Heading 8408

Compression-ignition internal combustion piston engines (diesel or semi-diesel engines)

17 declarable lines

Heading 8408 covers compression-ignition internal combustion piston engines, meaning diesel or semi-diesel engines. It splits by use: marine propulsion engines in 8408.10, engines for propulsion of chapter 87 vehicles in 8408.20, and other engines in 8408.90, with power thresholds inside those groups.

Products in this heading

Marine diesel propulsion engines for boats
Diesel engines for agricultural tractors
Diesel engines for trucks and buses
Diesel engines for passenger cars
Diesel engines for agricultural or horticultural machinery
Stationary diesel engines for industrial equipment
Diesel engines for construction machinery

How to choose the right subheading

Confirm the engine is compression-ignition, meaning diesel or semi-diesel, not spark-ignition.
Decide whether the engine is for marine propulsion, for propulsion of a chapter 87 vehicle, or for other use.
For chapter 87 vehicle engines, identify whether the engine is for an agricultural tractor or for vehicles of 8701.21 through 8701.29 or headings 8702, 8703 or 8704.
For other engines, check whether the engine is for agricultural or horticultural machinery or equipment.
Use the engine power output in kW to select the correct break within the subheading.

Often confused with

Spark-ignition gasoline engines
Gasoline engines are spark-ignition, not compression-ignition.
Heading 8407
Parts for diesel engines
Parts are classified in heading 8409, not with complete engines.
Heading 8409
Gas turbines
Gas turbines use a different working cycle and are not piston diesel engines.
Heading 8411
Electric motors
Electric motors are not internal combustion engines.
Heading 8412

Frequently asked questions

What is the HTS code for a marine diesel engine?

Marine diesel propulsion engines are classified in 8408.10. For example, 8408.10.00.05 covers engines not exceeding 111.9 kW and has a 2.5% general (MFN) rate.

What is the duty on a diesel engine for an agricultural tractor?

Engines to be installed in tractors suitable for agricultural use are free: 8408.20.10.40 for not exceeding 37.3 kW and 8408.20.10.80 for exceeding 37.3 kW, both at Free general (MFN).

How do I classify a diesel engine over 746 kW for other use?

For other engines, use 8408.90.90.40 for exceeding 746 kW but not exceeding 1,119 kW and 8408.90.90.50 for exceeding 1,119 kW, both at Free general (MFN).

Guide written from the official schedule text. Rates quoted are general (MFN) rates; check the line page for trade agreement rates and the classification of your exact product.