The story of Nissan in Thailand is fundamentally a story of partnership, beginning with the Siam Motors Group, which was founded by Dr. Thaworn Phornprapha in 1952. Initially starting as a trader of new and used vehicles, Siam Motors achieved a historic milestone by becoming Nissan's very first overseas dealer. This marked the beginning of a deep and enduring relationship that would significantly shape Thailand's automotive landscape. The trust placed in this Thai enterprise was further solidified when, in 1962, Nissan's first manufacturing plant in the country was established under the name "Siam Motors and Nissan Co., Ltd." With a modest team of 120 employees and an initial production capacity of just four cars a day, this venture laid the cornerstone for what would become a major industrial force. The significance of this partnership was royally recognized in 1972 when His Majesty King Bhumibol Adulyadej graciously granted the prestigious Royal Garuda Emblem to Siam Motors Group, a testament to the company's good governance and contributions to the nation's development .
For decades, Nissan's operations in Thailand have been a vital component of the national economy, not only for domestic consumption but also as a significant export hub. The Siam Motors Industrial Center, located on Bang Na–Trat road, was developed to serve as a manufacturing plant for Nissan pick-ups intended for export, showcasing the high-quality standards of Thai manufacturing to the world . This facility, along with subsequent investments, positioned Thailand as a key node in Nissan's global production network. The company's long-standing commitment to local production has created a robust supply chain and provided employment for thousands of Thais, fostering skill development and technological transfer that have benefited the broader automotive sector. Vehicles produced in Thailand, such as the popular Navara pickup, have been exported to over 100 countries worldwide, underscoring the plant's importance to the company's regional and global strategy .
In mid-2025, Nissan Thailand embarked on a significant strategic transformation known as the line integration project, a key part of its global "Re:Nissan" turnaround plan. This involved consolidating vehicle assembly operations from its two long-standing factories in Samut Prakan province. Plant #1, which had been in operation since 1975 and produced over 2.5 million vehicles, ceased its vehicle assembly line. Its role was transitioned to focus on body, plastic, and press shops, as well as operations logistics. Meanwhile, all vehicle assembly was concentrated and upgraded at the newer Plant #2. This move was designed to optimize fixed costs, enhance competitiveness, and create a more flexible and efficient production line ready for the localization of future models, including those with new-generation powertrains .
The completion of this line integration in September 2025 was celebrated as a major milestone, reinforcing the company's long-term dedication to Thailand. Toshihiro Fujiki, President of Nissan Thailand and ASEAN, emphasized that this transformation would enable the company to adapt swiftly to changing market conditions and drive sustainable growth in the region. The upgraded, integrated line is now responsible for producing key models for the Thai market, including the Almera, Kicks e-POWER, Navara, and Terra . Importantly, the project was executed with a strong vote of confidence in the skilled Thai workforce, and the ceremony was attended by top executives from their long-standing partner, the Siam Motors Group, highlighting the continued strength of that foundational relationship. This strategic move was also welcomed by the Federation of Thai Industries as a positive sign that could support the supply chain and employment during a challenging period for the auto sector .
The path forward is not without its challenges. The automotive market in Thailand is undergoing a profound structural shift, with a rapid transition towards electrification. Government subsidies for electric vehicles have spurred an influx of Chinese automakers, such as BYD, who are aggressively capturing market share. This new competitive landscape has put pressure on long-dominant Japanese manufacturers. In this environment, Nissan's sales in Thailand have declined significantly, with the company holding a market share of just 1.7% in the first ten months of 2024, a stark contrast to the market leader . This sales pressure has reportedly led to workforce adjustments, with plans to reduce staff numbers as the company rightsizes its operations to match current demand and prepares for its future product roadmap .
Nissan is charting a course to navigate this transition. The company has confirmed to Thailand's Board of Investment its intention to continue investing in the country, with future plans focusing on hybrid electric vehicles . The newly integrated and flexible production line in Samut Prakan is specifically designed to prepare for the localization of these future models, indicating that Nissan's strategy involves leveraging its Thai manufacturing base to produce electrified vehicles tailored to the market. While facing stiff competition and a need to revitalize its model lineup and sales, Nissan's deep-rooted history, its commitment to its partnership with Siam Motors Group, and its recent strategic investments in production efficiency demonstrate a clear intent to remain a significant player in Thailand's evolving automotive industry.