Harmonized Tariff Schedule of the United States · HTS code · HS 8409.99

8409.99.91

8409.99.91: Diesel engine parts: To be installed in vehicles of subheading 8701.21, 8701.22, 8701.23, 8701.24 or 8701.29, or heading 8702, 8703 or 8704

Diesel engine parts

Not declarable on its own: use one of its 2 subdivisions Data: Harmonized Tariff Schedule of the United States · checked on 24 October 2026

  1. 8409 Parts suitable for use solely or principally with the engines of heading 8407 or 8408:
  2. Other:
  3. 8409.99 Other:
  4. Other:
  5. 8409.99.91 To be installed in vehicles of subheading 8701.21, 8701.22, 8701.23, 8701.24 or 8701.29, or heading 8702, 8703 or 8704

What you pay

Importing into USA

Customs duty 2.5% standard rate depends on the country of origin
Additional duties and charges 1 additional measure
VAT no federal VAT; a Merchandise Processing Fee of 0.3464 % is charged on formal entries
Duty calculatorCalculate duty and taxes →

US additional duties of HTS chapter 99 in force on 22 October 2026 are included (Section 301, 232, 338 and 201). IEEPA duties are no longer collected after the Supreme Court ruling of February 2026. Conditional exemptions (US content, end use, metal share) are not computed: check the provision.

Additional duties and import rules

Charges on top of the customs duty, and rules the goods must meet at the border.

Additional duties and charges 1

  • Additional dutySection 301 — China — technology transfer, IP and innovation (2018 actions and 2024 four-year review) 25%
    Applies to goods from
    China
    In force
    from 24 September 2018
    Legal act
    HTSUS 9903.88.03

Preferential rates by country

Agreement or schemeCountriesRate
General (MFN)—2.5%
US–Australia FTA AUAustraliaFree
US–Bahrain FTA BHBahrainFree
US–Chile FTA CLChileFree
US–Colombia TPA COColombiaFree
US–Israel FTA ILIsraelFree
US–Jordan FTA JOJordanFree
US–Korea FTA KRSouth KoreaFree
US–Morocco FTA MAMoroccoFree
US–Oman FTA OMOmanFree
CAFTA-DR PCosta Rica, Dominican Republic, El Salvador, Guatemala, Honduras, NicaraguaFree
US–Panama TPA PAPanamaFree
US–Peru TPA PEPeruFree
USMCA SCanada, MexicoFree
US–Singapore FTA SGSingaporeFree
Column 2Cuba, North Korea, Russia, Belarus35%

Special: reduced rates under trade agreements and preference programmes; the letters in brackets name the programmes (for example AU = Australia FTA, KR = Korea FTA).

Subdivisions

  1. 8409.99.91 To be installed in vehicles of subheading 8701.21, 8701.22, 8701.23, 8701.24 or 8701.29, or heading 8702, 8703 or 8704 2.5%
  2. 8409.99.91.10 Connecting rods No., kg
  3. 8409.99.91.90 Other kg, No.

Same subheading in other tariffs

8409.99 Parts suitable for use solely or principally with: other, other

UK 2% Third-country duty 6 tariff lines EU 2.7% Third-country duty 1 tariff line Türkiye 2.7% Third-country duty 9 tariff lines Canada Free Third-country duty 3 tariff lines Mexico Free – 25% Third-country duty 13 tariff lines · average 15.8% Brazil Free – 16% Third-country duty 17 tariff lines · average 10.4% Argentina Free – 16% Third-country duty 21 tariff lines · average 11.4% Peru Free Third-country duty 12 tariff lines New Zealand Free – 5% Third-country duty 22 tariff lines · average 3.6% Japan Free Third-country duty 2 tariff lines Taiwan 5% Third-country duty 6 tariff lines GCC 5% Third-country duty 5 tariff lines Switzerland Free Third-country duty 1 tariff line Norway Free Third-country duty 2 tariff lines North Macedonia 2.7% Third-country duty 1 tariff line Nigeria 10% Third-country duty 1 tariff line

USA lines: 8409.99

Binding rulings for similar goods

Decisions of U.S. Customs and Border Protection (CROSS) and HMRC (Advance Tariff Rulings) on goods classified here. A ruling binds only its holder, but shows how the authorities classify similar goods. The descriptions are the authorities’ own, in English.

  • N362265 U.S. CBP 13 July 2026 · 8409.99.91.90

    The tariff classification of an intake manifold gasket from South Korea

  • N354570 U.S. CBP 28 October 2025 · 8409.99.91.90

    The tariff classification of gaskets assemblies for heavy-duty diesel trucks from Mexico

  • N316752 U.S. CBP 22 January 2021 · 8409.99.91.10

    The tariff classification of forged connecting rods from Mexico

  • N316797 U.S. CBP 12 January 2021 · 8409.99.91.90

    The tariff classification of exhaust manifold end pieces from the United Kingdom

  • N312525 U.S. CBP 8 July 2020 · 8409.99.91.90

    The tariff classification of a roller blank from Germany.

  • N301315 U.S. CBP 15 November 2018 · 8409.99.91.90

    The tariff classification of a thermostat housing cover and exhaust outlet connection from China.

  • N300159 U.S. CBP 18 September 2018 · 8409.99.91.90

    The tariff classification of a brass sleeve from China.

  • N298835 U.S. CBP 6 August 2018 · 8409.99.91.90

    The tariff classification of engine intake axles from Italy.

Legal notes

Additional notes

1. For the purposes of subheadings 840710 and 840910, the expression ‘aircraft engines’ shall apply only to engines designed for fitting with an airscrew or rotor.

2. Subheading 84717030 shall also apply to CD-ROM drives, being storage units for automatic data-processing machines, which consist of drive units designed for retrieving the signals from CD-ROMs, audio CDs and photo CDs and equipped with a jack for earphones, a volume-control button or a start/stop button.

Chapter notes: Chapter 84 →

In the Harmonized Tariff Schedule of the United States, 8409.99.91 is one of 4 lines under subheading 8409.99, parts suitable for use solely or principally with: other, other.

The general duty is 2.5%.

2 statistical sub-lines below it are used in the declaration.

For the same subheading, the UK duty is 2%, the EU duty is 2.7%, the Türkiye duty is 2.7%, the Canada duty is free, the Mexico duty is 0%–25%, the Brazil duty is 0%–16%, the Argentina duty is 0%–16%, the Peru duty is free, the New Zealand duty is 0%–5%, the Japan duty is free, the Taiwan duty is 5%, the GCC duty is 5%, the Switzerland duty is free, the Norway duty is free, the North Macedonia duty is 2.7% and the Nigeria duty is 10%.

The United States imported goods of subheading 8409.99 worth US$5bn in 2024; the largest supplier was Germany.

Questions and answers

What is the USA import duty for HTS code 8409.99.91?

The general duty in the Harmonized Tariff Schedule of the United States is 2.5%. Preferential rates for goods from agreement countries, anti-dumping duties and VAT are not included.

Is there a lower rate for 8409.99.91 under US trade agreements?

Yes. The Special column reads “Free (A*,AU,B, BH, CL, CO,D,E, IL, JO, KR, MA, OM,P, PA, PE,S, SG)”: the letters in brackets name the agreements and programmes that grant it.

Where does the United States import these goods from?

For subheading 8409.99 as a whole, the largest supplier in 2024 was Germany (US$1bn), followed by Mexico.

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