When I removed the DCM the in-car microphone stopped working, but I bought one of these to get it working again: https://www.autoharnesshouse.com/store/AHH-DCM77.

Also even with no modem, if you use CarPlay on your phone _via Bluetooth_ then the car will just use your phone's internet connection, so I only use CarPlay via a wired USB connection.

Aside from that the car works great, everything is 100% functional. I suppose I don't get OTA updates, which I'm fine with.

Wow, that is evil that they steal your data to send telemetry back via carplay. I always assumed that was possible so I have never actually hooked my phone up to a car but it really saddens me that it actually happens. There is 0 requirement for my phone to pass along raw internet access to the car in my opinion.

I have a Skoda and the GPS module was broken and that messed up a lot of the systems in the car, I couldn't use the adaptive cruise control, no traffic signs recognition and no SOS module. And apparently CarPlay sometimes uses the car's GPS module, so navigation was also a pain. I'd have to start the navigation from outside the car, otherwise it wouldn't use the phone's GPS.

> so I only use CarPlay via a wired USB connection.

Wouldn't that also share your phones internet connection with the car?

Did the car have a built-in navigation feature? I presume after you removed the GPS connection it broke, and you instead use CarPlay for navigation?

Is there anything special in the harness? Or is it just a wiring setup to make it easy to plug in with the bypass?

Cool so my USB wireless car play dongle still has some life left in it. Good to know.