Plug the device into your PC’s USB port (no need to connect to the car yet). Open Diagnostic Software: Run VAUX-COM or OP-COM.
The software will query the device. A verified setup will return: "Interface Test Ended Successfully. Firmware Version: V01.67." Installation Tips for a Stable Setup opcom 167 firmware verified
If you are a Vauxhall or Opel owner who prefers DIY maintenance over expensive dealership visits, you’ve likely encountered the diagnostic tool. However, the community is often plagued by firmware issues, "bricked" interfaces, and software mismatches. Plug the device into your PC’s USB port