# HS code 8408.90: Other engines

> HS code 8408.90 covers other engines. It sits in heading 84.08 (compression-ignition internal combustion piston engines (diesel or semi-diesel engines)) in chapter 84 (nuclear reactors, boilers, machinery and mechanical appliances; parts thereof). Other goods of heading 84.08 are classified under 8408.10 (marine propulsion engines) or 8408.20 (engines of a kind used for the propulsion of vehicles of Chapter 87). National tariff lines under 8408.90 are live on border.bot for the United States (7 lines, also used by 1 other country).

Source: https://border.bot/hs-codes/840890
Last updated: 11 October 2026

[HS codes](https://border.bot/hs-codes) / [Chapter 84](https://border.bot/hs-codes/84) / [84.08](https://border.bot/hs-codes/8408) / [8408.90](https://border.bot/hs-codes/840890)

## Key facts

- HS code: 8408.90
- Covers: Other engines
- Heading: [84.08: Compression-ignition internal combustion piston engines (diesel or semi-diesel engines)](https://border.bot/hs-codes/8408)
- Chapter: [84: Nuclear reactors, boilers, machinery and mechanical appliances; parts thereof](https://border.bot/hs-codes/84)
- Edition: HS2022
- Duty in the United States: [See its 7 lines](https://border.bot/countries/united-states/hs-codes/840890)

## What this code covers

HS code 8408.90 covers other engines.

The legal text of the subheading is “Other engines”, in HS2022.

## What it doesn’t cover

Other goods of heading 84.08 are classified under 8408.10 (marine propulsion engines) or 8408.20 (engines of a kind used for the propulsion of vehicles of Chapter 87).

- [8408.10](https://border.bot/hs-codes/840810) Marine propulsion engines
- [8408.20](https://border.bot/hs-codes/840820) Engines of a kind used for the propulsion of vehicles of Chapter 87

## How it is structured

8408.90 is a six-digit subheading. Its first two digits, 84, are the chapter; the first four, 8408, are heading 84.08; the last two, 90, identify the subheading within the heading.

Countries add their own digits after these six for their national tariff lines.

- Chapter 84: Nuclear reactors, boilers, machinery and mechanical appliances; parts thereof
- Heading 84.08: Compression-ignition internal combustion piston engines (diesel or semi-diesel engines)
- Subheading 8408.90: Other engines

## In other countries

National tariff lines under 8408.90 are live on border.bot for the United States (7 lines, also used by 1 other country).

- [United States](https://border.bot/countries/united-states/hs-codes/840890): 7 lines, used by 1 other country

- Previous subheading: [8408.20](https://border.bot/hs-codes/840820) Engines of a kind used for the propulsion of vehicles of Chapter 87
- Next subheading: [8409.10](https://border.bot/hs-codes/840910) For aircraft engines

## Frequently asked questions

### What does HS code 8408.90 cover?

HS code 8408.90 covers other engines.

### Which heading and chapter is HS code 8408.90 in?

HS code 8408.90 is in heading 84.08 (compression-ignition internal combustion piston engines (diesel or semi-diesel engines)) in chapter 84 (nuclear reactors, boilers, machinery and mechanical appliances; parts thereof).

### Where are goods of heading 84.08 classified when 8408.90 doesn’t fit?

Other goods of heading 84.08 are classified under 8408.10 (marine propulsion engines) or 8408.20 (engines of a kind used for the propulsion of vehicles of Chapter 87).

### Which countries’ tariffs list national lines under HS code 8408.90?

National tariff lines under 8408.90 are live on border.bot for the United States (7 lines, also used by 1 other country).

## Sources and updates

The Harmonized System legal text comes from border.bot release 2 (edition HS 2022), imported from a file, and has been live since 11 October 2026.

This page was last updated on 11 October 2026.

Guidance from published tariff data, not a binding ruling. For a decision customs must follow, apply to the destination’s customs authority for a binding tariff ruling.

Machine-readable: https://border.bot/hs-codes/840890.json