E/E architecture

E/E (electrical/electronic) architecture is the overall design of a vehicle’s electronics: which computers exist, how they communicate, how power is distributed, and where software runs. It is the skeleton every vehicle function hangs on, and one of the longest-lived engineering decisions an OEM makes — a given architecture typically underpins a model generation for close to a decade.

The industry describes an evolution in stages: distributed architectures with up to 150 single-function ECUs on CAN networks; domain architectures that consolidate by function; and zonal architectures that consolidate by location around central compute, connected by automotive Ethernet.

Architecture choices determine what is possible in software. Update capability, feature velocity, cybersecurity boundaries, wiring cost and even vehicle assembly sequence all trace back to the E/E design — which is why architecture announcements from OEMs are treated as strategic news rather than component news.