Spark-Ignition Reciprocating Piston Engines for Vehicles, Over 1,000 cc

The schedule draws a secondary breakpoint at 2,000 cc within the over-1,000 cc heading. Engines for road vehicles (buses, autos, trucks) below 2,000 cc are covered by lines 8407341400 (used) and 8407341800 (new), while those over 2,000 cc fall under 8407344400 (used) and 8407344800 (new). Agricultural and NESOI categories have parallel splits. Accurate displacement documentation from the engine manufacturer is essential for correct line selection.

Engines classified under heading 840734 are assessed under their own HTS lines and applicable trade-remedy orders independently of the vehicles they are destined for. Section 301 tariff applicability depends on the country of origin of the engine itself, not the vehicle's origin. Importers sourcing replacement engines from China should verify current Section 301 list coverage and any active exclusions before entry.