[godber]

This claims to bypass the telematics functionality:

https://www.autoharnesshouse.com/69018.html

> Note for customers retaining OEM headunit: This adapter can also be used for those wishing to remove/disable the OEM Subaru Telematics functions. This is done to eliminate the tracking cabability that Subaru has built into these vehicles. If this is you, we will need to add an additional part to this adapter to re-enable the bluetooth microphone. Please purchase the option 2 adapter near the bottom of this page for this situation.

[bityard]

Is there anything like this for Toyota DCM?

We bought a second-hand 2021 Highlander and thus did not sign any contract allowing our family to be tracked by Toyota. I went on a hunt recently for information on neutering the DCM but have thus far only found speculation and contradictory info.

[willis936]

Yeah it's bad out there. Don't do what the yahoos hacking up their harnesses have done. The Toyota DCM I'm familiar with has 3 coax antenna lines coming in. The outer 2 are cell and the inner is GPS. Pull the cell antenna cables out of the DCM and you should be good to go. Best to hunt down your vehicle's service manual and verify the procedure first.

[LandoCalrissian]

Awesome, thank you. Seems pretty straight forward.

[godber]

The info on that page seems a bit contradictory, but maybe I need more coffee.