used to launch the software) as a false positive and will delete it.

Run the VCDS-Release-21.9.0-Installer.exe . Follow the prompts, but do not launch the program once finished.

VAG vehicles receive constant software updates. A car built in 2023 may have a control module that VCDS 21.9 cannot properly communicate with. You will be stuck with an outdated tool that cannot code new features or diagnose recent fault codes.

The VCDS 21.9 loader install performed well on our test system, which was running Windows 10. The software loaded quickly and was responsive to user input. We tested the software with several different vehicles, including a 2022 Volkswagen Golf and a 2020 Audi A4, and were able to access all of the diagnostic features without any issues.

To prevent the loader or software from being blocked or deleted, follow these precautions:

If you’re just tinkering with one car, consider buying a genuine Ross-Tech VCDS ($199–$299). It works forever, updates freely, and supports the developers.

Ross-Tech’s genuine cables have galvanic isolation and proper voltage regulation. Clones do not. One voltage spike during a flash or adaptation can destroy a $1500 ECU.