: Supports vehicle models from 1987 to 2021, whereas older 1.67 versions were limited to 2016.

This is usually a driver issue. Check the Device Manager to ensure the device is listed under "Ports (COM & LPT)" or "Universal Serial Bus Controllers."

Firmware 1.67 is typically paired with software versions like Vaux-Com 120309a or various OP-COM 2014 builds. Using it with much newer software may result in an "Interface not found" error.

When you install Opcom software (v1.67), the software includes a firmware file. The first time you plug in the interface, the software tries to "flash" or "update" the firmware on the device.