HS code · 6-digit subheading
HS Code 8409.99 – Engines; parts for internal combustion piston engines (excluding spark-ignition)
HS code 8409.99 is the 6-digit subheading for engines, parts for internal combustion piston engines (excluding spark-ignition). It is used for diesel injectors, glow plugs, turbochargers, cylinder liners and camshafts.
What HS 8409.99 covers
This HS code covers parts for internal combustion piston engines, specifically excluding spark-ignition types, meaning it primarily focuses on diesel (compression-ignition) engine components. This segment is crucial for heavy machinery, commercial vehicles, marine vessels, and industrial power generation. International trade in these parts is characterized by the need for durability, precision engineering, and robust performance under demanding conditions. Major importers and exporters include manufacturers of heavy equipment, commercial vehicle producers, and specialized diesel engine component suppliers. Understanding the specific application (e.g., marine, construction, power generation) is vital, as parts often require specialized certifications and adherence to industry-specific standards for reliability and longevity.
- Covers
- Diesel injectors
- Glow plugs
- Turbochargers
- Cylinder liners
- Camshafts
- Fuel pumps
- Exhaust manifolds
- Piston rings
- Engine blocks
- Examples
- Cummins engine parts
- Caterpillar diesel components
- Bosch common rail injectors
- Yanmar marine engine parts
Codes often confused with 8409.99
Common mistake. Can be confused with 840991 (spark-ignition engine parts) or 8408 (complete diesel engines), but 840999 specifically covers parts for compression-ignition (diesel) engines, not the full engines.
Top exporters and importers of HS code 840999, 2025
In 2025, the largest exporter of HS code 840999 in UN Comtrade data was Germany, with 22% of world exports; the largest importer in UN Comtrade data was Germany, with 10% of world imports. Countries that did not report 2025 data are estimated from partner records, which can understate them.
Top exporters 2025 · share of world exports
- 1 Germany $8.7B 22% of world exports
- 2 China $4.0B 10.0% of world exports
- 3 Netherlands $2.6B 6.5% of world exports
World total: $40.0B Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 Germany $3.8B 10% of world imports
- 2 United States $3.8B 10% of world imports
- 3 United Kingdom $2.4B 6.3% of world imports
World total: $37.7B Reported figures on UN Comtrade ↗
How these figures are built
109 countries reported 2025 trade to UN Comtrade in HS 2022, and their own totals are used. Countries that did not report are estimated from what other countries recorded trading with them. Those estimates miss trade with other non-reporting countries, so they can be low, and a non-reporting country can rank higher than shown or be missing from the list. World totals add both and leave out trade between two non-reporting countries. Figures are in current US dollars; reported imports are mostly valued CIF and exports FOB, and exports include re-exports. The UN Comtrade links show the underlying records; they can also list a few reporters left out here (regional groups and older HS editions).
Source: UN Comtrade (United Nations Statistics Division), 2025 annual data.
Brazil NCM codes for 8409.99 17
Brazil splits HS 8409.99 into 17 NCM codes, Mercosur's 8-digit tariff lines.
- 8409.99.1 Cylinder blocks, crankcases, intake or exhaust valves, intake or exhaust manifolds and valve guidesBlocos de cilindros, cárteres, válvulas de admissão ou de escape, coletores de admissão ou escape e guias de válvulas Group
- 8409.99.12 Diesel engine cylinder blocks and crankcasesBlocos de cilindros e cárteres
- 8409.99.14 Diesel engine intake or exhaust valvesVálvulas de admissão ou de escape
- 8409.99.15 Diesel engine intake or exhaust manifoldsColetores de admissão ou de escape
- 8409.99.17 Diesel engine valve guidesGuias de válvulas
- 8409.99.2 Pistons or plungersPistões ou êmbolos Group
- 8409.99.21 Diesel engine pistons, 200 mm diameter or moreDe diâmetro igual ou superior a 200 mm
- 8409.99.29 Diesel engine pistons under 200 mmOutros
- 8409.99.30 Diesel engine cylinder linersCamisas de cilindro
- 8409.99.4 Connecting rodsBielas Group
- 8409.99.41 Diesel connecting rods, 30 kg or moreDe peso igual ou superior a 30 kg
- 8409.99.49 Diesel connecting rods under 30 kgOutras
- 8409.99.5 Cylinder headsCabeçotes Group
- 8409.99.51 Diesel cylinder heads, 200 mm diameter or moreDe diâmetro igual ou superior a 200 mm
- 8409.99.59 Diesel cylinder heads under 200 mmOutros
- 8409.99.6 Injector nozzles (including injector holders)Bicos injetores (incluindo os porta-injetores) Group
- 8409.99.61 Diesel injector nozzles, 20 mm diameter or moreDe diâmetro igual ou superior a 20 mm
- 8409.99.69 Diesel injector nozzles under 20 mmOutros
- 8409.99.7 Piston ringsAnéis de segmento Group
- 8409.99.71 Diesel piston rings, 200 mm diameter or moreDe diâmetro igual ou superior a 200 mm
- 8409.99.79 Diesel piston rings under 200 mmOutros
- 8409.99.9 OtherOutras Group
- 8409.99.91 Diesel liners welded to heads, dia. 200 mm or moreCamisas de cilindro soldadas a cabeçotes, de diâmetro igual ou superior a 200 mm
- 8409.99.99 Other diesel engine partsOutras
All Brazil NCM codes in heading 84.09 →
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text is official; the English is our translation.
Questions about HS 8409.99
What is HS code 840999?
HS code 840999 is a 6-digit subheading in the Harmonized System that covers: Engines; parts for internal combustion piston engines (excluding spark-ignition). This HS code covers parts for internal combustion piston engines, specifically excluding spark-ignition types, meaning it primarily focuses on diesel (compression-ignition) engine components. This segment is crucial for heavy machinery, commercial vehicles, marine vessels, and industrial power generation. International trade in these parts is characterized by the need for durability, precision engineering, and robust performance under demanding conditions. Major importers and exporters include manufacturers of heavy equipment, commercial vehicle producers, and specialized diesel engine component suppliers. Understanding the specific application (e.g., marine, construction, power generation) is vital, as parts often require specialized certifications and adherence to industry-specific standards for reliability and longevity.
What products fall under HS code 840999?
Diesel injectors, glow plugs, turbochargers, cylinder liners, camshafts, fuel pumps, exhaust manifolds, piston rings, engine blocks
What are common misclassifications for HS code 840999?
Can be confused with 840991 (spark-ignition engine parts) or 8408 (complete diesel engines), but 840999 specifically covers parts for compression-ignition (diesel) engines, not the full engines.
Which countries are the top exporters of goods under HS code 840999?
In 2025, the top exporters of HS code 840999 in UN Comtrade data were Germany ($8.7B, 22% of world exports), China ($4.0B) and the Netherlands ($2.6B). World exports came to about $40.0B, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.
Which countries are the top importers of goods under HS code 840999?
In 2025, the top importers of HS code 840999 in UN Comtrade data were Germany ($3.8B, 10% of world imports), the United States ($3.8B) and the United Kingdom ($2.4B). World imports came to about $37.7B, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.
How is HS code 840999 structured?
HS code 840999 is a 6-digit subheading under the Harmonized System. The first 2 digits (84) identify the chapter, digits 3-4 (09) identify the heading, and digits 5-6 (99) specify the subheading. This code is standardized globally by the World Customs Organization.
What is the Brazil NCM code for HS code 840999?
Brazil splits HS code 840999 into 17 NCM codes: 8409.99.12 (Diesel engine cylinder blocks and crankcases), 8409.99.14 (Diesel engine intake or exhaust valves), 8409.99.15 (Diesel engine intake or exhaust manifolds), 8409.99.17 (Diesel engine valve guides), 8409.99.21 (Diesel engine pistons, 200 mm diameter or more), 8409.99.29 (Diesel engine pistons under 200 mm), 8409.99.30 (Diesel engine cylinder liners), 8409.99.41 (Diesel connecting rods, 30 kg or more), and more listed on this page. The first 6 digits of each match the HS code.