Most "free" downloads of VAG Tacho 2.5 or 3.0 on torrent sites contain keyloggers, ransomware, or viruses. The legitimate software requires a hardware dongle.
"VAG Tacho is a legacy tool for 1995-2005 VW/Audi/Seat/Skoda vehicles. While often associated with odometer correction, its legitimate use is for replacing broken instrument clusters and programming replacement keys. Note that modern cars require dealer-level tools, and tampering with an odometer for fraud is a serious criminal offense." vag tacho software
If you are writing an article or making a video, use these terms: Most "free" downloads of VAG Tacho 2