33639 - Other Motor Vehicle Parts Manufacturing

The North American Industry Classification System (NAICS) Code 33639 represents a vital and specialized segment of the manufacturing sector focused on producing various motor vehicle parts. If you’re involved in government contracting, supply chain management, or the automotive industry, understanding NAICS code 33639—Other Motor Vehicle Parts Manufacturing—is essential for identifying business opportunities and compliance requirements.

What is NAICS Code 33639?

NAICS 33639 covers establishments primarily engaged in the manufacturing of motor vehicle parts excluding:

• Engine parts
• Motor vehicle electrical and electronic equipment
• Motor vehicle body and trailer parts

This classification includes the production of various specialized components that are critical for vehicle function and safety.

Sector: Manufacturing

NAICS code 33639 belongs to the Manufacturing Sector, specifically within the motor vehicle parts manufacturing subsector. Businesses under this code are instrumental in supporting the automotive industry with key components such as steering, suspension, braking, and fuel system parts.

Typical Business Activities Under NAICS 33639

Businesses operating within NAICS 33639 typically engage in:

• Manufacture of motor vehicle steering components (e.g., steering gears, linkage, and pumps)
• Production of motor vehicle suspension components (e.g., springs, shock absorbers, and control arms)
• Manufacturing motor vehicle braking systems (e.g., brake pads, discs, calipers)
• Manufacture of fuel system parts (e.g., carburetors, fuel pumps, fuel tanks)

These activities support the assembly and repair of passenger vehicles, trucks, and other motorized transportation.

Size Standards for NAICS 33639

For eligibility in federal contracts and small business programs, the Small Business Administration (SBA) defines size standards based on average annual receipts or number of employees. For NAICS code 33639:

Criteria	Size Standard
Small Business Size Standard	$39.5 million in average annual receipts

Businesses meeting this threshold are typically considered small and eligible for small business contracting preferences.

Examples of Businesses Under NAICS 33639

• A manufacturing firm producing steering gears and steering columns for automobiles
• A company specializing in vehicle suspension springs and shock absorbers
• A factory producing brake pads, rotors, and calipers for light and heavy-duty trucks
• A business manufacturing fuel system components such as fuel pumps and carburetors for motor vehicles

These companies are crucial suppliers to automotive OEMs (Original Equipment Manufacturers) and aftermarket parts distributors.

NAICS Code 33639 Details at a Glance

NAICS Code	Title	Sector	Description	Size Standard	Examples of Activities
33639	Other Motor Vehicle Parts Manufacturing	Manufacturing	Manufacturing motor vehicle parts excluding engine parts, electronics, and body/trailer parts; includes braking, steering, and suspension components	$39.5 million average annual receipts	Steering components, suspension systems, braking systems, fuel system parts

Frequently Asked Questions (FAQ) About NAICS Code 33639

What types of motor vehicle parts are excluded from NAICS 33639?

NAICS 33639 excludes the manufacturing of engine parts, motor vehicle electrical and electronic equipment, and motor vehicle body or trailer parts. Those fall under separate NAICS codes such as 33631 (Motor Vehicle Gasoline Engines and Engine Parts) and 33632 (Motor Vehicle Electrical and Electronic Equipment Manufacturing).

How can I determine if my business falls under NAICS 33639?

If your primary business activity involves manufacturing specialized mechanical parts like steering, suspension, braking, or fuel system components for motor vehicles (excluding engines and electronics), your business likely fits under NAICS 33639.

Why is it important to know the NAICS code for my business?

Identifying your NAICS code is key for government contracting, tax reporting, eligibility for small business programs, and market analysis.

What is the SBA size standard for this NAICS code?

The SBA defines a small business under NAICS 33639 as having average annual receipts of $39.5 million or less.

Can a business under NAICS code 33639 participate in government contracts?

Yes, manufacturers classified under NAICS 33639 are eligible to participate in government contracts, especially small businesses that meet SBA size standards. Proper identification of your NAICS code can help you leverage contracting opportunities.

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Conclusion

NAICS code 33639 — Other Motor Vehicle Parts Manufacturing — plays a specialized but critical role in the automotive manufacturing supply chain. Businesses engaged in producing steering systems, suspension parts, brakes, and fuel system components serve both original equipment manufacturers and the aftermarket industry. Understanding this code helps manufacturers navigate federal contracts, small business programs, and industry regulations more effectively.

If you operate within this niche, ensure you use NAICS 33639 to classify your business accurately and unlock relevant business opportunities in the manufacturing sector.