U.S. exports of Compression-Ignition (Diesel and Semi-Diesel) Engines for Road Vehicles (SITC 71323) totaled $575.8M in August 2026.
Importers of Compression-Ignition (Diesel and Semi-Diesel) Engines for Road Vehicles paid $8.4M in duties in August 2026, an average duty rate of 8.19% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule. Compression-Ignition (Diesel and Semi-Diesel) Engines for Road Vehicles imports of $126.0M in August 2026 ran 37% below the year-to-date monthly average of $199.3M.
Last updated: August 2026 dataDiesel and semi-diesel compression-ignition engines destined for road vehicles — including trucks, buses, and heavy equipment — are a foundational input for the commercial transportation sector. Unlike spark-ignition counterparts, these engines are classified by their ignition method and end-use application (road vehicles), making both technical specification and intended use relevant to correct tariff placement. Emissions certification documentation from the EPA or CARB is frequently required at entry for engines intended for on-road use in the United States.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
2.0K import shipments a month
Yes. Diesel engines for on-road use must comply with EPA emissions standards under the Clean Air Act, and importers are required to file an EPA Declaration Form (3520-1) at entry. Engines that do not meet applicable standards may be refused admission or require modification before release. CARB standards apply additionally for engines destined for California use.
Classification hinges on the engine's design and intended application. Technical documentation such as the manufacturer's application guide, emissions certification (on-road vs. non-road), and any vehicle-specific mounting or control features are the primary evidence. An engine certified and marketed for on-road trucks falls here, while an otherwise similar engine designed for agricultural or marine use would be classified under a different SITC heading.
Basic heading 23 of 642 in section 7
Basic heading 71323 · $575.8M of $76.2B
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Exports · August 2026
destination
Mexico and Canada together take 90% of it.
customs district
Census does not publish district detail for this classification system.
origin
Census does not publish state detail for this classification system.
entry
Census does not publish port detail for this classification system.
ImportsExports
Imports
$126.0MYoY · free account
Exports
$575.8MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $2.5B of Compression-Ignition (Diesel and Semi-Diesel) Engines for Road Vehicles.
Through August 2026 · exports 10 of 12 months reported. Source: U.S. Census Bureau.