OEM Wire Harness | Premium Automotive & Industrial Wiring Solutions

Who We Are

Qingdao Hainr Wiring Harness Co., Ltd. was founded in Qingdao, China in 2007. Since our inception, we have been designing and manufacturing dependable and custom wiring harnesses built to meet the exacting standards of global OEMs and aftermarket suppliers.

Specializing in automotive, heavy equipment, truck, and industrial applications, we deliver high-reliability solutions for engine systems, GPS monitoring, fuel injectors, and more. Our engineering team works closely with clients to deliver custom configurations with fast turnaround.

Established in 2007 in Shandong, China
ISO9001:2015 Certified Manufacturing
Custom Design & ODM Support
Global Export to 50+ Countries

Quality Control

Every wire harness undergoes rigorous inspection and testing to ensure reliability in extreme environments.

ISO9001:2015 Certified

Our production lines follow strict international quality standards for consistent performance and reliability.

100% Testing

Each harness is tested for continuity, insulation resistance, and environmental durability before shipment.

Traceability

Full batch tracking and documentation ensure complete traceability from raw materials to final product.

Our Products

Custom-engineered wire harness solutions for automotive, industrial, and heavy machinery applications.

CAT 153-8920 OEM Wire Harness

Unit Injector Wiring Harness for Caterpillar engines

Brand: Hainr
Certification: ISO
Application: Automotive, Farm Machinery

DT06-3S-EP06 Connector

Automotive Plugs and Sockets, Waterproof

Type: 3 Pin, 250V
Pitch: 10.01mm
Application: Automotive, Industrial

Heavy Equipment 257-4183

OEM Wire Harness Kit for Chassis

Model: 257-4183
Application: Excavators, Construction
Standard: ISO9001

Cummins 6754-81-9450

Fuel Injector Wiring Harness Cables

Compatibility: Cummins Engines
Certification: ISO9001
Application: Trucks, Industrial

PC400-8R Engine Harness

For Komatsu Excavator Systems

Model: PC400-8R
Application: Komatsu Excavators
Brand: Hainr

OEM Universal Engine Harness

For Construction Machinery

Place of Origin: Shandong, China
Type: Wireharness
Customization: Available

22347607 Diesel Injector Harness

For Volvo Truck Engine Systems

Application: Volvo Trucks
Certification: ISO
Brand: Hainr

2 Pin Waterproof Connector

6189-0890 & 12162197 Models

Type: Automotive, Industrial
Feature: Waterproof Plastic Shell
Gender: Male & Female Options

View All 190+ Products

Frequently Asked Questions

Can you customize wire harnesses for specific OEM models?

Yes, we specialize in OEM and ODM custom wiring harnesses. Our engineering team can replicate or design harnesses for specific vehicle or machinery models with full documentation and testing.

What certifications do your products have?

Our manufacturing facility is ISO9001:2015 certified. Many of our products also meet CE, RoHS, and CEA standards depending on application and customer requirements.

What industries do you serve?

We serve automotive, heavy equipment (excavators, loaders), trucking, industrial machinery, medical devices, home appliances, and motorcycle sectors.

What is your minimum order quantity (MOQ)?

MOQ varies by product complexity. For standard items, MOQ can be as low as 100 units. For custom designs, we discuss MOQ during the engineering phase.

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