Opcom 167 Firmware Work (Fast)
OPCOM 167 Firmware Work: A Detailed Overview
- Run the Opcom application as Administrator.
- Go to
Settings→Interface→USB. - Click
Test Interface. You should see firmware version (e.g., V1.39).
Cause:
Power starvation via USB (especially on laptops). Solution: Use a powered USB hub (5V, 500mA minimum). Also check the 7805 voltage regulator on the Opcom PCB – if it runs too hot, replace it.
- Recommended for: DIY mechanics owning 2002–2012 Opel/Vauxhall. Perfect for engine, ABS, airbag, DPF, injector coding, and key programming (if PIN known).
- Not recommended for: 2014+ cars, PSA group vehicles, or anyone needing SPS/online coding. For those, buy a genuine MDI2 or VNCI.
Q: Is there open-source firmware for Opcom 167?
A: Partially. The project "OpenDiag" reverse-engineered the communication protocol. However, the official firmware remains closed-source. Some users successfully run OP-COM-Pico , a custom firmware for Raspberry Pi Pico, but that is not true "167 firmware work." opcom 167 firmware work
The OPCOM 167 firmware became notable for enabling "Security Access" levels that allowed users to reprogram keys and ECUs without dealer intervention. The work here involved reverse-engineering the "seed-and-key" algorithms used by General Motors. By emulating the handshake required to unlock the ECU, the firmware allowed mechanics to perform tasks such as ECU pairing and mileage correction. While this capability raised concerns regarding vehicle theft, it also represented a victory for the "Right to Repair" movement, empowering independent shops to offer services that were previously the exclusive domain of dealerships. OPCOM 167 Firmware Work: A Detailed Overview