Nissan and Honda have concluded a joint development agreement to standardize multiple core electronic control units (ECUs) and the software running on them for next-generation software-defined vehicles (SDVs), with the resulting E/E architecture planned for application in both companies’ vehicles from fiscal year 2029 onward. The scope covers the in-vehicle operating system, key parts of the middleware, and vehicle control software alongside the ECU hardware itself. Honda and Nissan describe the SDV software domain as key to vehicle intelligence and electrification, and say the standardization is intended to improve R&D speed and investment efficiency.
Highlights
- Fiscal 2029 target: The E/E architecture incorporating the jointly developed ECUs and software is planned for both companies’ next-generation SDVs from fiscal year 2029 onward.
- Two ECU classes in scope: Common specifications will cover high-performance main ECUs — high performance computers built on SoCs — and zone ECUs that oversee each area of the vehicle.
- Software layers included: The in-vehicle operating system, key parts of the middleware, and vehicle control software all fall under the agreement.
- Stated rationale: The companies say standardization will reduce development costs and produce greater economies of scale.
What Nissan and Honda Will Standardize
Under the agreement, the two automakers will establish common specifications for multiple core ECUs within the E/E architecture of their next-generation SDVs. The scope extends past the silicon to the software stack layered on it — the in-vehicle operating system, key parts of the middleware, and the vehicle control software that runs on those units.
The companies define the units in question as high-performance main ECUs, described as high performance computers using SoCs, together with zone ECUs that oversee each area of the vehicle. Both categories sit at the center of the E/E architecture the two companies plan to share.
Why Standardize the Software Layer?
Nissan and Honda say the software domain centered on SDVs was identified as an important area of collaboration within their existing strategic partnership, citing the pace of technological innovation and the need to strengthen competitiveness through faster development cycles and more efficient investment. The two companies conducted extensive studies on potential collaboration in the software domain before agreeing to jointly develop and standardize the core ECUs and software.
By pooling engineering expertise and development resources on these foundational technologies, the companies say they expect improved efficiency, accelerated innovation, reduced development costs, and greater economies of scale.
Where the Partnership Goes Next
The agreement sits inside a broader strategic partnership under which Nissan and Honda continue to explore collaboration across a range of areas. The companies frame that work around two stated objectives: accelerating progress toward carbon neutrality, and working toward a future with zero traffic fatalities involving their vehicles.
Both automakers say they intend to build on their respective strengths and deepen the collaboration further, though the announcement identifies no additional joint programs beyond the ECU and software standardization work.
