Quality

Zero-defect,
by design

Quality isn't a final check at YJ Polytec — it's built into every stage, governed by IATF 16949 and verified by precision measurement and 100% leak testing.

Our Philosophy

Quality is our management policy

Three principles, carried from our Korean founders, guide how we run the company day to day.

Law Observance

Operating ethically and in full compliance — with the law, with standards, and with our commitments to customers.

Happiness Company

A safe, motivated and respected workforce is the foundation behind every defect-free part we deliver.

Customer Satisfaction

Delighting our customers through zero-defect quality, on-time delivery and responsive, honest partnership.

Certifications

Independently certified

IATF 16949:2016

Issued by TÜV SÜD

Automotive quality management — injection (2010) & wire harness (2024).

Hyundai SQ Mark

Issued by Hyundai Motor

Supplier Quality Mark for injection & wire harness — Aug 2024.

ISO 14001:2015

Issued by Otabu

Environmental Management System — certified since 2023.

ISO 45001:2018

Issued by Otabu

Occupational Health & Safety Management System.

Instruments

Measured with precision, at every step

Our in-house metrology lab keeps every division honest — from raw material intake to finished-part inspection.

Coordinate Measuring Machine

Video Measuring Machine

Cross-Section Terminal Cutting & Grinding Machine

XRF Analyzer

Moisture Analyzer

Melt Flow Index Tester

Digital Tensile Testing Machine

Gloss Meter

Thickness Gauge

Digital Vernier Caliper

Digital Micrometer

Digital Height Gauge

Digital Lux Meter

How We Ensure It

Quality built into every stage

In-Process InspectionIATF-driven checks at every stage — from raw material to dispatch.

Precision MeasurementA dedicated, controlled environment for accurate dimensional checks.

Air-Pressure Leak Test6 dedicated lines verify a sealed assembly on every welded part.

Central Monitoring RoomReal-time visibility of the whole factory floor and its operations.

ERP TraceabilityMaterial managed and traced through the ERP system end to end.

Quality you can audit, not just trust.

Request our certificates or arrange a plant visit — we'll be glad to show you the floor.

Zero-defect,by design