HS-7 Declaration for Auto Parts and Equipment: When NHTSA Requires It

Aftermarket importers regularly assume that NHTSA paperwork is for cars, not for the parts that go on them. The regulation says otherwise. Under 49 CFR 591.5, an HS-7 declaration is required for every motor vehicle and every item of motor vehicle equipment imported into the United States. Tires, lamps, brake components, glazing, seat belts and the rest of the regulated equipment categories all enter under the same declaration regime as a finished vehicle.

The declaration is only the visible part. Behind it sit three other obligations that trip up distributors: foreign manufacturers of regulated equipment need a designated US agent, tires need valid three-symbol plant codes, and some of the fastest-selling aftermarket products, LED headlight conversion kits in particular, cannot be certified as compliant at all. This guide covers when the HS-7 declaration applies to parts and equipment, the manufacturer identification and plant code rules behind it, the LED headlight problem, and how the EPA declaration forms fit alongside it.

When the HS-7 Declaration Applies to Parts and Equipment

The National Highway Traffic Safety Administration regulates motor vehicles and motor vehicle equipment through the Federal Motor Vehicle Safety Standards. The HS-7 is the declaration an importer makes at entry about the compliance status of what it is bringing in. Section 591.5 does not limit the requirement to vehicles. It applies to every vehicle and every item of equipment, which means the question for a parts importer is not whether to file but which declaration is true for each product.

That distinction matters because the HS-7 is a declaration made by the importer, not a certificate issued by the factory. An importer that selects a declaration stating the equipment conforms to the applicable standards is taking responsibility for that statement. If the product later turns out to be non-compliant, the declaration is the document that shows what the importer said at the border.

The practical scope is wider than many distributors assume. Equipment covered by a safety standard, and equipment sold for use on regulated vehicles, both fall inside NHTSA’s reach. Powersports and UTV importers, tire importers, and lighting and wheel distributors all need an HS-7 answer for their product lines, and the answer has to be decided per product, not per supplier.

How the Declaration Is Filed and What It States

The HS-7 is normally filed electronically with the customs entry, as NHTSA data in ACE, although 49 CFR 591.5 still accepts any paper or electronic format CBP accepts. The broker transmits it, but the content comes from the importer, and the broker cannot choose a declaration without facts about the product.

The form is organized as a set of numbered boxes, each representing a different basis on which a vehicle or item of equipment may be imported. One basis covers products manufactured to conform with the applicable standards and certified by their manufacturer. Others cover products imported for specific limited purposes or under particular exemptions. The importer declares one box per line, and that choice has to match the product’s real status and the documentation held in the file.

The file behind each declaration should hold the manufacturer’s certification of compliance, the applicable standard, the manufacturer identification on record with NHTSA, and, for tires, the plant code. A declaration made without that file is a guess, and the risk of a wrong guess falls on the importer of record. Our licensed customs brokerage team treats the HS-7 box selection as a classification-level decision for exactly that reason.

Manufacturer Identification and the US Agent Requirement

NHTSA needs to know who made the equipment and how to reach them. Part 566 requires manufacturers of motor vehicles and of certain regulated equipment to submit identification information to NHTSA. For foreign manufacturers, 49 CFR Part 551, Subpart D (sections 551.45 to 551.46) adds a second step: foreign manufacturers, assemblers and importers of motor vehicles or motor vehicle equipment must designate a US agent for service of process before offering goods for importation.

For an importer, both requirements work as a supplier qualification check. A foreign factory that has never filed its manufacturer identification or designated a US agent is a factory whose products the importer should not be declaring as compliant. The paperwork is short, but its absence is a strong signal that the manufacturer has not engaged with the US regulatory system at all.

The check belongs at onboarding, not at entry. Before the first purchase order, confirm that the manufacturer is identified with NHTSA and that its US agent designation is on file. Where the importer is itself a foreign company without a US presence, the same agent and identification questions come up from the other direction, a topic covered in our guide for the non-resident importer.

Tire Plant Codes After April 13, 2025

Tires carry a Tire Identification Number, and the first part of it is a plant code assigned by NHTSA to the factory that made the tire. Under 49 CFR 574.5, plant codes now have three symbols. Two-symbol codes were allowed only until April 13, 2025, and tires made after that date need to carry the three-symbol format.

For tire importers, the plant code is the link between the product and a manufacturer NHTSA recognizes. A tire whose plant code does not match a registered factory, or that carries an outdated two-symbol code on recent production, is a tire the importer cannot comfortably declare as compliant. The fix is upstream: verify the plant code for each factory at supplier approval, and verify on arrival samples that the tires actually carry it.

Plant code checks fit naturally into the same item master that holds the HTS code and the HS-7 box selection. Importers already running a trade compliance management program can add the plant code and its verification date as fields on each tire SKU, so a factory change triggers a review rather than an entry problem.

LED Headlight Kits and Non-Compliant Equipment

LED headlight conversion kits are among the most common aftermarket lighting products, and they are the clearest example of equipment that cannot be declared compliant. In interpretation letter NCC-230201-001, NHTSA stated that LED replacement bulbs cannot be used in headlamps designed for halogen bulbs. A headlamp is designed and tested as a system under FMVSS No. 108, and swapping the light source changes the system the manufacturer certified.

The consequence for importers is direct. A kit marketed to replace halogen bulbs with LED bulbs in an existing headlamp is not equipment that can truthfully be declared as conforming. NHTSA looks at what a product is designed and sold to do, so an “off-road use only” or “for show” label on the packaging is unlikely to change how the kit is treated. Importers of these kits carry the exposure of the HS-7 declaration they sign.

The same logic reaches other aftermarket equipment. Any product that, once installed, takes a regulated component outside the configuration its manufacturer certified raises the same question. Treat those lines the way you would treat any other restricted imports: settle the compliance status before booking, not after a detention notice.

The EPA 3520-1 and 3520-21 Overlay

NHTSA is not the only agency with a declaration at the border. The EPA import declaration forms, 3520-1 for vehicles and engines and 3520-21 for certain engines and equipment, remain in force and sit alongside the HS-7. For importers of engines, powersports vehicles and some powered equipment, both agencies need an answer on the same entry.

The two regimes do not use the same thresholds. EPA’s age-based exemption for older vehicles is generally described as 21 years, against NHTSA’s 25-year rule, so a vehicle can be old enough to escape one regime and still be caught by the other. Importers should check both rather than assume an exemption under one carries across.

The EPA landscape also shifted in 2026. Vehicle greenhouse gas standards were rescinded effective April 20, 2026, but criteria-pollutant certification remains. For importers, that means the EPA declaration and the certification behind it are still required even though one set of standards is gone. Keeping both declarations in the same compliance file, alongside the HTS classification that drives the duty, avoids the common gap where one agency’s filing is handled and the other is forgotten.

What Aftermarket Importers Should Check Before the Next Booking

Start with the product list. For every SKU that is a motor vehicle, an item of regulated equipment, or equipment sold for use on regulated vehicles, record the HS-7 declaration box, the applicable standard, and where the manufacturer’s certification is held. Products that cannot be tied to a declaration should not be booked until they can.

Then verify the suppliers. Each foreign vehicle or regulated-equipment manufacturer (other than tire makers) should have identification on file under Part 566 and a US agent under Part 551, and each tire factory should have a verified three-symbol plant code under 574.6. Lighting lines need a specific review against the LED interpretation, and anything sold as an LED conversion for halogen headlamps should come off the plan.

Finally, align the entry process. The broker needs the HS-7 and EPA data with the commercial documents, and the declarations have to match the CBP Form 7501 lines they sit on. A signed customs power of attorney lets the broker file on the importer’s behalf, but it does not transfer responsibility for what the declarations say.

Frequently Asked Questions