Modern cars are increasingly becoming "smartphones on wheels" – with constant internet connection, telemetry, and data transmission to manufacturers. But one Toyota RAV4 owner decided to radically opt out of this system. Cybersecurity specialist Arkady Tetelman physically removed the DCM communication module and GPS antenna from his RAV4 to completely stop the car's data transmission.

DCM stands for Data Communication Module, essentially a built-in car modem. Through it, the car sends telemetry to the manufacturer: location, trip data, system status, and the operation of electronic assistants. Such modules also provide OTA updates, remote access via an app, and an SOS emergency call function.

Tetelman described the dismantling process in detail: you need to disassemble the center console, remove the multimedia system, and disconnect the communication module. After this, the car loses its network connection, and the SOS indicator stops working. However, the basic functions of the car are retained, including wired CarPlay.

The most unexpected nuance is related to Bluetooth. The researcher claims that even after removing the modem, the car can use the smartphone's internet to transmit telemetry if the phone is connected wirelessly. Therefore, he recommends using only a USB connection.

The story quickly went viral on Reddit and specialized forums. Many owners are discussing not only privacy but also the growing dependence of cars on a constant internet connection.