HTS Code 842131: Intake air filters for internal combustion engines — 2026 US Tariff Rates
Quick Answer
HTS 842131 = Intake air filters for internal combustion engines
Duty rate: 2.5% · Unit: 84-digit · Column 1: 2.5%
Complete Classification Table
All 8-digit and 10-digit tariff codes under HTS subheading 842131. Use this table to find the correct statistical suffix and applicable duty rate for your product.
| HTS Code | Full Description | General Rate | Special Rate | Column 2 Rate |
|---|---|---|---|---|
8421.31.00.00 |
Intake air filters for internal combustion engines | 2.5% | Free (A,AU,B,BH,C,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 35% |
Chapter 84 Frequently Asked Questions
What is the Information Technology Agreement (ITA) and how does it affect Chapter 84?
The WTO Information Technology Agreement provides duty-free treatment for IT products including computers (8471), semiconductor manufacturing equipment (8486), and certain telecommunications apparatus. ITA benefits apply to all WTO members regardless of FTA status. Check whether your product is on the ITA product list.
How does Section 301 affect machinery imports from China?
Chinese-origin machinery faces Section 301 additional duties: List 1 (25%) covers industrial robots, valves, and machinery parts; List 3 (25%) covers electric motors, pumps, and many other machines. Check the specific HTS subheading against USTR's tariff lists. Chapter 99 exclusions may temporarily suspend the additional duty for certain products.
How are multi-function machines classified under Chapter 84?
Under GRI 3, multi-function machines are classified by their principal function. If no single function predominates, the machine is classified under the heading occurring last in numerical order. For example, a machine that both prints and copies would be classified under the heading for the predominant function, or the later heading if functions are equal.
Can parts for Chapter 84 machines qualify for duty-free ITA treatment?
Parts specifically for ITA-eligible products (computers, semiconductor equipment) may qualify for duty-free treatment if they are solely for use with ITA products and are imported with or for those products. Parts of general use do not qualify. The classification depends on the specific part and its intended application.
What is the USMCA regional value content rule for machinery?
Most Chapter 84 goods qualify for USMCA duty-free treatment if they meet the regional value content (RVC) requirement, typically 60-75% depending on the product. USMCA origin certification is self-issued — no government stamp required. The RVC can be calculated using the transaction value or net cost method.
HTS Chapter 84 Classification Guide: Nuclear Reactors, Boilers, Machinery & Mechanical Appliances
Chapter 84 is the largest HTS chapter by import value, covering everything from nuclear reactors and boilers to engines, turbines, pumps, compressors, HVAC equipment, computers, and mechanical appliances. Classification follows a functional hierarchy and is governed by Section XVI Notes, particularly Note 2 (parts classification) and Note 3 (functional units).
Common Misclassification Errors
- Misclassifying parts — Section XVI Note 2 states that parts suitable for use solely with a particular machine are classified with that machine, but this doesn't apply to interchangeable tools (Ch. 82) or parts of general use (Ch. 73)
- Classifying multi-function machines by the wrong function — the principal function determines classification; if no single function predominates, use the heading occurring last in numerical order (GRI 3(c))
- Confusing computer monitors (8471.60, duty-free under ITA) with video monitors (8528.52, subject to Section 301)
Duty Estimator
This page lists rates that may be ad valorem, specific, compound, or quota-based. The automatic estimator is intentionally disabled so a quantity-based rate is never mistaken for a percentage. Use the exact suffix, unit of quantity, origin, and current CBP guidance before calculating a shipment.
Quick Answer: HTS 842131 Duty Rates
HTS subheading 842131 (intake air filters for internal combustion engines) contains 1 sub-classification.
Suffix 8421.31.00.00: General rate 2.5%, Special (FTA): Free (A,AU,B,BH,C,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG).
Always verify with CBP — Section 301, Section 232, and ADD/CVD may apply.
Importing Under HTS 842131: What Importers Ask
Does this machinery qualify for duty-free treatment under the WTO ITA?
The Information Technology Agreement (ITA) eliminates duties on specific machinery, electronics, and semiconductor equipment. Check the ITA product list for your exact 6-digit code. ITA coverage requires specific statistical suffix matching — not all codes under an ITA-eligible heading qualify.
How do I determine whether a part is classified under Chapter 84/85 or the final product chapter?
Parts classification follows Section XVI Notes 2 and 3. A part specially designed for a specific machine is generally classified under the machine's heading, not as a generic part. For this HTS code, verify whether your item is a 'part' or a 'general use article' (which stays in Chapter 84/85).
What is the Section 301 tariff impact on machinery imports from China?
Machinery from China faces Section 301 tariffs of up to 25% (List 1 and List 3) or 7.5% (List 4A) depending on the specific HTS code. Check the current USTR exclusion list — exclusions are periodically renewed. Some machinery used in domestic manufacturing may qualify for exclusion based on availability.
What Importers Need to Know About HTS Chapter 84
This subheading falls under an HTS chapter covering industrial machinery including nuclear reactors, boilers, engines, turbines, pumps, compressors, HVAC equipment, computers, and mechanical appliances. Importers of these products should be aware of the following trade compliance considerations:
Chapter 84 is the largest HTS chapter by import value. ITA-eligible products (computers, semiconductor manufacturing equipment) qualify for duty-free treatment. Section 301 List 1 (25%) and List 3 (25%) apply to Chinese-origin machinery. Verify classification under Section XVI notes for parts and functional units.
For the specific subheading HTS 842131, we recommend you:
- Verify the correct 10-digit statistical suffix — even within a 6-digit subheading, duty rates can differ significantly between suffixes
- Check FTA eligibility — if your product qualifies for preferential treatment under USMCA, KORUS, or another FTA, you may reduce or eliminate duties by providing the required origin certification
- Monitor for trade remedy changes — Section 301, Section 232, and anti-dumping duties are updated periodically. A rate that was correct last quarter may have changed
- Consult CBP resources — for binding classification rulings, CBP's National Commodity Specialist Division provides written determinations
Duty Calculation Tips for HTS 842131
ITA-eligible products (computers, semiconductor manufacturing equipment) qualify for duty-free treatment globally. Section 301 List 1 (25%) and List 3 (25%) apply to Chinese-origin machinery. Verify whether your product has a Chapter 99 exclusion from Section 301 — these exclusions are temporary and lapse periodically. USMCA provides duty-free treatment for most Chapter 84 goods meeting RVC rules.
At a Glance
- The General duty rate for HTS 842131 is 2.5% · 1 statistical suffix · 0 duty-free.
- 1 sub-classification offer Special (FTA) rate preferences — check the Special column for USMCA, KORUS, and other FTA eligibility.
- This code falls under a chapter covering industrial machinery including nuclear reactors, boilers, engines, turbines, pumps, compressors, HVAC equipment, computers, and mechanical appliances.
Official Sources
PoliteDraft recommends verifying duty rates directly with official government sources before filing import documentation.
Independent editors organize official USITC HTS data and explain how to check the exact suffix, unit, origin, and trade remedies. This site is a research reference, not a customs broker, attorney, or classification opinion.
Related HTS Codes in This Section
Related Chapters
HTS Chapter 84 is frequently cross-referenced with the following chapters in supply chain and trade compliance workflows.
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Browse All HTS Codes in This Section
See the complete list of HTS subheadings under the same section as 842131.
View Section Overview →<strong>Editorial note:</strong> The first listed General rate for HTS 842131 (Intake air filters for internal combustion engines) is 2.5%. Rates can differ by suffix, origin, and trade remedy; verify the exact line in the current USITC schedule and with CBP or a licensed customs broker.