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).
Vulnerability to Commodity Prices
Auto parts manufacturers are vulnerable to variability in costs of raw materials, particularly steel, oil, copper, resins, and rubber.
Dependence on Auto Industry
The auto manufacturing industry is global and dominated by a few large companies.
Recent Developments
May 29, 2025 - Americans Keeping Current Cars Longer
- High new car prices and tariffs on foreign automobiles and auto parts are causing consumers to increasingly drive their current cars longer. According to S&P Global, the last two years have seen a steady increase in vehicle age, with Americans keeping their cars for 12.8 years on average. Scrappage rates - the percentage of vehicles removed from operation - have held steady despite new vehicle registrations topping 16 million in 2024. Both statistics indicate an aging American fleet on the roads, which is good for auto repair shops and parts manufacturers, but bad news for manufacturers and dealerships. Maintenance demands are expected to soar in the coming years if the trend holds and prices continue to rise. Online automotive resource Edmunds says the average price of a new car is about $47,000, yet almost half of new car buyers want to spend $35,000 or less for a vehicle.
- After the Trump administration’s 25% tariff on imported auto parts went into effect in late April, the government altered the levies to soften price shock and give the industry more time to adjust. The new auto part tariffs offer a partial reimbursement to manufacturers during the next two years if the final assembly of an automobile is in the US, regardless of the parts’ origin. The rebate will be 3.5% relative to the sales price for domestically assembled vehicles for the first year, and then fall to 2.5% for the second year. It also prevents secondary tariffs on other products, like aluminum and steel, from stacking up on an automaker. Despite this, automobile cost hikes will still be significant due to the tariffs, anywhere from $2,000 for the least impacted cars up to $15,000 for the most, according to an Anderson Economic Group analysis.
- Struggling retailer Advanced Auto Parts is aggressively moving on a corporate restructuring in early 2025 to turn around years of floundering sales and ranking fourth among its competitors. Its closing of 700 corporate-owned and independent stores represents 10% of corporate locations and 20% of indies. It is also closing four distribution centers and simplifying its supply chain from big distribution hubs to smaller regional hubs in order to get the vast amount of parts the company must carry to customers as quickly as possible. With recession worries looming, auto parts retailers typically benefit from consumers putting off new car purchases in favor of repairing a current vehicle. But the ping-ponging tariff war between the US and its North American neighbors is a wild card that could increase costs and blunt any gain to be had in the auto parts industry.
- Employment by auto parts manufacturers fell 1.9% in November 2024 year over year while labor costs increased, according to the US Bureau of Labor Statistics (BLS). Average wages for nonsupervisory employees at auto parts manufacturers were up 12% in November 2024 year over year, reaching $30.07 per hour. The Producer Price Index for auto parts ticked up a slight 0.7% in December 2024 compared to a year ago. That number will skyrocket in 2025 if the Trump administration follows through on 25% tariffs on Mexican and Canadian imports. There is no such thing as an automobile fully made in the US. Virtually all cars contain parts from Mexico and Canada, and billions of dollars worth of auto merchandise crosses North American borders every year. Industry analysts expect tariffs to increase a car’s price by an average of $3,000.
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.
- Breakeven production for auto parts manufacturers is estimated to be between 13.5 million and 15 million units, according to the Original Equipment Suppliers Association.
- 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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