Company Profile

ZoneOne Company

Established in 2004, ZoneOne Company (a subsidiary of UNITED STARS INDUSTRIAL CO., LTD.) is an industrial entity located in Ningbo, China. We specialize in the research and development, manufacturing, and supply of various automotive parts and accessories, including alternators, starters, and their components.

After more than 21 years of successful growth, we have expanded our services since 2013 from manufacturing to supply chain management. We now offer comprehensive solutions for rotating electrical systems, as well as drivetrains, braking systems, and thermal management parts for a wide range of on-road and off-road vehicle applications.


  • Our Vision

To be the most preferred vendor of our customers' choice, consistently delivering better quality alongside exceptional service.

  • Our Mission

To be the most respected company among our valued partners.

  • Our Values

We uphold integrity by doing the right thing and maximizing the long-term interests of our common partners. We are committed to being industrious, frugal, dedicated, reliable, and respected.


Engineering & Quality Excellence

Committed to Universal Compatibility

Over the past 21 years, we have reverse-engineered more than 13,000 products across diverse Original Equipment (OE) replacement systems, providing solutions for all vehicle makes and models.


Uninterrupted Production and Quality Assurance 

The Company produces and exclusively owns over 150 pieces of tooling annually without interruption. Each product undergoes rigorous testing and meets stringent assembly standards before being prepared for shipment. “Service Is the Best Part” embodies the Company’s core mission and commitment to exceeding customer expectations.

Commitment to Continuous Improvement 

Continuous improvement is ingrained in the Company’s daily operations. Our quality management system complies with IATF 16949 and ISO 9001 standards, implemented across all exporting facilities. Through strict adherence to Standard Operating Procedures (SOPs), we ensure compliance with quality standards and process controls at every stage of production.

4800 +

SKUs ALTERNATORS

2900 +

SKUs STARTERS

1200 +

WHEEL HUBS&BEARINGS

300 +

NOx SENSORS

Testing Documentation 

Evidence of testing for each completed unit is provided and included in its individual packing box.

Rapid Sample Development 

Based on customer input, the first sample can be delivered to customers within 60 days of development initiation for their approval process.

Below is a glance of testing programs carried out in house.

Dynamic Vibration Testing

ZEISS Coordinate Measuring Machine

Noise Test Chamber

High&Low Temp Ambient Test

Torque Test

NVH TEST

High&Low Temp Humidity Chamber

Dynamic Mud Test

Performance End Test

Efficiency Test

Dust Test

Salt Spray & Durability Testing

By achieving above rigorous testing, the customers are always happy with the sales of services to their end users of products.

Exceptional Service

Exclusive Supply of OE Genuine Parts

Nationwide Sales Network and Partnerships

Thanks to our well-established national sales network in China, the Company serves as a vital Authorized Agent for numerous world-class OE brands. Whether it's BOSCH (SEG), DENSO, HITACHI, MITSUBISHI, VALEO, or others, we represent the most recognized names in the market.

Download link for international brands and product lists >

Efficient Distribution and Global Accessibility

From our central and regional warehouse distribution facilities, tens of thousands of OE products are regularly stocked and shipped daily to every corner of the country. Now, international buyers can also benefit from this extensive availability, accessing a profitable and diverse product portfolio.

Write to us today for further information >