Market Data

Do Auto Parts Count as Vehicle Imports? Inside the $29.03B Monthly Census Line

Assembled cars and the parts that build them travel under different codes. Knowing which sits in the $29.03B figure changes how you read the trade data.

The $29.03B monthly U.S. vehicle import line, the Census International Trade reading as of May 2026, down about 0.2% from a year ago, covers finished, assembled vehicles: passenger cars, trucks and buses under HS Chapter 87's vehicle headings. It excludes most auto parts, which are tallied on separate lines. That distinction means the headline vehicle number understates total automotive trade once engines, transmissions and components are added back.

Where the boundary actually falls

The line is drawn by the Harmonized System. Assembled vehicles enter under headings such as 8703 (passenger cars) and 8704 (goods vehicles), and those are what this series counts. Engines land in Chapter 84, wiring harnesses in Chapter 85, tires in Chapter 40, and the broad parts heading 8708, everything from bumpers to gearboxes, sits in Chapter 87 but outside the vehicle headings this line tracks. The boundary produces real analytical traps. A pickup assembled in Mexico from a U.S.-made engine and transmission counts its full customs value here, double-counting American content that already crossed the border twice. Conversely, a "knock-down kit", a vehicle shipped disassembled for local final assembly, can classify as parts and vanish from this line entirely. Anyone comparing this figure with "auto industry" trade claims should first ask which headings the claim includes; the difference is not rounding error, because parts flows are themselves enormous.

Why the definition changes the reading

The finished-vehicle line and the parts lines answer different questions. This series tracks what dealers will sell: it is a consumer-demand and dealer-inventory signal, set by import decisions made months before the vehicles land. Parts flows track what factories will build: they feed U.S. assembly plants, which install imported components into "domestic" vehicles, the average American-assembled vehicle carries substantial foreign content. Trade policy treats the two differently as well: tariff actions have at times hit vehicles and parts at different rates and on different schedules, and USMCA regional-content rules apply component-by-component. So a month in which this line is rising while parts imports diverge is not a contradiction, it is the signature of assembly work migrating in one direction or the other. Compliance managers should classify to the heading, not the headline.

U.S. vehicle imports per month, May 2026: $29.03B. Ranged from $22.10B in Jan 2026 to $193.34B in Apr 2026 across the archived history (Census International Trade).

The vehicle line tracks what dealers will sell. The parts lines track what factories will build. Conflating them misreads both.

Sizing the line in units, not just dollars

The dollar figure becomes more intuitive as units. At an illustrative average customs value of $30,000 per vehicle, the current $29.03B monthly flow implies on the order of 967,720 vehicles landing per month, an approximation, since the true mix spans economy cars to premium SUVs, but the right order of magnitude for capacity planning. Annualized, the dollar pace is $348.38B. Remember what is not in either number: the imported engines, electronics and modules inside U.S.-assembled vehicles. A sourcing analyst who wants total automotive import exposure needs this line plus the parts headings; a demand analyst tracking dealer supply needs this line alone. Knowing which analyst you are is the whole game.

Use the tariff impact calculator to see what a duty-rate change does to the landed cost of an imported vehicle or component before it reaches your P&L. Model a duty scenario

Published 2026-07-13.