Honda, Nissan, and Mitsubishi Advance Standardization of Next-Gen ECUs and In-Vehicle Systems

Honda, Nissan, and Mitsubishi have entered final negotiations to standardize the electronic control unit (ECU) for their next-generation vehicles and jointly procure this critical component. As the hardware platform enabling key software-defined vehicle (SDV) functions such as autonomous driving and in-vehicle infotainment systems, ECU standardization is expected to significantly reduce development and production costs. The three automakers collectively sold 7.3 million vehicles globally in fiscal year 2025. By harmonizing ECU specifications and scaling up joint procurement, they aim to enhance cost competitiveness against Chinese automakers and Tesla, who currently lead in the SDV space. While Honda and Nissan still need to finalize certain terms, both companies plan to reach an agreement within the coming weeks. If the collaboration materializes, vehicles equipped with standardized ECUs could hit the market as early as 2029–2030. The new standard will apply not only to battery electric vehicles (BEVs) but also to hybrid models. Mitsubishi will contribute partial funding for development, and the three parties will formulate a comprehensive framework covering joint R&D and centralized procurement. Additionally, Honda and Nissan are discussing standardization of their in-vehicle operating systems to further boost SDV development efficiency. The trio is also advancing a North American joint production agreement, under which Nissan will supply pickup trucks to Honda and Mitsubishi, and all three will co-develop large-size vehicle platforms. Previously, Honda and Nissan had announced plans during the fiscal year ended March 2024 to explore collaboration on foundational vehicle software and initiate joint technical research. The two companies launched merger talks in December 2024 but terminated them in February 2025, subsequently shifting toward project-based cooperation. For the fiscal year ending March 2025, Honda reported a net loss of JPY 423.9 billion (approximately USD 2.62 billion)—its first annual loss since going public—while Nissan posted a net loss of JPY 533 billion, marking its second consecutive year of substantial losses, primarily due to challenges in executing its electrification strategy.