NAICS 336390

Overview

The North American Industry Classification System (NAICS) is the federal standard for classifying business establishments to collect, analyze, and publish statistics about the U.S. economy. Developed under the Office of Management and Budget and adopted in 1997 to replace SIC, NAICS was jointly created with Statistics Canada and Mexico’s INEGI to enable comparability; the current classification vintage used for Economic Census statistics is 2022. ¹
U.S. Industry Group 336390 (Other Motor Vehicle Parts Manufacturing) covers establishments primarily engaged in manufacturing or rebuilding motor vehicle parts and accessories not included in dedicated engine, electrical/electronic, steering/suspension, brake, transmission/power train, seating/trim, or stamping industries; its U.S. national industries include 336391 and 336399. ²

• See also on G2X:
  • NAICS 336390
  • NAICS 336391
  • NAICS 336399

What this NAICS covers

Representative activities under 336390 include: ²

• Manufacturing vehicle air-conditioning systems and compressors (U.S. industry 336391).
• Manufacturing air bag assemblies and related safety restraint components (U.S. industry 336399).
• Manufacturing catalytic converters and other exhaust aftertreatment components.
• Manufacturing mufflers, resonators, and related exhaust system parts.
• Rebuilding or remanufacturing miscellaneous motor vehicle parts and accessories not elsewhere classified.
• Manufacturing convertible tops and similar vehicle accessories (classified in U.S. industry 336399).

Related NAICS and PSC codes

Type	Code	Descriptor
NAICS	336391	Motor Vehicle Air-Conditioning Manufacturing
NAICS	336399	All Other Motor Vehicle Parts Manufacturing
PSC	2530	Vehicular Brake, Steering, Axle, Wheel, and Track Components
PSC	2590	Miscellaneous Vehicular Components

PSC descriptors per the official PSC Manual. ³

Exclusions and cross-references

Key exclusions per Census cross-references; activities below are classified outside 336390. ²

• Engine and engine parts: 336310.
• Electrical and electronic equipment (e.g., wiring harnesses, lighting): 336321, 336322.
• Steering and suspension components (except springs): 336330.
• Brake systems and components: 336340.
• Transmission and power train parts: 336350.
• Seating and interior trim: 336360.
• Metal stamping for motor vehicles: 336370.

Frequently asked questions

• What does NAICS 336390 include?
  It encompasses establishments primarily engaged in manufacturing or rebuilding motor vehicle parts and accessories not assigned to specialized engine, electrical, steering/suspension, brake, transmission/power train, seating/trim, or stamping industries. Examples include air bags, catalytic converters, mufflers, and vehicle air-conditioning systems. ²
  See also on G2X: NAICS 336391, 336399.

• Are convertible tops and air bags covered here?
  Yes. Convertible tops and air bags are classified in U.S. industry 336399, which rolls up under industry group 336390 (Other Motor Vehicle Parts Manufacturing). ²

• Does 336390 include remanufacturing/rebuilding?
  Yes. The Census definition explicitly covers establishments engaged in manufacturing and/or rebuilding of motor vehicle parts and accessories, provided the items are not classified in the excluded specialized industries. ²

• How do PSC codes relate to 336390 in procurement?
  NAICS codes classify the supplier’s primary industry; PSC codes describe what is bought. For vehicular parts under this NAICS, agencies often use PSC classes such as 2530 and 2590, per PSC Manual descriptors. ³

• What is the current NAICS vintage used for Census publications?
  Economic Census statistics are published on the 2022 NAICS basis; that vintage governs current industry code structures for manufacturing, including 336390. ⁴

Useful resources

• G2X — NAICS 336390
• U.S. Census — NAICS 2022: Industry structure and definitions for Other Motor Vehicle Parts Manufacturing (industry group 33639): https://www.census.gov/naics/?input=33639&year=2022
• U.S. Census — NAICS search result for 336390 context within 33639: https://www.census.gov/naics/?input=336390&year=2022
• Acquisition.gov — Product and Service Code (PSC) Manual: https://www.acquisition.gov/psc-manual
• SBA — Table of Small Business Size Standards (for size-standard lookups by NAICS): https://www.sba.gov/document/support--table-size-standards

References

1. U.S. Census Bureau — 2017 North American Industry Classification System (NAICS) Manual (About NAICS, OMB, 1997 adoption). https://www.census.gov/library/publications/2017/econ/2017-naics-manual.html
2. U.S. Census Bureau — NAICS 2022: Industry group 33639 (Other Motor Vehicle Parts Manufacturing) definitions and structure. https://www.census.gov/naics/?input=33639&year=2022
3. Acquisition.gov — Product and Service Code (PSC) Manual. https://www.acquisition.gov/psc-manual
4. U.S. Census Bureau — NAICS 2022 guidance (Understanding NAICS). https://www.census.gov/programs-surveys/economic-census/year/2022/technical-documentation/code-lists/understanding-naics-redirect.html