He never charged for tuning files. He charged for his time, his labor, his honesty. But the maps themselves? Those stayed free.
To effectively use a free database, you typically need the following:
ECU brand (e.g., Bosch, Siemens, Marelli) and specific hardware numbers (e.g., EDC16, EDC17).
Modifying your vehicle's ECU software carries significant risks, including potential engine damage, transmission failure, and the voiding of your manufacturer's warranty. Using "free" files from the internet carries the additional risk of malware or incompatible software that could brick your ECU. This guide is for educational purposes only.