both carplay and android auto capture their own vehicle telemetry. So even though the car is not able to use your phone as a general data pipe, Google and Apple still get access to this data when you're connected.
They are both very cagey with how they talk about this (or don't).
And once you've gotten rid of Google and Apple, your telecom company tracks you, your CC payments help track you and even cameras in public do.
It's hard to not want to throw your hands in the air screaming "whatever" when almost everything you use in public is somehow used to track you either as you move around, or in the future.
>if you connect your phone to the car via Bluetooth then the car will use your phone as an internet connection and send all the same telemetry data back to Toyota
Source? Can bluetooth devices do that without the user's knowledge?
Can you clarify? Does it feed it bullshit data? Because android auto expects car telemetry data which it streams to Google's servers. Which is a big no-no for me for obvious reasons.
It doesn't stop Android Auto from doing whatever with the car data, but it's sandboxed to have no more default privileges than a regular app, so it can be denied access to your phone's data by default (apps, contacts, etc.). Wireless AA will only work if you grant it extra privileges; wired AA does not need them.
You can also "firewall" AA via something like TrackerControl, this would let you block connections to eg. Google Analytics servers without denying network access altogether (which would likely cause AA to stop working). I've only used AA with short-term rentals so I didn't spend too much time exploring these options.
In a perfect world they wouldn't collect it either, but I'd rather Apple have it than the car manufacturer (or rather, only Apple vs both Apple and the car manufacturer)
No, they meant inflated. Cars are quite expensive right now, and dealers are notorious for raking in cash through financing. If they were subsidized, prices would be lower to increase user base, as in the aforementioned dynamic present in the current smart TV market.
I think the inital point was that car manufacturers/dealers are double dipping through initial cost/interest AND data harvesting.
Both an high end tv or a car are expensive items where the manufacturer shouldn’t be making additional income on your personal data.
A free 55 inch tv supported by ads would be subsidized. A big ticket item price likely does not change even if it intrudes on your privacy and the manufacturer makes additional income on your data. In that sense it’s not subsidized it’s just greedy business practices.
Just a note about Toyota specifically - There are many blog posts and articles out there alleging that Toyota shares your data with insurance companies.
As I own two Toyota's I have read through these carefully and consistently the theme is that the owner was opted into this program without knowing it (likely by the sales person clicking through setup steps to enable every feature). If you are not opted in, I have seen no evidence they share driving data.
When I set up my Toyotas, the app clearly walks through the programs they have and you must click either "yes/opt in" or "no/opt out" for each program. It is not opted in by default.
> Unfortunately I think it’s only a matter of time before the modem and GPS become more deeply integrated into the car (making this blog post infeasible), or cars have more drastic failure modes when the modem/GPS is removed, or anti-right-to-repair laws get passed to further clamp down on this behavior.
The author probably means CarPlay and Android Auto. In wireless mode they share the phone's internet connection. The adapter linked in the article is a CarPlay adapter, not plain BT.
It would also require that my phone not show my car using the hotspot, when it does show my laptop, and also for my cellphone plan to not show that usage (I have limited hotspot data), which is theoretically possible, but now we're talking three companies having to collude in a totally undetectable fashion, which seems a little far fetched.
Bluetooth PAN seems to work pretty seamlessly once you've paired your phone and set it up. It's possible some kind of "seamless hotspot" functionality is remotely activating PAN on a paired device.
From what I understand the CAN traffic on my vehicle is encrypted. Clearly this does not apply to all of the traffic, as I can fetch some OBD2 data with a generic dongle.
Excellent practical guide and pictures, if OP is around on this thread: well done! Your future self is going to appreciative too when this needs repeating at some point!
In case of Subaru turning off 2G made their modems keep trying to reconnect 24/7 draining and killing battery. Subaru refused replacing batteries killed by defective car.
You would be surprised how leaky RF can be and how hard to completely suppress. There is a reason things like anechoic chambers and test labs are very expensive.
Leaky - possibly, but we are dealing with the real world where you have plenty of background noise. The cell tower will likely fail to receive the signal.
Great guide! After getting to the end, I had no idea what AirPlay was so I looked it up... bro, all this effort to avoid telemetry and you are using an iPhone XD
https://www.mavericktruckclub.com/forum/threads/telematics-f...
I don’t think there’s convincing my dealer to get into the service menu and disabling it.
I would presume that other manufacturers might have this as well.
- It has an internal battery and will keep running for quite a while after pulling the fuse. This is a safety feature in case you get in a crash that disconnects the 12V battery
- It will break your in-car microphone as discussed. Repairing that requires opening up the dash
- That won't do anything for disconnecting the GPS antenna
What is the basis for this claim? I've never heard of this capability.
The problem with this is that both carplay and android auto capture their own vehicle telemetry. So even though the car is not able to use your phone as a general data pipe, Google and Apple still get access to this data when you're connected.
They are both very cagey with how they talk about this (or don't).
It's hard to not want to throw your hands in the air screaming "whatever" when almost everything you use in public is somehow used to track you either as you move around, or in the future.
Source? Can bluetooth devices do that without the user's knowledge?
You can also "firewall" AA via something like TrackerControl, this would let you block connections to eg. Google Analytics servers without denying network access altogether (which would likely cause AA to stop working). I've only used AA with short-term rentals so I didn't spend too much time exploring these options.
I think the inital point was that car manufacturers/dealers are double dipping through initial cost/interest AND data harvesting.
A free 55 inch tv supported by ads would be subsidized. A big ticket item price likely does not change even if it intrudes on your privacy and the manufacturer makes additional income on your data. In that sense it’s not subsidized it’s just greedy business practices.
As I own two Toyota's I have read through these carefully and consistently the theme is that the owner was opted into this program without knowing it (likely by the sales person clicking through setup steps to enable every feature). If you are not opted in, I have seen no evidence they share driving data.
When I set up my Toyotas, the app clearly walks through the programs they have and you must click either "yes/opt in" or "no/opt out" for each program. It is not opted in by default.
Guaranteed
Afaik phones do not share their internet blindly to Bluetooth devices.
https://rabbit-labs.com/product/cancommander/
Crazy commenter, tell us a little about this. Can I use it on any Can bus?
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