Products of Automotive Business Unit

Wiring Harness A wiring harness is stretched around every portion of the vehicle, and plays the roles of the blood vessels and nerves in human body. It distributes electric power from battery to the lamps, motors, and computers, and communicates information on speed and temperature, and other data such as sounds and images. As signal transduction and energy transfer in vehicles becomes more enhanced, demand for lighter, safer, and environmentally-friendlier wiring harnesses is increasing. The wiring harness business of SEI Group is being conducted in collaboration with Sumitomo Wiring Systems, Ltd. for the purpose of meeting the requirements of customers in Japan and overseas.

Brake System SEI is the first company to establish a mass-production system for disc brakes in Japan. For nearly 40 years, we have been working toward improvement of product quality. Presently, brake system development and sales functions are consolidated into ADVICS Co., Ltd. and production function is contracted out to Sumitomo (SEI) Brake Systems, Inc. for further expansion of our global business.