U.S. imports of Ignition Wiring Sets & Vehicle Wiring Harnesses (SITC 77313) totaled $1.5B in August 2026, imported from 89 countries.
Importers of Ignition Wiring Sets & Vehicle Wiring Harnesses paid $68.9M in duties in August 2026, an average duty rate of 4.50% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule.
Last updated: August 2026 dataWiring harnesses and ignition sets engineered for automobiles, aircraft, and marine vessels are purpose-built assemblies that integrate multiple conductors, connectors, and protective sleeving into a single routed unit. The automotive sector dominates trade volume in this heading, with harness manufacturing concentrated in low-cost labor markets that supply global OEM assembly plants. Mexico is a dominant supplier to the US market given its proximity and deep integration into North American automotive supply chains under USMCA, making cross-border logistics and rules-of-origin compliance central concerns for automotive procurement teams.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
121.1K import shipments a month
Under USMCA, automotive wiring harnesses must meet specific regional value content and tariff classification change requirements to qualify for preferential duty treatment. The rules are detailed and product-specific; importers should work with a licensed customs broker or trade attorney to confirm that their harnesses meet the applicable USMCA automotive rules before claiming preference.
Yes—the heading explicitly covers wiring sets of a kind used in vehicles, aircraft, or ships. Automotive harnesses are the dominant trade flow, but aircraft wiring looms and marine ignition sets are also classified here, provided they are purpose-designed for those applications rather than general electrical wiring.
Basic heading 16 of 642 in section 7
Basic heading 77313 · $1.5B of $172.0B
Imports · August 2026
origin
Mexico and Philippines together supply 75% of it. Vietnam pays 20.0% duty; Mexico 0.8%.
customs district
Census does not publish district detail for this classification system.
destination
Census does not publish state detail for this classification system.
entry
Census does not publish port detail for this classification system.
ImportsExports
Imports
$1.5BYoY · free account
Exports
$287.9MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $16.5B of Ignition Wiring Sets & Vehicle Wiring Harnesses.
Through August 2026 · exports 10 of 12 months reported. Source: U.S. Census Bureau.
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