The 2027 BMW iX3, described as "all new," marks a significant shift in automotive engineering with its innovative four-brain centralized computing architecture, known as Neue Klasse. Unlike traditional vehicle systems that rely on a chain of communication between various suppliers' chips, BMW has developed the iX3's entire system in-house, including the antilock-braking actuator. This design dramatically reduces response times from 10-50 milliseconds to a mere 1 millisecond, promising enhanced driver satisfaction.

Neue Klasse is BMW’s foundational electrical/electronic architecture that will underpin numerous next-generation BMWs across different physical architectures and powertrains. The iX3 SUV, along with its upcoming i3 sedan sibling, is built on BMW's new KKL (compact class) BEV architecture. This architecture incorporates advanced cell-to-pack and pack-to-body construction, similar to Tesla's pioneering methods, where the battery pack is a structural component of the unibody. This integration improves both mass and space efficiency within the vehicle.

A core component of the iX3’s advanced system is the