PT Sumi Indo
Wiring Systems
Engineering precision wiring harness and assembly solutions for 2-wheeled and 4-wheeled vehicles — powering the future of Indonesian automotive manufacturing.
Precision Engineering
Since Day One
PT Sumi Indo Wiring Systems (SIWS) is a leading manufacturer specializing in the production of Wiring Harness and Wiring Assembly Systems for 2-wheeled and 4-wheeled vehicles. With a strong commitment to quality, innovation, and reliability, we ensure every product meets the highest industry standards.
We operate with advanced technology, strict quality control, and an experienced workforce to deliver efficient and durable wiring solutions for the Indonesian automotive industry. Our facilities span two dedicated production plants equipped with state-of-the-art machinery.
Our Capabilities
End-to-end production
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Auto Cutting & Crimping High-speed precision cutting and crimping machines
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Welding (HF, Ultrasonic, Spot) Advanced welding technologies for durable assemblies
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Quality Checker Systems Automated inspection and testing equipment
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Multi-Plant Operations Two dedicated production facilities
Vision & Mission
Our Vision
To become a leading and globally recognized manufacturer of automotive wiring harness systems, delivering innovation, reliability, and sustainable solutions that drive the future of mobility in Indonesia and beyond.
Our Mission
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Manufacture world-class wiring harness products with precision and consistency.
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Build long-term partnerships through exceptional QCD (Quality, Cost, Delivery) performance.
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Foster a culture of continuous improvement and technological innovation.
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Uphold the highest standards of safety, ethics, and environmental responsibility.
Our Core Values
The principles that guide every decision and action at PT Sumi Indo Wiring Systems.
Quality
Every product is manufactured with precision and subjected to rigorous quality controls that exceed international standards.
Safety
We maintain a zero-compromise approach to workplace safety and product safety standards across all operations.
Innovation
Continuously adopting advanced technologies and processes to stay ahead in automotive wiring manufacturing.
Reliability
Our customers trust us to deliver on time, every time. We uphold our commitments with consistency and integrity.
Our Products
High-quality wiring harness and assembly systems engineered for optimal performance in all vehicle types.
2-Wheeler Main Harness
Complete main wiring harness assemblies designed for motorcycles, ensuring reliable electrical connectivity throughout the vehicle.
4-Wheeler Main Harness
Comprehensive wiring harness solutions for passenger and commercial vehicles, built to OEM specifications.
Engine Wire Harness
Heat-resistant and chemically protected harnesses designed for high-temperature engine bay environments.
Body Wire Assembly
Customized body wire assemblies covering lighting, door, and interior electronic systems.
Sub-Assembly Harness
Precision-made sub-harnesses for specific vehicle zones, optimized for easy installation and maintenance.
Custom OEM Solutions
Tailor-made wiring solutions developed in close collaboration with OEM partners to meet unique specifications.