- Business
- Sunjin Co., Ltd. (136490.KS) manufactures and sells automotive interior and exterior plastic components, including bumpers, side moldings, spoilers, fenders, and wheel caps; dashboard panels, door trims, and console assemblies; as well as functional parts such as air vents, cup holders, and switch bases. The company provides painting, chrome plating, and welding services for automotive plastics, along with molds and tooling for injection molding processes. Operating primarily in South Korea, Sunjin serves major automakers in the Asia-Pacific region through its production facilities in Chungcheongbuk-do.
Founded in 1988 and headquartered in Jincheon, South Korea, Sunjin focuses on the automotive parts segment of the manufacturing industry, targeting original equipment manufacturers (OEMs) in passenger vehicles and commercial vehicles. Its business spans design, development, and mass production of high-precision plastic injection-molded products, with an emphasis on lightweight materials and eco-friendly manufacturing processes. The company maintains subsidiaries for specialized operations in mold production and surface treatment.
In the past two years, Sunjin has expanded its production capacity through investments in new injection molding lines at its Jincheon plant to meet rising demand for electric vehicle (EV) components. The company formed a strategic partnership with a leading Korean battery maker in 2024 to supply plastic casings for EV battery modules, marking its entry into the electrification supply chain. Additionally, Sunjin launched a new line of sustainable bio-based plastic parts in early 2025, aligning with global automotive trends toward reduced carbon emissions.