NAICS 336310

Overview

The North American Industry Classification System (NAICS) is the federal statistical standard for categorizing business establishments to collect, analyze, and publish data on the U.S. economy. Developed under the Office of Management and Budget and adopted in 1997, it is maintained jointly with Statistics Canada and Mexico’s INEGI; the current structure includes a 2022 vintage used across Economic Census products. ¹

NAICS 336310 — Motor Vehicle Gasoline Engine and Engine Parts Manufacturing — covers establishments primarily engaged in manufacturing and/or rebuilding gasoline engines for motor vehicles and related engine components such as carburetors, pistons, piston rings, valves, manifolds, timing components, and mechanical fuel, oil, or water pumps. Census cross-references distinguish this industry from electrical/electronic vehicle equipment, transmission/power train parts, radiators, and other parts industries. ²

See also on G2X:

• G2X — NAICS 336350
• G2X — NAICS 336320

What this NAICS covers

• Manufacturing of complete gasoline engines for motor vehicles. ²
• Rebuilding of motor vehicle gasoline engines. ²
• Manufacture of carburetors and fuel‑injection systems for gasoline engines. ²
• Manufacture of pistons and piston rings, cylinder heads, crankshafts, and camshafts. ²
• Manufacture of intake and exhaust manifolds and engine valves. ²
• Manufacture of mechanical engine pumps (fuel, oil, water) and positive crankcase ventilation components. ²
• Manufacture of timing gears, chains, and related engine timing components. ²

Related NAICS and PSC codes

NAICS descriptors per U.S. Census NAICS entries. ²
PSC descriptors per the GSA Product and Service Code Manual (April 2025). ⁴

Common cross‑references and exclusions

• Diesel and semidiesel engines and components are classified in NAICS 333618, not 336310. ³
• Vehicular wiring harnesses and other electrical/electronic equipment fall under NAICS 336320. ²
• Transmission and power train components are classified in NAICS 336350. ²
• Radiators and certain other parts are classified in NAICS 336390. ²
• Parts made on a job or shop basis for machine repair are classified in NAICS 332710 (Machine Shops). ²

Frequently asked questions

• What products are included in NAICS 336310?
  Included are gasoline engines for motor vehicles and a wide range of engine parts such as carburetors, pistons and rings, valves, manifolds, timing gears/chains, and mechanical engine pumps; rebuilding of gasoline engines is also included. ²
  See also on G2X: NAICS 336310

• Does NAICS 336310 cover diesel engines?
  No. Diesel and semidiesel engines are classified in NAICS 333618. NAICS 336310 pertains to gasoline engines and related parts only. ³

• How does NAICS 336310 differ from NAICS 336350?
  NAICS 336350 covers transmissions, axles, and power train parts, whereas NAICS 336310 covers gasoline engines and engine components. Census cross‑references separate these activities. ²

• Which PSC codes commonly align to gasoline engine and parts buys?
  PSC 2805 (gasoline reciprocating engines and components) and PSC 2910 (engine fuel system components, nonaircraft) frequently align with gasoline engine/parts requirements. Always confirm specifics in the solicitation. ⁴
  See also on G2X: PSC 2805

• Are wiring harnesses or radiators part of NAICS 336310?
  No. Wiring harnesses and most vehicular electrical/electronic equipment fall under NAICS 336320; radiators and certain other parts are in NAICS 336390. ²

Useful resources

• G2X — NAICS 336310
• Census: NAICS overview and structure; 2022 Economic Census uses 2022 NAICS vintage. ¹
• Census: NAICS 336310 detailed entry with definition and cross‑references. ²
• GSA/Acquisition.gov: Product and Service Code (PSC) Manual (April 2025). ⁴

References

1. U.S. Census Bureau — Economic Census: NAICS Codes & Understanding Industry Classification Systems. https://www.census.gov/programs-surveys/economic-census/technical-documentation/code-lists/understanding-naics-redirect.html
2. U.S. Census Bureau — 2022 NAICS Search: 336310 Motor Vehicle Gasoline Engine and Engine Parts Manufacturing (definition and cross‑references). https://www.census.gov/naics/?year=2022&input=336310&details=336310
3. U.S. Census Bureau — 2022 NAICS Search: 333618 Other Engine Equipment Manufacturing (diesel and semidiesel engines). https://www.census.gov/naics/?year=2022&input=333618&details=333618
4. Acquisition.gov — Product and Service Code (PSC) Manual. https://www.acquisition.gov/psc-manual