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HSChapter 84
U.S. imports of intake air filters for internal combustion engines (HS 842131) totaled $47.9M in April 2026, traded with 55 countries.
Importers of Intake Air Filters for Internal Combustion Engines paid $4.3M in duties in April 2026 — an effective duty rate of 16% on $27.4M in dutiable value, based on actual customs collections rather than the published tariff schedule.
Last updated: April 2026 dataIntake air filters — which remove particulates from combustion air before it enters the engine — are a critical wear-replacement component across automotive, trucking, agricultural, and construction equipment sectors. Mexico is the primary US import source, underpinned by integrated North American automotive manufacturing, while China is a significant secondary supplier subject to Section 301 tariff exposure. Unlike oil or fuel filters, intake air filters are classified separately under 8421.31, so mixed shipments containing both air and fuel filters require line-item separation on the commercial invoice.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
Intake air filters (8421.31) are specifically designed to clean combustion air entering an internal combustion engine. Cabin air filters, which purify passenger-compartment air, are not engine components and classify differently — typically as parts of motor vehicles or HVAC equipment. The functional destination of the filtered air is the controlling distinction.
No. Intake air filters (8421.31) and oil or fuel filters (8421.23) are separate HTS subheadings and must be declared on separate tariff lines. Combining them on a single line risks misclassification and potential penalties; the commercial invoice should itemize each filter type with its applicable HTS code.
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Monthly import values over time
HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 8421310000 | INTAKE AIR FILTERS FOR INTERNAL COMBUSTION ENGINES | $47.9M | 15.66% | $4.3M |
INTAKE AIR FILTERS FOR INTERNAL COMBUSTION ENGINES
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 8421310000 | INTAKE AIR FILTERS FOR INTERNAL COMBUSTION ENGINES | $58.7M |
INTAKE AIR FILTERS FOR INTERNAL COMBUSTION ENGINES
2.0M no
DIGITAL PROCESSING UNITS, N.E.S.O.I.
HS 847150
PARTS & ACCESSORIES FOR ADP MACHINES & UNITS
HS 847330
PORT DIGTL AUTOMATIC DATA PROCESS MACH NOT > 10 KG
HS 847130
AUTOMATIC DATA PROCESSING STORAGE UNITS, N.E.S.O.I
HS 847170
AUTOMATIC DATA PROCESSING UNITS, N.E.S.O.I.
HS 847180
TURBOJET AND TURBOPROLLER PARTS
HS 841191
| State | Imports | Exports | Balance |
|---|---|---|---|
| Unidentified | -- | $14.2M | +$14.2M |
| Indiana | $4.8M | $9.1M | +$4.3M |
| Texas | $4.9M | $3.7M | -$1.2M |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| LAREDO, TX | $17.5M | $7.6M | -$9.9M |
| LOW VALUE | -- | $14.2M | +$14.2M |
| LONG BEACH, CA | $2.2M | $7.8M | +$5.6M |