HS code for engine air filters

HS code

8421.31

US HTS code

8421.31.00

US general duty

2.5%

Source: USITC Harmonized Tariff Schedule, Revision 21 (2026), effective 10/09/2026 · checked 2026-10-28

Intake air filters for internal combustion engines are 8421.31.

US tariff lines under 8421.31

US HTS code	Description	General duty
8421.31.00	Filtering or purifying machinery and apparatus for gases › Intake air filters for internal combustion engines	2.5%

Import duty on engine air filters by country

Import into the US

2.5%

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Import into the UK

See commodity codes ›

Import into the EU

1.7%

See CN codes ›

Extra duties may apply

The general rate applies to most countries. Imports from some countries also pay additional duties under Chapter 99 of the HTS, such as Section 301 tariffs on many Chinese goods. Check the current measures for your country of origin before you order.

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Frequently asked questions

Q1What is the HS code for engine air filters?

The international HS code for engine air filters is 8421.31. Intake air filters for internal combustion engines are 8421.31.

Q2What is the US import duty on engine air filters?

Under HTS 8421.31.00, the US general duty rate is 2.5%. Goods from some countries pay additional duties on top of this rate.

Q3What is the 10-digit HTS code for engine air filters?

8421.31.00.00.

Q4Is the HS code the same in every country?

The first 6 digits (8421.31) are the same in every country that uses the Harmonized System. The digits after that, and the duty rates, are set by each country.

Find another HS code

New to customs terms? Read what an HS code is and our guide on how to calculate landed cost.

Classification guidance only, not a binding ruling or customs advice. The right code depends on your product’s exact material, function and construction. For certainty, request a binding ruling from U.S. Customs and Border Protection or ask a licensed customs broker.