NAICS Code 336310 — Motor Vehicle Gasoline Engine and Engine Parts Manufacturing

National Industry in the official 2022 North American Industry Classification System (U.S. Census Bureau). It is the only national industry under 33631 (Motor Vehicle Gasoline Engine and Engine Parts Manufacturing).

Code	336310
Title	Motor Vehicle Gasoline Engine and Engine Parts Manufacturing
Level	National Industry (6-digit)
Edition	NAICS 2022 edition
SBA size standard	1,050 employees

Official definition (2022 NAICS)

This industry comprises establishments primarily engaged in (1) manufacturing and/or rebuilding motor vehicle gasoline engines and engine parts and/or (2) manufacturing and/or rebuilding carburetors, pistons, piston rings, and engine valves, whether or not for vehicular use.

Illustrative Examples:

Carburetors, all types, manufacturing

Crankshaft assemblies, automotive and truck gasoline engine, manufacturing

Cylinder heads, automotive and truck gasoline engine, manufacturing

Fuel injection systems and parts, automotive and truck gasoline engine, manufacturing

Gasoline engines for hybrid automotive vehicles manufacturing

Pistons and piston rings manufacturing

Manifolds (i.e., intake and exhaust), automotive and truck gasoline engine, manufacturing

Pumps (e.g., fuel, oil, water), mechanical, automotive and truck gasoline engine (except power steering), manufacturing

Timing gears and chains, automotive and truck gasoline engine, manufacturing

Valves, engine, intake and exhaust, manufacturing

Is a business under 336310 "small"?

Under the SBA size standards (13 CFR 121.201, effective March 17, 2023), a business classified in NAICS 336310 qualifies as a small business if it does not exceed 1,050 employees. Small-business status determines eligibility for federal set-aside contracts, SAM.gov certifications and SBA loan programs — employee count is averaged over the latest 24 months.

Where 336310 sits in the hierarchy

Level	Code	Title
Sector	31-33	Manufacturing
Subsector	336	Transportation Equipment Manufacturing
Industry Group	3363	Motor Vehicle Parts Manufacturing
NAICS Industry	33631	Motor Vehicle Gasoline Engine and Engine Parts Manufacturing
National Industry	336310	Motor Vehicle Gasoline Engine and Engine Parts Manufacturing

No direct SIC mapping is shown for this code: it was introduced or redefined after the official 1987 SIC ↔ 2002 NAICS concordance. Use the crosswalk tool to explore related legacy codes.

Data: official 2022 NAICS structure, descriptions and Census concordances, U.S. Census Bureau — U.S. government works in the public domain (17 U.S.C. §105). Suggested reference, not an official determination.