2022 NAICS industry in sector 31-33 Manufacturing
33621 Motor Vehicle Body and Trailer Manufacturing
NAICS 33621 is the US industry code for motor vehicle body and trailer manufacturing. It covers establishments primarily engaged in (1) manufacturing motor vehicle bodies and cabs or (2) manufacturing truck, automobile and utility trailers, truck trailer chassis, detachable trailer bodies, and detachable trailer chassis.
Official definition
This industry comprises establishments primarily engaged in (1) manufacturing motor vehicle bodies and cabs or (2) manufacturing truck, automobile and utility trailers, truck trailer chassis, detachable trailer bodies, and detachable trailer chassis. The products made may be sold separately or may be assembled on purchased chassis and sold as complete vehicles. Motor homes are units where the motor and the living quarters are contained in the same integrated unit, while travel trailers are designed to be towed by a motor unit, such as an automobile or a light truck.
Examples Census gives
- Bodies and cabs, truck, manufacturing
- Camper units, slide-in, for pick-up trucks, manufacturing
- Pick-up canopies, caps, or covers manufacturing
- Motor homes, self-contained, assembling on purchased chassis
- Semi-trailers manufacturing
- Travel trailers, recreational, manufacturing
When to use a different code
Census classifies these close-sounding activities somewhere else. Businesses mainly engaged in:
- Making manufactured homes (i.e., mobile homes) are classified in Industry 32199, All Other Wood Product Manufacturing.
- Customizing automotive vehicle and trailer interiors (i.e., van conversions) on an individual basis are classified in Industry 81112, Automotive Body, Paint, Interior, and Glass Repair.
- Manufacturing complete automobiles and light duty motor vehicles (i.e., body and chassis or unibody) or manufacturing automobile and light duty motor vehicle chassis only are classified in Industry 33611, Automobile and Light Duty Motor Vehicle Manufacturing.
- Manufacturing heavy duty trucks, buses, motor homes, and other special purpose heavy duty motor vehicles for highway use (i.e., body and chassis) or manufacturing heavy duty truck chassis only are classified in Industry 33612, Heavy Duty Truck Manufacturing.
Codes in 33621
Data last changed November 14, 2026. How this page is built.