It acts as an encryption and decryption bridge for data stored on these chips. Because vehicle manufacturers often encrypt data like mileage, VIN, and immobilizer codes
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The is a specialized automotive diagnostic tool used primarily for repairing and reconfiguring VDO instrument clusters . It is designed to work with the 93c86 EEPROM chip , which stores critical vehicle data such as mileage, VIN numbers, and immobilizer codes in a cryptographically protected format. Understanding the 93c86 EEPROM It acts as an encryption and decryption bridge
Some aftermarket tools claim to read, write, or decrypt the contents of a 93C86 chip—often to bypass radio codes or immobilizer systems. It is designed to work with the 93c86
The Dejavu tool is also heavily referenced as a piece of software protected by a hardware dongle (a physical USB key for copy protection). Many online discussions show individuals searching for "cracked" versions or "dongle emulators" of the software.
The hard work done by the DejaVu group and others (like the MAMEdev team) has largely been integrated into modern emulators and ROM management tools.