Largest wire harness manufacturers in the world (2026)

The global wire harness market is dominated by a handful of automotive-focused giants, most with dozens of plants across low-cost manufacturing regions. This list ranks the largest by approximate scale and revenue; figures move year to year, so treat the order as indicative.

• Yazaki (Japan) — the world's largest automotive wire harness maker, with a vast global plant footprint.
• Sumitomo (Japan) — Sumitomo Wiring Systems is a close #2 in automotive harnesses.
• Aptiv (Ireland/US) — a leader in vehicle electrical architecture and high-voltage EV harnesses.
• Motherson (India) — Samvardhana Motherson, a major global harness supplier (and owner of PKC).
• Lear (US) — seating and e-systems, including automotive wiring.
• LEONI (Germany) — a leading European wire and harness manufacturer.
• Furukawa Electric (Japan) — wire, cable and automotive harness systems.
• Kromberg & Schubert (Germany) — a large privately held automotive harness maker.
• Nexans Autoelectric — automotive wiring systems.
• Coficab (Tunisia) — a major automotive cable supplier to the harness industry.

Beyond the giants, thousands of specialist and regional manufacturers serve aerospace, medical, industrial and low-volume work. Browse the full directory to compare 500+ manufacturers by country, capability and certification.