Product classification
HS code for Spark ignition engine parts: 8409.91
Engines, parts, suitable for use solely or principally with spark-ignition internal combustion piston engines (for other than aircraft).
Classification of spark ignition engine parts under HS 8409.91
Parts suitable for use solely or principally with spark-ignition internal combustion piston engines are classified under HS code 8409.91. This classification follows the guidelines of Chapter 84, which covers nuclear reactors, boilers, machinery, and mechanical appliances. Heading 8409 is a specific "parts" heading for engines described in headings 8407 (spark-ignition) or 8408 (compression-ignition). Subheading 8409.91 is specifically for parts of spark-ignition engines, excluding those used in aircraft. Classification under this code requires that the part does not have a more specific heading elsewhere in the nomenclature. The "solely or principally" rule is critical; if a part is used across multiple types of machinery, its classification might change. However, specialized components like pistons, cylinder blocks, and cylinder heads for petrol engines are typically found here. This code excludes parts that are specifically mentioned in other chapters, such as electrical components (Chapter 85) or gaskets (Chapter 8484).
- Covers
- Pistons and piston rings
- Cylinder blocks and heads
- Connecting rods
- Carburetors
- Intake manifolds
- Valve covers
- Fuel injectors (for spark-ignition)
- Also under 8409.91
- Bosch spark plugs
- Mahle pistons
- Denso fuel injectors
- NGK ignition coils
- Fram oil filters
Codes often confused with 8409.91
Common mistake. Parts for diesel engines (compression-ignition) are often misclassified here but belong under HS code 8409.99. General vehicle parts that are not engine-specific, such as bumpers or body panels, are classified under 8708. Furthermore, electrical parts like spark plugs (8511.10) or ignition coils (8511.30) are classified in Chapter 85, even though they are essential engine components.
Top exporters and importers of HS 840991 (the code used for spark ignition engine parts), 2025
In 2025, the largest exporter of HS 840991 (the code used for spark ignition engine parts) in UN Comtrade data was China, with 18% of world exports; the largest importer in UN Comtrade data was the United States, with 21% of world imports. Countries that did not report 2025 data are estimated from partner records, which can understate them.
Figures cover everything classified under HS 840991, not only spark ignition engine parts.
Top exporters 2025 · share of world exports
- 1 China $6.1B 18% of world exports
- 2 Germany $5.2B 15% of world exports
- 3 Mexico $4.1B 12% of world exports
World total: $34.5B Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 United States $7.5B 21% of world imports
- 2 Mexico $3.0B 8.5% of world imports
- 3 Germany $2.9B 8.2% of world imports
World total: $35.0B 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 spark ignition engine parts
Brazil splits HS 8409.91 into 12 NCM codes. Pick the one that matches your product:
- 8409.91.11Connecting rods for spark-ignition engines
- 8409.91.12Spark-ignition engine blocks, heads, crankcases
- 8409.91.13Diaphragm carburettors, max 22.8 mm venturi, 280 g
- 8409.91.14Spark-ignition engine intake or exhaust valves
- 8409.91.15Spark-ignition engine intake/exhaust manifolds
- 8409.91.16Piston rings for spark-ignition engines
- 8409.91.17Valve guides for spark-ignition engines
- 8409.91.18Other carburettors
- 8409.91.20Pistons for spark-ignition engines
- 8409.91.30Cylinder liners for spark-ignition engines
- 8409.91.40Electronic injection for spark-ignition engines
- 8409.91.90Other parts for spark-ignition engines
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text on each NCM page is the official one.
Questions about spark ignition engine parts
What is the HS code for Spark ignition engine parts?
The HS code for Spark ignition engine parts is 840991 (Engines; parts, suitable for use solely or principally with spark-ignition internal combustion piston engines (for other than aircraft)). The HS code for parts used solely or principally with spark-ignition engines is 8409.91.
How do I classify Spark ignition engine parts for customs?
Spark ignition engine parts is classified under HS code 840991 — Engines; parts, suitable for use solely or principally with spark-ignition internal combustion piston engines (for other than aircraft). This is a 6-digit subheading level code.
Are engine valves classified under 8409.91?
No, intake and exhaust valves are generally classified under HS code 8481.80 as they are considered valves/taps/cocks, which have a more specific heading.
Which countries are the top exporters of spark ignition engine parts (HS 840991)?
In 2025, the top exporters of HS 840991 (the code used for spark ignition engine parts) in UN Comtrade data were China ($6.1B, 18% of world exports), Germany ($5.2B) and Mexico ($4.1B). World exports came to about $34.5B, 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 spark ignition engine parts (HS 840991)?
In 2025, the top importers of HS 840991 (the code used for spark ignition engine parts) in UN Comtrade data were the United States ($7.5B, 21% of world imports), Mexico ($3.0B) and Germany ($2.9B). World imports came to about $35.0B, 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.
Is the HS code for Spark ignition engine parts the same in all countries?
The base HS code 840991 for Spark ignition engine parts is internationally standardized for the first 6 digits across 200+ countries. Individual countries may add additional digits for national tariff lines and specific classifications.
What is the NCM code for spark ignition engine parts in Brazil?
Brazil splits HS 840991 into 12 NCM codes, so the right one for spark ignition engine parts depends on the product's details: 8409.91.11 (Connecting rods for spark-ignition engines), 8409.91.12 (Spark-ignition engine blocks, heads, crankcases), 8409.91.13 (Diaphragm carburettors, max 22.8 mm venturi, 280 g), 8409.91.14 (Spark-ignition engine intake or exhaust valves), 8409.91.15 (Spark-ignition engine intake/exhaust manifolds), 8409.91.16 (Piston rings for spark-ignition engines), and more.