In the modern automotive landscape, a vehicle is no longer merely a mechanical assembly of pistons, gears, and axles. It is a network of embedded computers. For owners of vehicles from the Volkswagen Auto Group (VAG)—including Audi, SEAT, Škoda, and Porsche—one tiny, silent component holds the keys to mileage, component protection, and immobilizer functions: the (Electrically Erasable Programmable Read-Only Memory). Accessing this chip requires a specialized tool known as an EEPROM programmer , and a common target for such operations is the 24C128 (often colloquially referred to by its 128-kilobit capacity, or “120” in shorthand).
: Often used to read the Secret Key Code (SKC) or Login Code required for programming new keys or syncing new instrument clusters. Odometer Correction vag+eeprom+programmer+120