Disable Windows Driver Signature Enforcement on Windows 8/10/11. Also temporarily disable Windows Defender or any antivirus —these tools flag VAG Tacho as a hacktool (false positive). Create a system restore point before proceeding.
In the software, select your specific ECU type from the menu. If the ECU type is unknown, use the "Connect Any Tacho" button to identify the instrument cluster automatically. Once identified, click "Connect Selected ECU" to enable functions like reading PINs or changing mileage. SOS Autokeys Troubleshooting Common Issues
The quality of your installation is heavily dependent on the interface hardware. VAG Tacho 5.0 is software, but it requires a specific cable to communicate with the car.