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HSChapter 84
U.S. imports of spark-ignition reciprocating piston engines over 1,000 cc for vehicle propulsion (HS 840734) totaled $884.9M in July 2026, traded with 28 countries.
Importers of Spark-Ignition Reciprocating Piston Engines Over 1,000 cc for Vehicle Propulsion paid $37.7M in duties in July 2026 — an effective duty rate of 9.7% on $389.2M in dutiable value, based on actual customs collections rather than the published tariff schedule.
Last updated: July 2026 dataSpark-ignition reciprocating piston engines exceeding 1,000 cc cylinder displacement for road vehicles are a high-value automotive powertrain commodity with a deeply subdivided US tariff schedule distinguishing engine size (under vs. over 2,000 cc), condition (new vs. used), and vehicle type (passenger cars, buses, trucks, agricultural tractors). Mexico and Canada dominate supply under USMCA, which provides preferential tariff treatment for qualifying engines meeting rules-of-origin requirements. Austria and South Korea are also significant sources, reflecting the presence of major engine manufacturing facilities for European and Asian automakers. Classification hinges on precise cylinder capacity measurement and whether the engine is destined for a Chapter 87 vehicle, making technical documentation critical at entry.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
10.5K shipments/mo
The US tariff schedule under 840734 explicitly separates new and used engines for road vehicles — for example, 8407341400 covers used engines under 2,000 cc for buses, autos, and trucks, while 8407341800 covers new engines in the same size range. Importers must accurately declare condition, as misclassification between new and used lines can result in duty underpayment and potential penalties.
Customs will expect manufacturer technical specifications or an engine data plate confirming displacement in cubic centimeters. For used engines, an independent inspection report or OEM documentation may be required. Accurate displacement figures are essential because the tariff lines bifurcate at 2,000 cc, and the applicable duty rate and any trade-remedy exposure can differ between the two size bands.
Subheading 1 of 8 in heading 8407
Subheading 840734 · $884.9M of $1.1B
Supplier Network
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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 |
|---|---|---|---|---|---|
| 8407344800 | Sp-Ig Rec Pst Eng, Rd Tr,Bus,Auto,Gt 2000cc,New | $771.4M | 1.21% | 22.59% | $9.3M |
| 8407341800 | Sp-Ig Rec Pst Eng,Rd Tr,Bus,Auto,Lt 2000cc,New | $95.0M | 28.44% | 217.79% | $27.0M |
| 8407344400 | Sp-Ig Rec Pst Eng,Rd Tr,Bus,Auto,Gt 2000cc,Used | $12.5M | 7.22% | 36.58% | $907K |
| 8407341400 | Sp-Ig Rec Pst Eng,Bus,Auto,Trks,Lt 2000cc,Used | $2.9M | 12.18% | 85.45% | $356K |
| 8407342500 | Sp-Ig Rec Pst Eng,Fr Prp Veh Ch87,NESOI,Lt 2,000cc | $2.0M | 3.36% | 32.80% | $68K |
| 8407345500 | Sp-Ig Rec Pst Eng,Prop Veh Ch87,NESOI,Gt 2,000cc | $886K | 6.12% | 21.50% | $54K |
| 8407340590 | Sp-Ig Rec Pst Eng Exc Air Agr Lt 2000cc Gt 37.3kw | $64K | 21.77% | 100.00% | $14K |
| 8407340530 | Sp-Ig Rec Pst Eng for Ag Trac Lt 2000cc Lt 37.3kw | $2K | 62.48% | 100.00% | $1K |
| 8407343590 | Sp-Ig Rec Pst Eng Exc Air Agr Gt 2000cc Gt 37.3kw | $0 | -- | -- | -- |
| 8407343530 | Sp-Ig Rec Pst Eng Fr Agri Trac Gt 2000cc Lt 37.3kw | $0 | -- | -- | -- |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 8407342090 | Sp-Ig Eng F Rd Tr, Bus, Auto, Truck, Ov 2000 Cc | $447.6M |
| 8407342030 | Spark-Ig Eng F Rd Tr,Bus,Auto,Truck,(1000-2000 Cc) | $115.1M |
| 8407345000 | Sp-Ig Rec Piston Eng, Ov 1000 Cc, NESOI | $65.3M |
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.
ImportsExports
Imports
$884.9MYoY · Pro
Exports
$628.0MYoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.
Imports · July 2026
origin
Canada and Mexico together supply 73% of it.
customs district
destination
entry
rate provision · imports
68.6% enters free of duty; the effective duty rate is 4.26%.