Thousands of storefronts sell Chinese food trailers. 106 Chinese trailer makers are registered with NHTSA.

1. Before relying on a seller’s US-shipping claim

Identify the manufacturer of record first. The counts below define the public list you can check against.

Two readings worth pausing on. First, China is the second-largest registrant country overall (2,589), the filing route is plainly usable from China. Second, within those Chinese registrations, trailers (106) sit far below motorcycles (224): the categories Chinese factories export in volume are not the categories most represented in the vehicle filings. The full country × type table is in the JSON snapshot. The 106 Chinese trailer registrants are published as a CSV list (vPIC ID and registered name).

Retested 28 days later: five added, none removed

A count is only as good as its date. On 6 September 2026 the same census ran again: same public endpoint, same paging, same de-duplication, same country handling. The two China trailer lists were then matched by vPIC manufacturer id.

Matching the two lists by id gives the part a total cannot show: five manufacturers were added and none dropped out. All five carry ids from 25814 to 25886. The August list topped out at 25777, so these look like newly issued registrations, and less like existing manufacturers adding a trailer type. The five are QINGDAO LETSING TECHNOLOGY, JINAN DACHENG INTELLIGENT TECHNOLOGY, LAIZHOU SUNPOWER MACHINERY, SHLEME POWER and HANGZHOU PERFECT TOTAL MACHINERY.

What this retest can and cannot say. It compares two snapshots, so it shows net membership change; the endpoint carries no filing date. The id argument above is strong but unproven, because vPIC does not document how ids are assigned. The practical point for a buyer holds either way. A saved copy of this list was already out of date within a month. A supplier absent in August can be present now, so read the live record. The 6 September snapshot is published as JSON and CSV, and the census is repeatable with scripts/census-vpic-manufacturers.mjs.

2. How a buyer uses a number like this

• Ask the specific question. Not “are you NHTSA compliant?” but: which registered manufacturer will my trailer’s VIN decode to? The answer is a name you can look up yourself in vPIC, free, no account.
• Read the answer like a record, not a verdict. A seller trading for a listed factory is ordinary. Ask for the relationship in writing and match it against the Chinese registered record. A seller who cannot name any manufacturer of record has answered a different question: nobody identifiable stands behind the vehicle paperwork.
• Cross the two systems. The NHTSA name is an English filing. The Chinese side has the registered company behind it, the GSXT record. Reading that record to verify Chinese company facts, status, scope, the invoicing entity, is the half a US database cannot show.

3. Method, and what this count cannot say

• Source and coverage: NHTSA’s public vPIC GetAllManufacturers endpoint, paged exhaustively: 229 pages at 100 records, 22,881 manufacturers, captured 9 August 2026. No sampling.
• Counting rule: a manufacturer counts for a vehicle type if that type appears in its vPIC vehicle-type list; country is the registrant’s own filed country, normalised. “Trailer” is vPIC’s category. It includes all trailer kinds, not food trailers specifically.
• A filing database, not a compliance register: registration under 49 CFR Part 566 is self-submitted identifying information. Listed ≠ compliant or good; absent ≠ violating. Production can be registered under a different corporate name, and the database moves as filings arrive. This is a dated snapshot.
• Transport note: the API served direct connections and refused our proxy egress (TLS-level failure, consistent with our earlier government-host observations) — recorded so others measuring from unusual network paths know what to expect.

Citing this study

You are welcome to quote or reproduce these figures, including commercially, provided the snapshot date (9 August 2026) and the stated limits travel with them. The database changes as filings arrive, so the date is load-bearing. Data: full JSON snapshot · 106-name CSV. Both files are archived under a citable DOI: 10.5281/zenodo.21859686. Primary sources: NHTSA vPIC and 49 CFR Part 566, checked 9 August 2026. More measured data: the research index.

Archived copies, each with its own DOI, resolving independently of this site: Zenodo · Harvard Dataverse · figshare.

A citation with everything it needs:

Currawong, “How many Chinese trailer makers are NHTSA-registered?”, every entry in the public NHTSA vPIC manufacturer database captured 9 August 2026, with the full 106-name Chinese trailer-manufacturer list. https://currawongweb.com/verify/china-trailer-manufacturers-nhtsa-study/ Dataset: https://doi.org/10.5281/zenodo.21859686

@dataset{currawong_verify_china_trailer_manufacturers_nhtsa_study_2026,
  author    = {Bao L. Zhou},
  title     = {{NHTSA vPIC manufacturer census by country and vehicle type, with the Chinese trailer-manufacturer list}},
  year      = {2026},
  publisher = {Zenodo},
  doi       = {10.5281/zenodo.21859686},
  url       = {https://doi.org/10.5281/zenodo.21859686}
}