NAICS 336330 Quarterly Industry Report
Motor Vehicle Steering and Suspension Components (except Spring) Manuf
Comprehensive industry research for valuation professionals, business owners, buyers, and lenders
NAICS Code: 336330Sector: 33Updated: Q1 2026
About This Report
This Fair Market Value industry report for NAICS 336330 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 steering and suspension component manufacturing. Reports are updated quarterly to reflect new Census releases and regulatory changes.
Industry Snapshot
Key metrics for the motor vehicle steering and suspension components (except spring) manuf industry.
Industry Definition & Overview
Motor Vehicle Steering and Suspension Component Manufacturing (NAICS 336330) encompasses establishments primarily engaged in manufacturing and rebuilding motor vehicle steering and suspension parts. Products include power steering pumps, rack and pinion steering assemblies, electric power steering (EPS) systems, tie rod assemblies, ball joints, control arms, coil springs, leaf springs, shock absorbers, strut assemblies, stabilizer bars, and steering columns. The U.S. Census Bureau[5] classifies this industry under motor vehicle parts manufacturing.
Roughly 296 active businesses employ an estimated 28,100 workers in this industry. OEM production dominates output, with Tier 1 suppliers delivering complete steering and suspension modules to vehicle assembly plants. Electric power steering has largely replaced hydraulic systems on passenger vehicles, shifting manufacturing requirements from hydraulic pump and hose assembly toward electric motor, torque sensor, and electronic control unit production. Independent aftermarket parts manufacturers supply replacement components through traditional distribution channels serving repair shops.
Manufacturing processes include forging and machining of steering knuckles, ball studs, and tie rod ends; coil spring winding and heat treatment; leaf spring forming and shot peening; shock absorber tube swaging, piston rod chrome plating, and valve assembly; and complete steering rack assembly including housing machining, gear cutting, and hydraulic or electric assist integration. Lightweighting initiatives drive increased use of aluminum forgings and hollow stabilizer bars to reduce unsprung mass. Quality requirements follow IATF 16949 standards for OEM supply, with critical safety components subject to FMVSS compliance testing for steering integrity and vehicle stability under emergency handling conditions.
What's Included in This Industry
- Power steering system manufacturing
- Rack and pinion steering assembly production
- Electric power steering system manufacturing
- Shock absorber and strut assembly production
- Coil spring and leaf spring manufacturing
- Ball joint and tie rod end production
- Control arm and suspension link manufacturing
- Steering column and coupling production
- Stabilizer bar manufacturing
- Steering knuckle forging and machining
NAICS Classification Hierarchy
| Level | Description | Code |
|---|---|---|
| Subsector | Transportation Equipment Manufacturing | 336 |
| Industry Group | Motor Vehicle Parts Manufacturing | 3363 |
| NAICS Industry | Motor Vehicle Steering and Suspension Components (except Spring) Manufacturing | 33633 |
| National Industry | Motor Vehicle Steering and Suspension Components (except Spring) Manufacturing | 336330 |
Related NAICS Codes
| Code | Description | Relationship |
|---|---|---|
| 336340 | Motor Vehicle Brake System Manufacturing | Manufactures motor vehicle brake systems classified separately from the steering and suspension components produced here, though both are critical vehicle safety systems |
| 336350 | Motor Vehicle Transmission and Power Train Parts Manufacturing | Produces motor vehicle transmission and drive train components rather than the chassis-side steering and suspension parts manufactured in this classification |
| 336310 | Motor Vehicle Gasoline Engine and Engine Parts Manufacturing | Manufactures gasoline engines and engine parts rather than the undercarriage steering gear and suspension components produced in this dedicated parts category |
| 336390 | Other Motor Vehicle Parts Manufacturing | Produces other motor vehicle parts including stamped metal components and hardware rather than the specific steering and suspension assemblies manufactured here |
| 336320 | Motor Vehicle Electrical and Electronic Equipment Manufacturing | Manufactures motor vehicle electrical equipment including the electronic sensors and control modules that integrate with electric power steering systems produced in this industry |
| 332111 | Iron and Steel Forging | Produces iron and steel forgings used in steering knuckles and ball joints but classifies under general forging rather than the finished automotive steering components manufactured here |
Geographic Concentration
Top states by share of national establishments.
| # | State | % Est. | Total Est. |
|---|---|---|---|
| 1 | California | 17.7% | 45 |
| 2 | Michigan | 11.4% | 29 |
| 3 | Tennessee | 7.5% | 19 |
| 4 | Ohio | 7.5% | 19 |
| 5 | Pennsylvania | 5.1% | 13 |
| 6 | Indiana | 5.1% | 13 |
| 7 | Kentucky | 5.1% | 13 |
| 8 | Florida | 4.7% | 12 |
| 9 | Missouri | 3.9% | 10 |
| 10 | Texas | 3.5% | 9 |
% Of Establishments
0%
18%
Source: County Business Patterns, U.S. Census Bureau[3]
SBA Lending Summary
8
Total SBA Loans
$1.1M
Total Loan Volume
$138K
Average Loan Size
10 yrs
Average Loan Term
12.25%
Average Interest Rate
24
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 336330 at 750 employees. Firms below this threshold qualify for small business set-aside contracts and SBA-backed lending programs. Federal procurement includes steering and suspension components for military vehicle maintenance, replacement parts for government fleet vehicles, and suspension upgrades for armored vehicle programs. The SBA's contracting programs[8] support manufacturers pursuing Defense Logistics Agency spare parts and Army TACOM vehicle component 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 | BayFirst National Bank | 8 | $1.1M | $138K |
Frequently Asked Questions
Common questions about this industry.
What types of businesses are classified under NAICS 336330?
Manufacturers of motor vehicle steering and suspension parts classify here. Products include power steering systems, rack and pinion assemblies, shock absorbers, struts, springs, ball joints, tie rods, control arms, and stabilizer bars per the Census Bureau[5] classification.
How is the steering and suspension manufacturing industry structured?
Roughly 296 businesses employ an estimated 28,100 workers per Census data[11]. Global Tier 1 suppliers control OEM module supply to vehicle assembly plants while independent manufacturers produce replacement parts for the automotive aftermarket distributed through traditional wholesale channels.
What is the SBA size standard for NAICS 336330?
The SBA[7] sets the threshold at 750 employees. Businesses with fewer than 750 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 steering and suspension manufacturing?
Related codes include 336340 (Brake Systems), 336350 (Transmissions), 336310 (Engines), 336390 (Other Vehicle Parts), 336320 (Vehicle Electrical), and 332111 (Iron Forgings). Each covers other automotive component categories or upstream forging operations distinct from finished steering and suspension assembly.
What industries purchase steering and suspension components?
Automobile assemblers, parts wholesalers, repair shops, forging suppliers, and heavy truck manufacturers interact most directly. OEM supply to vehicle assembly plants generates the largest revenue while aftermarket replacement parts sold through wholesale distribution sustain independent component manufacturers.
What activities are included in NAICS 336330?
Activities include manufacturing rack and pinion steering assemblies, producing electric power steering systems with integrated motor and torque sensor, winding and heat treating coil springs, forging and machining ball joints and tie rod ends, assembling shock absorbers and strut cartridges, manufacturing stabilizer bars and control arms, and rebuilding steering gears and suspension components.
Can steering and suspension manufacturers qualify for SBA loans?
Yes, firms below 750 employees qualify for SBA lending programs[8] including 7(a) and 504 loans. Spring coiling machines, chrome plating lines, CNC machining centers, and forging press equipment represent capital investments suited to SBA 504 equipment financing.
Where are steering and suspension manufacturers concentrated?
Production concentrates in the Midwest automotive corridor including Michigan, Ohio, Indiana, and Illinois near vehicle assembly plants and forging suppliers. Southern states including Tennessee, Alabama, and South Carolina host plants built by foreign-owned Tier 1 suppliers near transplant automaker assembly facilities. Aftermarket manufacturers distribute across states with large vehicle populations including Texas and California.
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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