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, water temperature sensors, and water 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, 2017)
Major Shareholders Interest Ratio (%)
Jung, Goo Yong 18.59
You-Tech Solution 12.44
Jung, Jang Hwan 9.80
Total 40.83



Cooling systems

Adjustable electronic thermostats
Water temperature control assemblies
Thermo switches

Engineering plastics
Cylinder head covers
Plastic air intake manifolds

Fuel deliveries
Fuel pressure regulators
Pulsation dampers
Fuel tank pressure sensors
Fuel rails

Vacuum actuators
Manifold absolute pressure sensors
Manifold absolute pressure and temperature sensors
Purge control solenoid valves
Air control solenoid valves

Oil level switches
Knock sensors
Dual sensors
Temperature sensors
Water sensors
PTC heaters
Group sensors
Oil pressure switches


Brake parts

Vacuum switches
Low air switches
Brake check valves

Solenoid actuators
Shock absorber solenoid actuators
Bi-stable solenoid actuators
Electronic control air suspension solenoid valves

Air cleaners
Air cleaner assemblies

Thermal elements
Temperature sensors

Glass antenna modules
Micro antennas
T-DMB pole antennas
Film antennas
Shark fin antennas
Cable assemblies


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.

Supplemental Information 1