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HSChapter 85
U.S. imports of spark plugs for internal combustion engines (HS 851110) totaled $48.6M in April 2026, traded with 34 countries.
Importers of Spark Plugs for Internal Combustion Engines paid $7.5M in duties in April 2026 — an effective duty rate of 17% on $43.6M in dutiable value, based on actual customs collections rather than the published tariff schedule.
Last updated: April 2026 dataSpark plugs are a high-volume aftermarket and OEM input for gasoline-powered automotive, marine, and small-engine applications, all consolidating into a single 10-digit line (8511100000) under this heading. The aftermarket replacement segment drives significant import activity, with product differentiation based on electrode material (copper, iridium, platinum), heat range, and thread specification rather than tariff classification. Importers should be aware that spark plugs of Chinese origin may be subject to Section 301 tariffs, while those sourced from Mexico or Canada benefit from USMCA treatment if rules-of-origin requirements are met.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
No. All spark plugs for internal combustion engines — whether for passenger vehicles, motorcycles, marine engines, or small outdoor power equipment — classify under the single line 8511100000. There is no HTS distinction based on engine size or application within this heading.
To claim USMCA preference on spark plugs from Canada or Mexico, the goods must satisfy the applicable rules of origin, typically a tariff classification change or regional value content threshold. Importers must retain a valid certification of origin and ensure the product's production history supports the claim; CBP may request supporting records during a post-entry audit.
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Monthly import values over time
HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 8511100000 | SPARK PLUGS FOR INTERNAL COMBUSTION ENGINES | $48.6M | 17.28% | $7.5M |
SPARK PLUGS FOR INTERNAL COMBUSTION ENGINES
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 8511100000 | SPARK PLUGS FOR INTERNAL COMBUSTION ENGINES | $32.4M |
SPARK PLUGS FOR INTERNAL COMBUSTION ENGINES
1.0M hun
MACH FOR RECP/CONVR/TRANS/REGN OF VOICE/IMAGE/DATA
HS 851762
SOLID-STATE NON-VOL SEMICONDUCTOR STORAGE DEVICES
HS 852351
SMARTPHONES
HS 851713
PROCESSORS AND CONTROLLERS, ELECTRONIC INTEG CIRCT
HS 854231
CONTROLS ETC W ELECT APPR F ELECT CONT NOV 1000 V
HS 853710
STATIC CONVERTERS; ADP POWER SUPPLIES
HS 850440
| State | Imports | Exports | Balance |
|---|---|---|---|
| West Virginia | $14.3M | $3.3M | -$11.0M |
| California | $11.9M | $762K | -$11.1M |
| South Carolina | $257K | $8.1M | +$7.8M |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| LOS ANGELES, CA | $24.3M | -- | -$24.3M |
| LAREDO, TX | $2.8M | $4.4M | +$1.6M |
| CLEVELAND, OH | $400K | $5.3M | +$4.9M |