Opcom Firmware 1.99 Hex File [updated] Jun 2026
Understanding the version numbering is key to navigating the Opcom market. Official firmware versions progressed from 1.33 through to the genuine latest, . However, market demand for a "newer" version led Chinese clone manufacturers to simply rebadge older, functional firmware (like 1.39) as 1.99 or 1.70 to sell to unsuspecting users.
Before attempting to flash a 1.99 hex file, you must inspect the circuit board (PCB) of your OP-COM interface. Genuine/High-Quality Clone (OP-COM Pro) Low-Cost Clone Microchip PIC18F458 (Flashable) OP-COM/Fake Chip (Locked) Firmware Upgrades Supported via programming tools. Will permanently destroy (brick) the chip. Stability High; supports multi-can switching. High failure rates on CAN-bus systems.
First, you must verify the chip. Open the Opcom interface's plastic housing and carefully inspect the main chip. If it is a genuine , you may proceed with caution. The following prerequisites are required for a safe flashing attempt:
The original Opcom was cloned extensively from a Russian-designed interface. The software suite (often called "Opcom China" or "Genuine Opcom") allows users to perform:
To avoid damaging your diagnostic hardware, observe the following safety guidelines: Opcom Firmware 1.99 Hex File
The firmware is the internal software that controls the OBD2 interface cable. The 1.99.hex file is the machine-readable code that you program onto the PIC18F458 microcontroller inside your Opcom interface, usually via an ICSP (In-Circuit Serial Programming) connector .
Load the Opcom Firmware 1.99 Hex File . Choose the "Write" or "Program" option to flash the new firmware.
: Attempting to "upgrade" or "downgrade" a v1.99 interface using tools like OCflash often results in the "Interface not powered from car" error or a total loss of communication if the hardware doesn't support the firmware's bootloader.
The is a piece of microcontroller code used in cloned Opel diagnostic interfaces. In the enthusiast community, "Firmware 1.99" is widely regarded as a marketing label used by Chinese manufacturers rather than an official incremental update. 1. Nature of Firmware 1.99 Understanding the version numbering is key to navigating
The original Hungarian developer of OP-COM never released an official 1.99 firmware version. Official firmware versions generally peaked around 1.64 to 1.67 for older hardware revisions. Why Does Firmware 1.99 Exist?
: Due to documented hardware limitations, some Opcom boards only support a single, one-time firmware flash. A second attempt may permanently erase the bootloader and brick the device.
Opcom Firmware 1.99 Hex File: Enhancing Your Opel Diagnostic Capabilities
Compatibility and interoperability
Earlier firmwares could read PIN codes but often failed when writing new transponder keys. Firmware 1.99 stabilizes the EEPROM read/write cycles on the CIM module (Column Integrated Module) and the immobilizer box, allowing successful key programming for Astra H, Zafira B, and Vectra C.
Real OP-COM software versions (such as 120309a, 131223d, or newer professional versions) check the integrity of the firmware. A fake 1.99 firmware often causes communication errors, prevents connection to specific control units (like the Engine ECU or Immobiliser), or causes the software to freeze. 3. Lack of Real Features
If the flashing fails, the PIC chip may have been corrupted. You might need to try re-flashing with a stable 1.60.hex first before upgrading to 1.99.