Hutool 3.9 (and its rebranding as ) introduced critical capabilities for handling newer vehicle integration levels (I-Steps) and head unit management. While Hutool also refers to a popular Java utility library, the specific version "3.9" is most famously associated with the BMW engineering tool release. Key New Features in Hutool 3.9
: For cloud-based interactions, it offers better automated management of cookies across multiple requests within a single session. hutool 39 new
: Enabling hidden features like Apple CarPlay, Android Auto, or custom navigation maps. Hutool 3
: When moving an NBTevo unit from a donor car to a new one, Hutool 3.9 can reset the unit's identity to match the new VIN. : Enabling hidden features like Apple CarPlay, Android
: This is considered the most critical addition. It allows users to "wipe" the EEPROM of an NBTevo unit, which is essential when installing a used head unit into a different vehicle or recovering a unit after a failed firmware update.
The 3.9 update brought several "exclusive" functions designed to simplify complex retrofitting tasks: