manufactured · input
Labor-intensive assembly of wire bundles with connectors; 1-4 km of wire per vehicle; ~80% of US-market vehicle harnesses assembled in Mexico by Aptiv, Lear, Yazaki, Sumitomo; 2022 Russia-Ukraine war disrupted Aptiv's Ukrainian plants (16,000 workers) overnight
9
Source countries
10
Companies
1
Goods affected
0
Claims on record
What depends on it
1 essential American goods rely on vehicle wiring harnesses somewhere upstream in their supply chain.
Where it comes from
Share of global supply, by country.
| Country | Share of supply |
|---|---|
| JPJapan | 28% |
| CNChina | 22% |
| DEGermany | 15% |
| MXMexico | 10% |
| INIndia | 8% |
| THThailand | 6% |
| UAUkraine | 5% |
| MAMorocco | 3% |
| PHPhilippines | 2% |
Who makes it
10 companies produce vehicle wiring harnesses.
Global automotive technology supplier; spun off from Delphi Automotive in 2017; world's second-largest wiring harness manufacturer; operates 14 manufacturing sites in Ukraine employing ~16,000 workers (disrupted by 2022 Russian invasion); also leads in ADAS and autonomous vehicle software.
Second-largest harness maker; 400+ subsidiaries in 30+ countries; local-for-local production strategy
Worlds largest automotive wiring harness manufacturer; 619 facilities in 46 countries; HQ Susono, Shizuoka Japan
Ireland-based Tier-1 automotive supplier; 131 facilities in 48 countries; Signal and Power Solutions segment
Global automotive seating and electrical systems supplier; world's third-largest wiring harness manufacturer; E-Systems segment produces harnesses, high-voltage connectors for EVs, and charging systems; major Mexican manufacturing base (20+ plants); seating segment is the largest in the world.
Japanese electrical conglomerate (TSE: 5802), co-inventor of VAD (Vapor Axial Deposition) preform process in 1977 with NTT and Fujikura. Primary optical fiber preform and drawing facility at Mie Works (Kameyama City, Mie Prefecture), which received IEEE Milestone recognition and switched to 100% renewable energy (announced October 2023). Launched the world's highest-fiber-count cable (13,824-fiber) from Mie Works No. 2 plant (February 2026). US operations via OFS Fitel (Norcross/Carrollton/Avon GA) — OFS and Hengtong formed a JV (Jiangsu OFS Hengtong Optical Technology, Suzhou, est. 2010) to produce VAD preforms in China. Furukawa is one of the world's most vertically integrated optical fiber companies: preform → fiber → cable → connectivity.
US-based Tier-1; 260 facilities in 40 countries; Connection Systems segment focuses on harnesses
German supplier; 51% owned by Chinese Luxshare Precision since 2024; 21 countries; major Ukraine exposure
Founded 1902; 50+ plants, 48,000 employees in 40 countries; significant Ukraine operations
Indian manufacturer; joint venture history with Sumitomo; low-cost hub for Asian supply chains
