What is it
KESSY Dump Tool is a compact Windows utility for servicing VAG keyless (KESSY) immobilizer modules. Load an EEPROM/flash dump to view and edit key data, PIN/LOGIN, VIN, immobilizer status and configuration bytes so you can repair corrupted files, enable/disable key slots and prepare modules after replacement.



Highlights

• Reads key set (up to 8 slots) with enable/disable and status editing
• Shows PIN/LOGIN, VIN and IMMO ID fields for quick identification
• Configuration area editing (crypto levels, CFG/PSW, RSC/RCF and related bytes)
• Checksum/consistency repair for corrected dumps (where applicable)
• Simple workflow: Open → Edit → Save — designed for offline bench work
• Works with common programmers (VVDI Prog, Orange5, UPA, etc.) used to read/write the dump

Typical workflow

• Read the KESSY module dump with your programmer
• Open the file in KESSY Dump Tool and review keys, PIN/LOGIN, VIN and configuration
• Edit the required fields (add/clear key slots, fix values, adjust configuration)
• Save the corrected dump and write it back to the module, then test in vehicle

Compatibility notes

• For VAG KESSY immobilizer modules used across VW, Audi, Škoda and SEAT platforms
• Exact fields/behaviour may vary by hardware and software generation — always keep the original backup

Operating systems

• Windows — Windows 7, Windows 8.1, Windows 10, Windows 11

Minimum system requirements

• CPU: dual-core 2.0 GHz or better
• RAM: 2 GB or more
• Storage: 50 MB free space
• Display: 1024×768 or higher
• EEPROM/flash programmer to read/write the KESSY dump

Source and responsibility
Source of Files: All software and resources provided in this post have been collected from public, open sources on the internet. We do not claim to be the original authors or developers of this software.
• File Hosting: This forum does not host any files. All download links point to third-party, publicly available cloud storage services. We are not responsible for the content hosted on external sites.
• User Responsibility: This software is provided for educational and evaluation purposes only. You, the user, assume all responsibility and risk associated with its use. The authors of this post and the forum administration are not liable for any damage to your equipment or data that may result from its use.