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

8409.99.92

8409.99.92: For marine propulsion engines

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. 8409.99.92 For marine propulsion engines

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. 8409.99.92 For marine propulsion engines 2.5%
  2. 8409.99.92.10 Connecting rods No., kg
  3. 8409.99.92.90 Other kg

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

  • N355942 U.S. CBP 3 December 2025 · 8409.99.10.40

    The tariff classification of cast-iron heavy-duty cylinder heads from Mexico

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

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

  • H317007 U.S. CBP 13 February 2023 · 8409.99.10

    Revocation of NY N312073; Tariff Classification of Cast-Iron Cylinder Heads and Block Castings

  • 600015242 HMRC 15 April 2026 – 14 April 2029 · 8409 99 00 90

    The Thermoline designed solely or principally for automotive diesel engines. It is designed to prevent diesel fuel waxing or jellification. It achieves this through an integrated 24 V electrical heater trace, forming a heated fuel hose through which the fuel flows. This product is intended for…

  • 600015158 HMRC 9 March 2026 – 8 March 2029 · 8409 99 00 90

    The stator is a vital component of a diesel fuel injector assembly. It is situated within the injector body and forms an integral part of the injector’s electromagnetic actuator system. When electrical current is supplied to the windings, the stator generates a precise electromagnetic field that…

  • 600014502 HMRC 26 February 2026 – 25 February 2029 · 8409 99 00 90

    The stator is an integral component of a diesel fuel injector assembly. It is installed within the injector body and forms part of the injector’s electromagnetic actuator system. When electrical current is applied to the windings, the stator generates a controlled electromagnetic field which…

  • 600011968 HMRC 6 December 2024 – 5 December 2027 · 8409 99 00 90

    A disk of steel is rotated whilst a form tool presses against it while it is rotating to produce circular shapes in a process known as spinning. In this case the disc is spun into a tubular shape with a flange. Holes are added to the flange so that the hose adaptor can be bolted to the valve and…

25 rulings in total for this code

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 →

HTS code 8409.99.92 is a line of the Harmonized Tariff Schedule of the United States under HS 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 8409.99.92?

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 8409.99.92 under US trade agreements?

Yes. The Special column reads “Free (A, AU, 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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