NAICS 336360 Quarterly Industry Report
Motor Vehicle Seating and Interior Trim Manufacturing
Comprehensive industry research for valuation professionals, business owners, buyers, and lenders
NAICS Code: 336360Sector: 33Updated: Q1 2026
About This Report
This Fair Market Value industry report for NAICS 336360 draws on verified data from the U.S. Census Bureau[5], Bureau of Labor Statistics[6], and the Small Business Administration[7]. Our research team compiles establishment counts, employment data, and SBA eligibility criteria specific to motor vehicle seating and interior trim manufacturing. Reports are updated quarterly to reflect new Census releases and regulatory changes.
Industry Snapshot
Key metrics for the motor vehicle seating and interior trim manufacturing industry.
Industry Definition & Overview
Motor Vehicle Seating and Interior Trim Manufacturing (NAICS 336360) encompasses establishments primarily engaged in manufacturing motor vehicle seating, seat frames, seat covers, headliners, door panels, carpet systems, instrument panel skins, and other interior trim components. Products include complete seat assemblies with integrated heating, ventilation, and power adjustment mechanisms; headliner assemblies with integrated wiring, sunroof mechanisms, and lighting; door trim panels with speaker grilles and armrest assemblies; and floor carpet systems with sound deadening layers. The U.S. Census Bureau[5] classifies this industry under motor vehicle parts manufacturing.
Roughly 715 active businesses employ an estimated 87,400 workers in this industry. Seating represents the largest product segment and one of the most labor-intensive components in vehicle assembly. Tier 1 seat suppliers including Lear, Adient, and Magna Seating operate just-in-sequence (JIS) production facilities adjacent to or near vehicle assembly plants, building seats to match each vehicle's specific configuration as it moves down the assembly line. Delivery windows for JIS operations typically run two to four hours from order receipt to dock delivery.
Manufacturing processes vary by product: seat frame production involves stamping, welding, and electrophoretic coating of steel structures; foam cushion production uses polyurethane pour-in-place molding in heated molds; seat cover sewing operations cut and stitch leather, vinyl, and cloth materials; headliner production laminates fabric to fiberglass substrate and integrates wiring for overhead consoles, lighting, and ADAS cameras. Interior trim part production uses injection molding, vacuum forming, and compression molding of thermoplastic and thermoset materials for door panels, console components, and instrument panel elements. Automotive interior quality standards emphasize appearance consistency, tactile properties, and resistance to UV fading, temperature cycling, and passenger wear throughout the vehicle warranty period.
What's Included in This Industry
- Complete seat assembly manufacturing for vehicles
- Seat frame stamping and welding production
- Seat foam cushion molding operations
- Seat cover cutting and sewing
- Headliner assembly manufacturing
- Door trim panel production
- Automotive carpet system manufacturing
- Instrument panel component production
- Console and armrest manufacturing
- Interior plastic trim molding operations
NAICS Classification Hierarchy
| Level | Description | Code |
|---|---|---|
| Subsector | Transportation Equipment Manufacturing | 336 |
| Industry Group | Motor Vehicle Parts Manufacturing | 3363 |
| NAICS Industry | Motor Vehicle Seating and Interior Trim Manufacturing | 33636 |
| National Industry | Motor Vehicle Seating and Interior Trim Manufacturing | 336360 |
Related NAICS Codes
| Code | Description | Relationship |
|---|---|---|
| 336390 | Other Motor Vehicle Parts Manufacturing | Manufactures other motor vehicle parts not specifically classified in seating, engine, brake, or electrical categories separate from the interior trim and seat products produced here |
| 336320 | Motor Vehicle Electrical and Electronic Equipment Manufacturing | Produces motor vehicle electrical equipment including heated seat elements and power adjustment motors that integrate into the seat assemblies manufactured in this classification |
| 336310 | Motor Vehicle Gasoline Engine and Engine Parts Manufacturing | Manufactures gasoline engines classified under powertrain rather than the passenger compartment seating and interior components produced in this interior trim industry |
| 337127 | Institutional Furniture Manufacturing | Produces institutional furniture including vehicle and public transit seating classified under furniture manufacturing rather than dedicated automotive seat production |
| 336211 | Motor Vehicle Body Manufacturing | Manufactures complete motor vehicle bodies that house the interior trim and seating components produced here but classifies under body manufacturing rather than interior parts |
| 326150 | Urethane and Other Foam Product (except Polystyrene) Manufacturing | Produces urethane and other foam products for general applications rather than the automotive-specific seat cushion foam molded to vehicle platform specifications here |
Geographic Concentration
Top states by share of national establishments.
| # | State | % Est. | Total Est. |
|---|---|---|---|
| 1 | Michigan | 17.3% | 73 |
| 2 | California | 10.2% | 43 |
| 3 | Ohio | 9.5% | 40 |
| 4 | Indiana | 6.9% | 29 |
| 5 | Tennessee | 5.9% | 25 |
| 6 | Texas | 5.7% | 24 |
| 7 | Alabama | 5.7% | 24 |
| 8 | Kentucky | 5.2% | 22 |
| 9 | Georgia | 3.3% | 14 |
| 10 | North Carolina | 3.1% | 13 |
% Of Establishments
0%
17%
Source: County Business Patterns, U.S. Census Bureau[3]
SBA Lending Summary
24
Total SBA Loans
$4.9M
Total Loan Volume
$204K
Average Loan Size
10 yrs
Average Loan Term
10.50%
Average Interest Rate
64
Jobs Supported
Source: SBA 7(a) Program Data, U.S. Small Business Administration — FY 2025[4]
Key Insight: The SBA[7] sets the size standard for NAICS 336360 at 1,000 employees. Firms below this threshold qualify for small business set-aside contracts and SBA-backed lending programs. Federal procurement includes replacement seats for military vehicle refurbishment, interior trim for government fleet vehicle upfit, and seating for military transport and command vehicles. The SBA's contracting programs[8] support manufacturers pursuing Army TACOM interior component and GSA fleet refurbishment contracts. Eligible businesses can access SBA 7(a) loans[9] for working capital, equipment, and acquisition financing, while 504 loans[10] support major fixed-asset purchases including real estate and heavy machinery.
Top SBA Lenders
| # | Lender | Loans | Volume | Avg Loan |
|---|---|---|---|---|
| 1 | Newtek Bank, National Association | 8 | $4.0M | $500K |
| 2 | Northeast Bank | 16 | $888K | $56K |
Frequently Asked Questions
Common questions about this industry.
What types of businesses are classified under NAICS 336360?
Manufacturers of motor vehicle seating and interior trim classify here. Products include complete seat assemblies, seat frames, foam cushions, headliners, door panels, carpet systems, consoles, and interior plastic trim per the Census Bureau[5] classification.
How is the vehicle seating and trim industry structured?
Roughly 715 businesses employ an estimated 87,400 workers per Census data[11]. Three global Tier 1 suppliers dominate OEM seat production: Lear, Adient, and Magna Seating operate just-in-sequence facilities near vehicle assembly plants. Smaller firms produce interior trim components and serve aftermarket and specialty vehicle markets.
What is the SBA size standard for NAICS 336360?
The SBA[7] sets the threshold at 1,000 employees. Businesses with fewer than 1,000 average employees qualify as small for federal contracting preferences and SBA-backed financing programs including 7(a) and 504 loans.
What NAICS codes are related to vehicle seating manufacturing?
Related codes include 336390 (Other Vehicle Parts), 336320 (Vehicle Electrical), 336310 (Engines), 337127 (Institutional Furniture), 336211 (Vehicle Bodies), and 326150 (Urethane Foam). Each covers either other automotive systems, furniture manufacturing, or upstream material production distinct from automotive interior assembly.
What industries interact with vehicle seating manufacturers?
Automobile assemblers, foam suppliers, fabric mills, leather processors, and heavy truck manufacturers interact most directly. Just-in-sequence delivery requirements make geographic proximity to vehicle assembly plants critical for seat suppliers operating on two-to-four-hour build-to-order delivery windows.
What activities are included in NAICS 336360?
Activities include stamping and welding seat frames, molding polyurethane foam cushions, cutting and sewing seat covers from leather, vinyl, and cloth, assembling complete seats with heating and power mechanisms, laminating headliner substrates, injection molding door trim panels and console components, and manufacturing automotive carpet systems with sound deadening layers.
Can vehicle seating manufacturers qualify for SBA loans?
Yes, firms below 1,000 employees qualify for SBA lending programs[8] including 7(a) and 504 loans. Seat frame welding robots, foam molding presses, automated sewing stations, and injection molding machines represent capital investments suited to SBA 504 equipment financing.
Where are vehicle seating and trim manufacturers concentrated?
Production concentrates in Michigan, Ohio, Indiana, Alabama, and Tennessee near vehicle assembly plants requiring just-in-sequence seat delivery. JIS seat plants typically locate within 30 miles of the assembly plant they supply. Interior trim component plants distribute more broadly across the Midwest and Southeast automotive corridor, with additional operations in states hosting transplant automaker assembly facilities.
Sources & References
Government datasets and editorial sources used in this report.
- [1]U.S. Bureau of Labor Statistics, Quarterly Census of Employment and Wages bls.gov
- [2]U.S. Census Bureau, Economic Census census.gov
- [3]U.S. Census Bureau, County Business Patterns census.gov
- [4]U.S. Small Business Administration, SBA 7(a) Loan Program Data data.sba.gov
- [5]U.S. Census Bureau census.gov
- [6]Bureau of Labor Statistics bls.gov
- [7]Small Business Administration sba.gov
- [8]SBA's contracting programs sba.gov
- [9]SBA 7(a) loans sba.gov
- [10]504 loans sba.gov
- [11]Census data naicslist.com
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