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HSChapter 84
U.S. exports of diesel & semi-diesel compression-ignition engines for vehicle propulsion (HS 840820) totaled $573.7M in July 2026.
Importers of Diesel & Semi-Diesel Compression-Ignition Engines for Vehicle Propulsion paid $16.6M in duties in July 2026 — an effective duty rate of 13% on $127.3M in dutiable value, based on actual customs collections rather than the published tariff schedule. Diesel & Semi-Diesel Compression-Ignition Engines for Vehicle Propulsion imports of $174.1M in July 2026 ran 17% below the year-to-date monthly average of $209.7M.
Last updated: July 2026 dataCompression-ignition (diesel and semi-diesel) engines for propelling Chapter 87 vehicles — including agricultural tractors, road trucks, buses, and passenger cars — are classified under heading 840820, with five 10-digit lines distinguishing agricultural tractor engines by power output (8408201040, 8408201080), road-vehicle engines for buses/autos/trucks (8408202000), and residual vehicle categories (8408205000, 8408209000). Mexico and Germany lead US supply, reflecting both USMCA-integrated truck and tractor engine production and Germany's strength in commercial vehicle diesel technology. Engines from Mexico qualifying under USMCA rules of origin are eligible for preferential duty treatment.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
3.7K shipments/mo
Heading 840810 is specifically reserved for marine propulsion applications, while heading 840820 covers vehicle propulsion for Chapter 87 vehicles. If a diesel engine is a dual-purpose design marketed for both uses, classification follows the primary intended application as documented by the importer. CBP may request technical literature, sales invoices, or end-user declarations to confirm the application when it is not self-evident.
Lines 8408201040 and 8408201080 are dedicated to engines for agricultural tractors, split at the 37.3 kW power threshold, while 8408202000 covers engines for road tractors, buses, automobiles, and trucks. An engine physically identical in design but sold to a tractor manufacturer versus a truck manufacturer would classify differently based on the documented end-use. Importers should retain purchase orders or OEM supply agreements confirming the vehicle application.
Subheading 2 of 3 in heading 8408
Subheading 840820 · $174.1M of $481.8M
Supplier Network
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ImportsExports
Imports
$174.1MYoY · Pro
Exports
$573.7MYoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.
HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 8408202000 | Comp-Ign Eng Fr Prop Veh Ch87,Rd Tr,Bus,Auto,Truck | $150.1M | 9.67% | 72.23% | $14.5M |
| 8408201080 | Comp-Ign Eng Prop Fr Veh Ch87,Inst Ag Tr Ex 37.3kw | $11.2M | 9.40% | 89.96% | $1.1M |
| 8408209000 | Comp-Ig Int Comb Pst Eng Fr Prop of Veh Ch87, Neso | $8.6M | 9.60% | 78.45% | $823K |
| 8408201040 | Comp-Ign Eng Prop Fr Veh Ch87,Inst Ag Tr N/E37.3kw | $4.1M | 5.42% | 50.70% | $225K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 8408202000 | Comp-Ign Eng Fr Prop Veh Ch87,Rd Tr,Bus,Auto,Truck | $528.7M |
| 8408205000 | Diesel Eng for Vehicles of Chapter 87, NESOI | $45.0M |
Import lines come from the U.S. Harmonized Tariff Schedule and export lines from Schedule B. The two are numbered by different agencies, so the same 10-digit code can appear in both tables describing a different product.
Exports · July 2026
destination
Mexico and Canada together take 88% of it.
customs district
origin
entry
rate provision · imports
4.5% enters free of duty; the effective duty rate is 9.55%.