Dosco

What Dosco does

DOSCO Co., Ltd. is a privately-held South Korean precision automotive parts manufacturer founded in 1985 and headquartered at the Asan Techno Valley facility in Chungcheongnam-do. The company designs and produces super-precision machined components — including shafts, pistons, sleeves, spool valves, pin valves, VCT inner plates, flux cores, and solenoid cores — for engine management, variable camshaft timing, and automatic transmission solenoid systems. Manufacturing is built around CNC screw machining (119 units), CNC turning centers, tapping centers, and centerless grinding (19 units) — totaling 184 production machines — supported by carbonitriding heat treatment, automated vision-based inspection across 450+ measuring devices, and an MES deployed in 2016. Quality is anchored to IATF 16949:2016 certification and a 0.14 PPM reject rate across 43.2 million units shipped in 2023.

Its business model is B2B enterprise field sales of custom quote-based precision parts, with pricing determined per specification and customer agreement under multi-year contracts. Dosco supplies directly to global automotive tier-1 suppliers and OEMs — BorgWarner (since 1998), AISIN (2004), NSK (2009), AAM (2015), SLPT/UK, HKMC (1986), Woodward, and Kolektor — across the USA, Germany, Japan, China, Mexico, and the UK. Approximately 95% of FY2023 revenue (disclosed at $36.5M USD) is generated from exports. The company has no disclosed subsidiaries, no M&A history, no funding rounds, and remains founder/owner-managed with no public listing or known institutional ownership.

Name

Dosco

Legal name

DOSCO Co.,Ltd.

Website

https://idosco.com

Company type

Private

Founded year

1985

Operating status

Operating

Headcount range

101–250 employees

Short description

DOSCO is a South Korean precision automotive parts manufacturer producing super-precision shafts, pistons, sleeves, valves, and transmission components for global tier-1 suppliers BorgWarner, AISIN, NSK, AAM, and HKMC, with 95% export revenue and $36.5M FY2023 sales.

Ownership category

akta.pro rank

Headquarters

HQ city

Asan

HQ country

South Korea

HQ region

Asia

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Personnel, Operations, Supply Chain, Technology or R&D, Infrastructure

Revenue model

1. Automotive Parts Manufacturing: Design, development, and manufacturing of precision automobile components including shafts, pistons, sleeves, valves, and other precision-machined parts for global automotive manufacturers
2. Export Revenue: 95% of revenue generated from exports to global automotive markets including USA, Germany, Japan, China, Mexico, UK

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels2 records

Core offering

DOSCO designs, develops, and manufactures super-precision machined automotive components including shafts, pistons, sleeves, pin valves, spool valves, VCT inner plates, flux cores, and solenoid cores for engine management and transmission systems. The company supplies these custom precision parts directly to global automotive Tier-1 suppliers and OEMs under multi-year contracts, with 95% of revenue generated from exports.

Product overview

Dosco is a precision automobile parts manufacturer specializing in super-precision manufacturing technology for the automotive industry. The product portfolio consists of Engine Management System components (Inner Plate, Piston, Shaft) and Transmission System components (MDA Sleeve, Pin Valve, Spool Valve), along with additional valve and shaft products. These precision-machined components are supplied to major global automotive suppliers including BorgWarner, AISIN, NSK, AAM, and SLPT, with 95% of revenue generated from exports. The company operates 184 machines including CNC screw machines, turning centers, and grinding equipment, and maintains IATF 16949:2016 certification for quality management.

Differentiator

Problem solved

Functional benefit

Products and services

• Shafts
• Pistons
• MDA Sleeves
• Spool Valves
• Pin Valves

Quantifiable outcome

• Single PPM quality level achieved - 0.14 PPM reject rate in 2023 (6 rejections out of 43.2 million units)
• +3 more outcomes

Named customers8 records

Segments1 record

Ideal customer profiles1 record

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Six partnerships are on record, tiered major and core.

• AAM (American Axle & Manufacturing)majorStrategic or Co-development Partner · 1 January 2015Partnership started in 2015 for differential stub and pinion shafts for GM/Ford applications. Developed custom components for drivetrain systems.
• SLPT (UK)majorStrategic or Co-development Partner · 1 January 2014Partnership for tandem pump shafts for Jaguar applications in the UK market.
• NSKmajorStrategic or Co-development Partner · 1 January 2009Partnership for supplying spacers since 2009. Recognized as Supplier of the Year 2014. Products used in Toyota and Honda applications.
• AISIN (アイシン精機)coreStrategic or Co-development Partner · 1 January 2004Partnership established in 2004 for supplying shafts and rod valves for AISIN's automotive transmission products used in Toyota and Nissan vehicles.
• BorgWarnercoreStrategic or Co-development Partner · 1 January 1998Long-term strategic partnership since 1998 supplying precision throttle valve shafts, SRV shafts, pistons, sleeves, VCT inner plates, and flux cores. Partnership expanded globally across BorgWarner's facilities in USA, Germany, Japan, China, Mexico.
• HKMC (Hyundai Kia Motor Corporation)coreStrategic or Co-development Partner · 1 January 1986Long-standing partnership since 1986 supplying water pumps, oil pump shafts, pistons, and flux cores for Hyundai and Kia vehicles. Awarded SQ Mark in 2017.

Scale indicators8 records

Recent moves8 records

Expansion highlights5 records

Direct peers

• Musashi Seimitsu Industry Co., Ltd. Japanese precision manufacturer of engine and transmission components including balancer shafts, camshafts, and CVT components. Directly comparable to DOSCO as a Tier-2 supplier producing high-precision machined metal parts for global automotive Tier-1s and OEMs.
• Riken Corporation: Japanese manufacturer of piston rings, pistons, cylinder liners, and sintered parts for engines and transmissions. Closely comparable product mix to DOSCO's piston and sleeve portfolio for automotive applications.
• TPR Co., Ltd. Japanese maker of piston rings, cylinder liners, and precision sintered/machined automotive components. Overlaps directly with DOSCO's piston and precision engine/transmission components for global Tier-1s.

Broad incumbents

• BorgWarner Inc. US-headquartered global Tier-1 supplier of transmission and powertrain components (including VCT systems where DOSCO supplies inner plates). Operates at significantly larger scale across a broader portfolio; also a long-standing core customer of DOSCO since 1998.
• Aisin Corporation: Japanese Tier-1 transmission specialist (Toyota Group affiliate) producing automatic transmissions and drivetrain components including the rod valves and shafts DOSCO supplies. Larger incumbent in adjacent/overlapping product space and a core customer.
• American Axle & Manufacturing (AAM): US Tier-1 driveline and drivetrain component manufacturer for GM, Ford, and Stellantis. Directly comparable product category (differential stub/pinion shafts that DOSCO supplies to AAM under a partnership started in 2015), but at much larger incumbent scale.
• Mahle GmbH: German global engine and powertrain components manufacturer (pistons, valves, bearings, thermal management). Broad incumbent with overlapping precision-machined product portfolio for automotive OEMs and Tier-1s.
• Dana Incorporated: US-headquartered global supplier of drivetrain, sealing, and thermal-management components for vehicle and engine OEMs. Overlaps with DOSCO's driveline/powertrain precision part portfolio at broader-incumbent scale.
• GKN Automotive: Global Tier-1 supplier of driveline technologies (constant-velocity joints, eDrive systems, AWD systems). Overlaps with DOSCO's powertrain/driveline shaft and component supply at much larger scale and broader portfolio.
• Hyundai Mobis: Korea's largest auto-parts Tier-1, serving Hyundai/Kia and other OEMs across modules, chassis, electronics, and powertrain. Broad incumbent in the same domestic Korean ecosystem where DOSCO operates; HKMC is a DOSCO customer.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights6 records

Customer concentration

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Dosco