Auto Parts Manufacturers NAICS 3363
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Industry Summary
The 3,616 auto parts manufacturers in the US produce components, modules, and systems for auto manufacturers (also known as original equipment manufacturers or OEMs), other parts suppliers, and the aftermarket. About 70% of automotive parts are for OEMs, while 30% are destined for the repair/modification market (aftermarket).
Dependence on Auto Industry
The auto manufacturing industry is global and dominated by a few large companies.
Vulnerability to Commodity Prices
Auto parts manufacturers are vulnerable to variability in costs of raw materials, particularly steel, oil, copper, resins, and rubber.
Recent Developments
Jan 12, 2026 - Bosch Sees Combustion and Hybrid Engines Driving US Auto Sales Through 2035
- Bosch, the world’s largest auto parts supplier, said it expects most vehicles sold in the US by 2035 will still rely on internal combustion engines, primarily through hybrid and range-extended powertrains rather than fully electric vehicles. Pure EVs are projected to account for only about 30% of sales, Bosch told the annual CES conference. For the auto parts manufacturing industry, this outlook signals continued demand for traditional engine, fuel system, transmission, and emissions components, alongside growing (but not dominant) EV and battery-related parts. Suppliers heavily invested in combustion engines and hybrid technologies may see a longer runway for existing product lines, while EV-only suppliers face a more gradual ramp-up. Distribution networks are also likely to remain complex, as warehouses, dealers, and service channels must support both legacy combustion parts and newer electrified components. The slower EV transition reflects regulatory uncertainty, shifting incentives, and cautious consumer adoption.
- Major US and global automakers - including General Motors, Ford, Toyota, Volkswagen, Hyundai, and Stellantis - warned lawmakers that expanding Chinese auto and battery producers pose a “clear and present threat” to the US auto industry. They collectively urged restrictions on Chinese plants and maintaining bans on certain technology imports. Tariffs on Chinese vehicles and components have also added supply-chain pressures, raising costs for US manufacturers and suppliers. For the auto parts industry, this intensifying competition and political pressure could accelerate supply‑chain shifts. Chinese vehicles are increasingly competitive globally, driven by subsidies and integrated supply networks that include parts and batteries. American suppliers may face reduced demand if Chinese EVs and vehicles enter US markets at lower costs, potentially squeezing margins for domestic parts makers. Automakers are pushing hard to “de-risk” reliance on Chinese components, encouraging suppliers to relocate production, reshuffling supply chains, raising short-term costs, and prompting more regional sourcing strategies.
- Auto collision trends in 2025 are reshaping demand, product mix, and pricing dynamics for auto parts makers, according to CCC Intelligent Solutions. As high vehicle prices and interest rates keep consumers in older vehicles longer, the US car parc is becoming more diverse, sustaining demand for replacement parts across a wider range of makes, models, and model years. At the same time, growing penetration of advanced driver-assistance programs, electrified powertrains, and embedded electronics is increasing the technical complexity and value of parts required in collision repairs. Diagnostics, scans, and calibrations (now present in nearly 70% of appraisals, per CCC) underscore the expanding role of sensor-dependent components. Tariffs, logistics disruptions, and supply chain instability continue to drive parts price volatility, creating both margin pressure and pricing opportunity. For manufacturers, these trends favor investments in advanced components, data integration, and resilient supply chains to meet evolving repair requirements.
- The Automotive Service Association is urging auto repair shops to support the Preventing Auto Recycling Theft Act (PART) as catalytic converter thefts in the US continue to rise. A catalytic converter is a key part of a vehicle’s exhaust system that reduces harmful emissions by converting carbon monoxide, nitrogen oxides, and hydrocarbons into less harmful gases. These components are targeted by thieves because they contain valuable metals like platinum, palladium, and rhodium, which can be sold quickly for significant profit. The thefts have placed a heavy burden on repair shops, forcing them to manage costly replacements, increased labor, insurance claims, and frustrated vehicle owners. The PART Act proposes VIN stamping on new converters, grants for marking used converters, stricter record-keeping for buyers, and federal penalties for theft and resale, aiming to protect repair shops and reduce losses in the auto repair industry.
Industry Revenue
Auto Parts Manufacturers
Industry Structure
Industry size & Structure
The average auto parts manufacturer employs 153 workers and generates $76 million in annual revenue.
- The auto parts manufacturing industry consists of about 3,616 companies that employ 553,300 workers and generate $276.5 billion annually.
- The five major component systems in an average internal combustion engine car include the body exterior (25% of total costs), interior (24%), electronics and electrical (18%), powertrain (18%), and chassis (15%), according to Munro & Associates.
- Large companies include Adient, BorgWarner, and Lear.
Industry Forecast
Industry Forecast
Auto Parts Manufacturers Industry Growth
Source: Vertical IQ and Inforum
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