The two Japanese automakers have signed a joint development pact, a fresh collaboration that follows the collapse of their previously planned merger last year. Under this new agreement, the companies aim to equip their production vehicles with a unified vehicle architecture, featuring jointly developed systems and software, starting in the fiscal year that begins in April 2029.

In this partnership, Nissan Motor Co and Honda Motor Co have reached a deal to co-develop the core systems and software that will define the next generation of automobiles. This initiative comes after their earlier merger discussions fell through, prompting the two firms to pivot toward a technical collaboration instead.

The companies announced the signing of this joint development agreement on Monday, outlining their goal to roll out the jointly developed architecture across their respective models from the fiscal year starting April 2029. By standardizing these critical technologies, both automakers believe they can pool their engineering expertise and resources, thereby cutting research and development costs and achieving greater economies of scale to bolster their competitive edge.

Both parties highlighted that software, which plays an increasingly vital role in vehicle intelligence and electrification, has been designated as a key focus area of this partnership, given the rapid pace of technological advancement. The agreement builds on earlier discussions initiated more than two years ago, when the two companies first expressed interest in exploring collaboration around electric vehicles, core components, and software.

As strategic partners, the two manufacturers have also indicated they will continue to investigate additional opportunities for cooperation in other domains. However, the road to collaboration has not been without its hurdles. In December 2024, the pair publicly unveiled a merger proposal, only to terminate those negotiations in less than two months. The breakdown occurred because Honda had sought to make Nissan a subsidiary, a condition that ultimately derailed the deal.