Run pcmflash.exe as an Administrator.
Clone dongles are attractive because of their low entry price, but this comes with considerable risks, which we will cover in the safety section below.
For professional workshops, investing in the (1.4.6 as of May 2026) of PCM Flash is the only safe and future-proof path, as it provides ongoing updates, technical support, and the reliability required to avoid damaging expensive vehicle control modules. Always verify the integrity of downloads, scan executables for viruses, and respect the intellectual property laws that protect the developers of these specialized tools.
If you specifically need version 1.20 of a particular tool, here is the safe path: Pcm Flash 1.20 Download
Specifically for Bosch MG1 ECUs found in Ford petrol engines, supporting full read, write, and checksum correction. Module 74 (Toyota/Lexus Gen 3):
Version 1.20 is largely out of circulation from its developer and is now primarily found within third-party software packages and forums.
In this article, we will explore everything you need to know about the , including its features, potential risks, legitimate alternatives, and a step-by-step guide to using it correctly. Run pcmflash
: Before using any software, ensure that you have the necessary permissions and follow all applicable laws and regulations. Additionally, be aware that modifying ECU data can potentially damage your vehicle's engine or other components. Proceed with caution and at your own risk.
Module-based; buy only the specific vehicle protocols you need
A: No. It supports most 1996–2018 vehicles, but newer ECUs with secure boot (e.g., Bosch MG1, MEDC17.9) require newer software and tokens. Always verify the integrity of downloads, scan executables
: Supports OBD, Bench, and Boot protocols, allowing you to access many ECUs without physical removal.
Using the software involves a clear and linear workflow. The general process is outlined below:
Free versions almost always fall into two categories:
Highest risk factor due to physical manipulation of internal electronic components. Essential Best Practices for Safe ECU Flashing