Searching for " Ross Tech Vcds 23.3.1 Download 2021 Go to product viewer dialog for this item.
Therefore, 23.3.1 was released in March/April 2023, not 2021. Searches combining "23.3.1" and "2021" likely come from: Ross Tech Vcds 23.3.1 Download 2021
If your interface is an older, genuine Ross-Tech cable (like a HEX-USB), you should be looking for Version 21.3 or 21.9. These are the stable releases for pre-2015 vehicles. Searching for " Ross Tech Vcds 23
Sellers listing "VCDS 23.3.1 download 2021 key" for $15 are selling either: 23.3.1 was released in March/April 2023