Opcom 1.67 Firmware [upd] Jun 2026
| Firmware | Stability | Programming | CAN speed | |----------|-----------|-------------|-----------| | 1.45 | Very stable | Limited | Slow | | | Moderate | Better | Medium | | 1.70 | Unstable (clone) | Poor | Inconsistent |
April 20, 2026
Opcom is a Windows-based diagnostic program tailored specifically for Opel and Vauxhall vehicles. It interfaces with the car's electronic control units (ECUs) via a specialized OBD2 cable containing a microchip. The firmware version—in this case, 1.67—refers to the internal software flashed onto the PIC18F458 chip inside the hardware interface.
Displays real-time sensor parameters, such as engine RPM, coolant temperature, and oxygen sensor voltages.
Because 1.67 is widely used, finding troubleshooting advice, drivers, and software versions (such as VAUX-COM) on forums is straightforward. How to Properly Use and Maintain Opcom 1.67 Opcom 1.67 Firmware
The software cannot find the USB drivers or the device lacks power.
Clone interfaces rely on physical internal relays to switch between different pins on the OBD2 port (pins 3, 7, 8, 12, etc.). Listen closely to the device when trying to connect; you should hear a faint clicking noise. If you do not hear clicking, a relay may be dead, or the firmware version is failing to trigger the switch. In some cases, downgrading a genuine chip to firmware 1.45 resolves specific pin-switching issues on older vehicles. Conclusion
| | Compatible Firmware | | :--- | :--- | | 100219a (China Clone 08/2010) | 1.39 | | 120309a | 1.45 | | 160115a | 1.60 / 1.67 | | 170823c | 1.65 / 1.66 / 1.67 | | 180115a | 1.67 | | 181022a, 200603a, 210406b | 1.67 |
A used ABS pump from a scrapyard triggers a "Control unit incorrect for vehicle" code. Opcom 1.67: | Firmware | Stability | Programming | CAN
If you are a professional tech, this is not the tool for you. If you are a DIYer, check your laptop OS compatibility before buying!
: This firmware version offers enhanced compatibility with various Opel models, ensuring that users can diagnose and troubleshoot issues on a wide range of vehicles.
Disable your antivirus software temporarily, as clone software often triggers false positives.
If your Opcom has a large rectangular chip on the board, try 1.67. If it has a small square black chip (QFP package), leave 1.67 alone—it won't work. Displays real-time sensor parameters, such as engine RPM,
Opcom is a PC-based diagnostic program used to communicate with the Electronic Control Units (ECUs) of Opel and Vauxhall vehicles. The firmware is the internal software that resides on the hardware interface (the OBDII plug) itself.
Extract your software package (e.g., Vaux-Com 120309a) to your local C: drive. Launch the application (always run as an administrator). Navigate to the or Configuration menu.
Disclaimer: Opcom is a third-party diagnostic tool not affiliated with General Motors, Opel, or Vauxhall. Modifying your vehicle’s ECU or immobilizer may void warranties or violate local regulations. Always verify compatibility before performing programming.
Hold the key while clicking Restart in your Windows Start Menu.