Remember: With great power comes great responsibility. Do not use this knowledge for odometer fraud—it is illegal in most jurisdictions. Use it to repair, restore, and resurrect dead clusters after battery failure. That is the true spirit of automotive electronics.
Non-volatile memory (like the 93C66) that stores vehicle-specific data such as immobilizer codes and battery status [Source: MEMSFlasher]. battery+eeprom+works+327+full+free