Where Can You Find Sumitomo Electric Wiring Systems?

Did you know that automobiles today have a thousand or more connection points for circuits and wires? The central challenge of wiring harness technology lies in designing cost-effective techniques for rapidly and accurately assembling these connections. Developing new technologies and understanding efficient design principles have enabled Sumitomo Electric Wiring Systems to design, develop, and manufacture products the automotive industry wants.

SEWS is an automobile maker’s one-stop-shop for electrical distribution systems, not just components and parts. First, we listen to our customers. We take the time to understand their vision, requirements and specifications – cost, size, performance, quality, and time to market. Then, we use our research and engineering knowledge to develop solutions that are not only innovative, but also affordable. Most importantly, we draw upon our systems expertise to streamline the entire product development process, from concept to prototype to manufacturing and delivery.

Our Products

Superior technologies and product quality is what we offer. It sets our product line apart from the competition. Our products include: Wiring Harnesses, Pipe Harnesses for Hybrid Vehicles, Electric Wire, Connectors, Terminals, Center Panels, Junction Blocks, and Electronic Control Units.

President Aoyama

Wiring Harnesses

Sumitomo Electric Wiring System’s core business since 1987

President Aoyama


Highest quality electronic components for today’s advanced automobiles

President Aoyama

Electrified Vehicle Related Products

New technologies used in electric and hybrid vehicles

President Aoyama


Components … bridging the gap in the harness

President Aoyama

Electric Wire

At the very core of the harness

President Aoyama

Advanced Product Development

Harnessing technology for tomorrow and beyond

Technology drives the future

The evolution of the automobile today has transformed it into a highly technical array of systems and components that are designed to add safety, comfort, fuel economy, luxury, and convenience to the driving experience. SEWS develops and delivers intelligent products for today’s intelligent automobiles through our advanced product development process.


Harness Your Passion
and Talent with SEWS


We are always looking to add talented and motivated individuals to our North American team.

Join SEWS today to drive your future to an exciting and rewarding career!