The VAG EEPROM Programmer 1.20 is engineered primarily for vehicles built between that utilize K-line diagnostic communications. It does not support newer CAN-Bus or UDS-based systems (such as the Golf Mk5/Mk6 or Passat B6). Supported Vehicle Profiles

When replacing an ECU or transferring one from a donor vehicle, the EEPROM programmer can be used to copy the VIN and other essential data, ensuring the new ECU works properly and interfaces with other vehicle systems.

Disclaimer: This article is for educational purposes. Modifying your vehicle's immobilizer or odometer may violate local regulations. Always consult a professional locksmith for critical repairs.

Connect the programmer to the OBD2 port of the car and the USB port of the computer.

Features a larger, scalable navigation window and a clean, optimized color scheme to prevent reading mistakes. Supported Vehicles & Hardware Requirements

Note: This tool will not work with HEX-V2 or CAN-bus only cables. How to Use the Software (Basic Steps)

The VAG EEPROM Programmer 1.20 is a multi-function tool capable of interfacing with several of the car's primary control modules. Its main applications are:

Allows calibration of the odometer display when replacing a faulty instrument cluster with a used unit.

Always click "File" -> "Save" to keep a backup of your original bin file before hitting "Write." Safety Warnings

While the software runs on older systems like Windows XP and Vista, modern versions are fully compatible with Windows 7, 8, 10, and 11. For maximum stability, a clean installation of is recommended.

When looking for a VAG EEPROM programmer, consider the following:

This article will dissect everything you need to know about the VAG EEPROM Programmer 120—from hardware setup and software configuration to real-world applications like immo defeat and mileage correction.

Clears hard "Crash Data" faults from the SRS memory after airbag deployment. This restores the module to a functional state without requiring physical component desoldering.

Windows operating systems must map the USB cable interface to a specific serial port structure: Connect the KKL cable to your PC's USB port. Open in Windows. Locate the cable under Ports (COM & LPT) . Access Properties -> Port Settings -> Advanced .