Product classification
HS code for DPF filter: 8421.32
Machinery, catalytic converters or particulate filters, whether or not combined, for purifying or filtering exhaust gases from internal combustion engines.
Classification of DPF filter under HS 8421.32
Diesel Particulate Filters (DPF) are classified under HS code 842132. This classification falls within Chapter 84, which encompasses nuclear reactors, boilers, machinery, and mechanical appliances. Heading 8421 specifically covers centrifuges and filtering or purifying machinery and apparatus for liquids or gases. The sub-heading 842132 is a specific provision for catalytic converters or particulate filters, whether or not combined, designed for purifying or filtering exhaust gases from internal combustion engines. The classification is determined by the primary function of the device, which is the mechanical and chemical removal of soot and particulate matter from engine emissions. As an essential component for environmental compliance in modern diesel engines, the DPF is recognized as a specialized filtering apparatus rather than a general engine part.
- Covers
- Ceramic wall-flow particulate filters
- Silicon carbide DPF units
- Sintered metal fiber filters for exhaust
- Combined DPF and Catalytic Converter units
- Retrofit diesel soot filters
- Also under 8421.32
- MagnaFlow catalytic converters
- Walker exhaust systems (with integrated converters)
- Tenneco DPFs
- Johnson Matthey catalysts
Codes often confused with 8421.32
Common mistake. A common misclassification for DPF filters is HS code 842139, which is the residual category for other gas filtering or purifying machinery. However, because 842132 specifically mentions particulate filters for exhaust gases, it must be used according to the principle of specificity. Another frequent error is classifying these filters under 870892, which covers parts and accessories of motor vehicles, specifically silencers (mufflers) and exhaust pipes. Under the General Rules of Interpretation (GRI 1), a product that is specifically described in a heading of Chapter 84 (filtering machinery) is excluded from the general parts headings of Chapter 87.
Top exporters and importers of HS 842132 (the code used for DPF filter), 2025
In 2025, the largest exporter of HS 842132 (the code used for DPF filter) in UN Comtrade data was Germany, with 25% of world exports; the largest importer in UN Comtrade data was the United States, with 27% 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 842132, not only DPF filter.
Top exporters 2025 · share of world exports
- 1 Germany $2.6B 25% of world exports
- 2 Mexico $2.1B 20% of world exports
- 3 United States $1.1B 11% of world exports
World total: $10.4B Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 United States $3.0B 27% of world imports
- 2 Germany $2.4B 21% of world imports
- 3 Mexico $634M 5.6% of world imports
World total: $11.4B 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 code for DPF filter
Brazil classifies DPF filter under NCM 8421.32.00: HS 8421.32 with 00 added.
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text on each NCM page is the official one.
Questions about DPF filter
What is the HS code for DPF filter?
The HS code for DPF filter is 842132 (Machinery; catalytic converters or particulate filters, whether or not combined, for purifying or filtering exhaust gases from internal combustion engines). The HS code for a Diesel Particulate Filter is 842132.
How do I classify DPF filter for customs?
DPF filter is classified under HS code 842132 — Machinery; catalytic converters or particulate filters, whether or not combined, for purifying or filtering exhaust gases from internal combustion engines. This is a 6-digit subheading level code.
Does this code apply to filters for stationary generators?
Yes, HS code 842132 applies to particulate filters for exhaust gases from internal combustion engines, regardless of whether the engine is in a vehicle or a stationary power unit.
Which countries are the top exporters of DPF filter (HS 842132)?
In 2025, the top exporters of HS 842132 (the code used for DPF filter) in UN Comtrade data were Germany ($2.6B, 25% of world exports), Mexico ($2.1B) and the United States ($1.1B). World exports came to about $10.4B, 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 DPF filter (HS 842132)?
In 2025, the top importers of HS 842132 (the code used for DPF filter) in UN Comtrade data were the United States ($3.0B, 27% of world imports), Germany ($2.4B) and Mexico ($634M). World imports came to about $11.4B, 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 DPF filter the same in all countries?
The base HS code 842132 for DPF filter 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 DPF filter in Brazil?
In Brazil, DPF filter (HS 842132) is classified under NCM 8421.32.00.