Inzi Controls Co., Ltd.

Company Profile



171, Gunjacheon-ro, Siheung-si, Gyeonggi-do, Korea

Business Overview

-The Company mainly supplies cooling system components, engine management system components, sensors, switches, and engineered plastic components.

-In Korea, the Company has a more than 85 percent share of the engine cooling systems market, which includes thermostats, coolant temperature sensors, and coolant temperature controllers.

-The Company has over 40% of the market share in Korea of engineering plastic parts such as cylinder-head covers, air-intake manifolds, valve-body covers and others.


(As of December 31, 2022)
Major Shareholders Interest Ratio (%)
Jung, Goo Yong 18.38
Jung, Jang Hwan 5.40
You-Tech Solution 14.08
Total 37.86


Thermal Management System
-Coolant control valves
-Thermostat housing assemblies
-Electric thermostats
-Bypass valves (engine oil/ATF)
-Coolant temperature sensors

-Battery cases
-FCEV coolant temperature sensors
-Battery thermal management parts

EP (Engineered Plastic)
-Cylinder head covers
-Air cleaners
-Air intake manifolds
-Valve body covers

-Knock sensors
-Temperature sensors
-Pressure relief valves
-Solenoid valves
-Vacuum actuators
-Solenoid valve integrated vacuum actuators
-Fuel pressure regulators
-Oil pressure switches


Jan. 1978 The Company was established.
Dec. 1986 The Company completed production plant in Ulsan.
Aug. 1988 The Company completed production plant in Ansan.
Jul. 1989 The Company established its R&D Center.
Apr. 1992 The Company formed a technical alliance with Robert Bosch GmbH of Germany.
Aug. 1992 The Company started operations at the Gyeongju plant.
Aug. 1995 The Company started operations at the Shihwa headquarter plant.
Jun. 1997 The Company went public, listing on the Korea Stock Exchange.
Jan. 2001 The Company adopted a new company name, Inzi Controls Co., Ltd.
Jul. 2004 The Company started operations at the Okcheon plant
Jun. 2005 The Company established Tianjin Inzi Automotive Co., Ltd. in China.
Jun. 2005 The Company turned Snowcraft (M) Sdn, Bhd in Malaysia into its subsidiary company.
Apr. 2006 The Company turned Penta Daewha Auto Parts Ltd. in India (currently Inzi Controls India Ltd.) into its subsidiary company.
Sep. 2006 The Company changed the name of "Penta Daewha Auto Parts Ltd." in India to "Inzi Controls India Ltd."
Dec. 2009 The Company established Inzi Controls Alabama. Inc. in Alabama, U.S.A.
Mar. 2014 The Company established Inzi Controls Detroit, LLC in U.S.A.
Feb. 2018 The Company established INZI AUTO COMPONENTS AN PRIVATE LIMITED in India.
Nov. 2018 The Company established INZI CONTROLS HUNGARY LLC in Hungary.

Supplemental Information 1