Seojin
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About Seojin Automotive
Seojin Automotive is a South Korean auto parts manufacturer with roots going back to 1966. Part of the larger SECO Group, the brand has spent nearly six decades establishing itself as a specialist in powertrain and drivetrain components, earning a reputation as one of Korea's foremost clutch and transmission parts producers. Today, Seojin operates globally, supplying major automakers and aftermarket customers around the world.
A Legacy Built on Clutch Expertise
Seojin's core identity is rooted in clutch technology. The company produces and supplies a comprehensive range of clutch-related components, including clutch covers, clutch discs, clutch facings, and flywheels for both passenger cars and commercial vehicles. On the automatic transmission side, Seojin manufactures wet clutches, brake bands, separator plates, lockup dampers, drive plates, park pawls, signal plates, spring packs, and drums — covering virtually every friction-critical component inside a modern automatic gearbox.
For manual transmission vehicles, Seojin's clutch covers are engineered for high durability with a compact design that uses a minimal number of components. Their heavy-duty variants are specifically designed for vehicles with frequent clutch use and heavily loaded boosters, making them suitable for everything from daily commuters to commercial trucks.
Powertrain Innovation and OEM Credentials
Seojin Automotive holds ISO 9001, QS 9000, and single PPM quality certifications, reflecting a commitment to manufacturing precision that meets the exacting standards of global automakers. The brand has long served as an OEM supplier to Hyundai Motor, Kia Motors, Dongfeng Yueda Kia, and Beijing Hyundai, among others — a testament to the engineering integrity built into every part.
Beyond traditional clutch and manual transmission parts, Seojin has expanded its product portfolio to include automatic transmission components, engine parts, high-performance clutch kits, and powertrain components for electric vehicles — positioning the brand at the forefront of the industry's shift toward electrification.
Global Manufacturing Footprint
Seojin's manufacturing operations span multiple continents. In addition to its headquarters in Siheung, Gyeonggi-do, South Korea, the company operates wholly-owned facilities in Zhangjiagang, China, where production of clutch covers, clutch discs, and flywheels serves regional automakers. The SECO Group's international network extends to Mexico, the United States, India, Vietnam, and the Czech Republic, ensuring consistent supply and quality control regardless of where in the world a vehicle is assembled or serviced.
Why Choose Seojin Parts?
- Decades of OEM supply experience with Hyundai, Kia, and other leading automakers
- Comprehensive clutch system coverage: manual, automatic, and high-performance applications
- Certified to ISO 9001, QS 9000, and TS 16949 quality standards
- Expanding EV powertrain product lineup for next-generation vehicles
- Global manufacturing infrastructure for reliable availability and consistent quality
Whether you are rebuilding a manual gearbox, overhauling an automatic transmission, or sourcing OEM-spec engine components, Seojin Automotive brings the precision and reliability of a tier-one supplier to every part in their lineup.