HS code for spark plugs
The U.S. HS code for spark plugs is usually 8511.10.00.00 (engine), with a 2.5% general duty and an estimated total of 15% from China and 15% from Vietnam once additional duties are added.
Estimates use tariff data as of October 22, 2026. The China and Vietnam estimates include Section 301: Forced labor action (12.5%). From China, Section 301: China list duty (7.5% or 25%) may also apply, up to 40% in total. Classifications and duty estimates are guidance based on the published HTSUS. The importer of record is responsible for the final classification.
Codes by variant
| Variant | HTS code | General duty | Est. from China |
|---|---|---|---|
| Engine | 8511.10.00.00 | 2.5% | 15% |
- 8511.10.00.00: Spark plugs
What decides the code
Spark plugs are electrical ignition equipment for internal combustion engines and are classified under heading 8511, specifically subheading 8511.10.00.00.
- The article is a spark plug, an electrical ignition component for a spark-ignition or compression-ignition engine, so it falls in heading 8511.
- Subheading 8511.10 covers spark plugs by name, so a spark plug of any engine type stays in this line.
- A glow plug is named in heading 8511 but is not a spark plug, so it does not take 8511.10.00.00.
Common mistakes
- Classifying spark plugs under 8544 as insulated wire or cable is wrong because a spark plug is an ignition device, not wiring.
- Putting spark plugs in 8536 as electrical apparatus for switching or protecting circuits is wrong because they ignite fuel, not control a circuit.
- Classifying spark plugs as parts under 8409 is wrong because heading 8511 names spark plugs directly.
Estimated U.S. duty by origin
- China
- 15% = 2.5% general + 12.5% Section 301: Forced labor actionMay also apply: Section 301: China list duty (7.5% or 25%). Up to 40%.
- Vietnam
- 15% = 2.5% general + 12.5% Section 301: Forced labor action
For HTS 8511.10.00.00, as a share of customs value, before fees. Check every measure for your entry with the tariff checker.
EU code and duty
- Engine
- CN 8511 10 00, 3.2%
EU Combined Nomenclature 2026, third-country (erga omnes) duty. Preferential rates and EU trade remedy duties are not included.
Frequently asked questions
What is the HS code for spark plugs?
The U.S. HTS code for spark plugs is usually 8511.10.00.00 (engine). The first six digits, 8511.10, are the international HS code.
What is the U.S. import duty on spark plugs from China?
The U.S. general duty on HTS 8511.10.00.00 is 2.5%. With the additional duties that apply to goods of China (Section 301: Forced labor action (12.5%)), the estimated total is 15% of customs value. Section 301: China list duty (7.5% or 25%) may also apply depending on the exact product. From Vietnam the estimate is 15%. Tariff data as of October 22, 2026.
Tariff schedule pages
- 8511.10.00.00Spark plugs
- Heading 8511Electrical ignition or starting equipment of a kind used for spark-ignition or compression-ignition internal combustion engines (for example, ignition magnetos, magneto-dynamos, ignition coils, spark plugs and glow plugs, starter motors); generators (for example, dynamos, alternators) and cut-outs of a kind used in conjunction with such engines; parts thereof
Codes checked against the USITC Harmonized Tariff Schedule retrieved October 22, 2026. Additional duties reviewed October 22, 2026. This is an estimate: the importer of record is responsible for classification.