Vehicle accessory industry statistics span retail stores, aftermarket suppliers, vehicle use and accessory-adjacent household costs. In the United States, the 2023 automotive parts and accessories store category reported $84.377 billion in sales, shipments or revenue, while major retailers and suppliers reported billions more in company-level sales across broader product mixes.
Key Vehicle Accessory Industry Statistics
The most useful headline measures cover market activity, fleet demand, retailer scale and consumer costs:
- $84.377 billion in 2023 sales, shipments or revenue was reported by U.S. NAICS 441310 automotive parts and accessories employer firms.
- $12.520 billion in 2023 annual payroll was reported by U.S. NAICS 441310 automotive parts and accessories employer firms.
- 3,075,444 employees in 2023 were counted in the U.S. automotive parts and accessories store category.
- Approximately 3 trillion U.S. vehicle-miles per year is the annual travel estimate cited in O’Reilly’s 2024 filing.
- 284 million U.S. light vehicles at the end of 2023 formed the light-vehicle fleet cited by O’Reilly.
- 12.5 years was the average U.S. vehicle age in 2023, up from 11.3 years in 2013.
- 16.8 million vehicles was the approximate 2024 U.S. light-vehicle sales seasonally adjusted annual rate.
- 6,432 U.S. stores at August 31, 2024 were operated by AutoZone.
- 7,353 locations at fiscal 2024 year end made up AutoZone’s global store network.
- $18.5 billion in fiscal 2024 net sales was reported by AutoZone, up 5.9% from fiscal 2023.
- $16.71 billion in 2024 sales was reported by O’Reilly, up 6% from 2023.
- 2.9% U.S. comparable-store sales growth in 2024 was reported by O’Reilly for stores open at least one year.
- $8.55 billion, or 51.2% of sales, in 2024 gross profit was reported by O’Reilly.
- 86% of AutoZone’s fiscal 2024 sales came from failure and maintenance categories.
- 28.4% of Standard Motor Products’ 2024 consolidated net sales came from O’Reilly Auto Parts.
- $975 in mean annual maintenance and repairs spending in 2023 was reported for the first listed consumer-unit group in the BLS military-status table.
Contents
- Key Vehicle Accessory Industry Statistics
- U.S. Vehicle Accessory Industry Market Scale and Business Activity
- Vehicle Fleet, Mileage and Replacement-Demand Trends
- AutoZone Vehicle Accessory Retail Statistics
- O’Reilly Aftermarket Sales and Margin Data
- Vehicle Accessory Categories and Customer Concentration
- Consumer Vehicle Spending and Accessory-Adjacent Costs
U.S. Vehicle Accessory Industry Market Scale and Business Activity
The closest official broad measure is the U.S. Census Bureau’s NAICS 441310 category, “automotive parts and accessories stores.” It covers employer firms in the store category, not every manufacturer, installer, online seller or nonemployer business.
| Measure | 2023 result | Population and unit |
|---|---|---|
| Sales, shipments or revenue | $84,377,099,000 | U.S. NAICS 441310 employer firms |
| Annual payroll | $12,520,337,000 | U.S. NAICS 441310 employer firms |
| Employees | 3,075,444 | U.S. NAICS 441310 employer firms |
These Census figures describe store-category operating activity rather than accessory-only wages or sales. They are therefore useful for industry scale, but they should not be treated as a complete valuation of the entire vehicle-accessory ecosystem.
Company filings show how broad aftermarket businesses sit inside that scale. AutoZone reported $18.5 billion in fiscal 2024 net sales, up 5.9% from fiscal 2023, together with $3.8 billion in operating profit, up 9.1%, and $2.7 billion in net income, up 5.3%.
AutoZone’s figures include replacement parts, maintenance items, accessories and non-automotive products. Standard Motor Products reported $1.463849 billion in 2024 net sales across its disclosed product groups, compared with $1.358272 billion in 2023 and $1.371815 billion in 2022; that series combines aftermarket and engineered solutions.
Source: AutoZone, Inc. Form 10-K for fiscal year ended August 31, 2024; Standard Motor Products, Inc. 2024 Form 10-K.
Vehicle Fleet, Mileage and Replacement-Demand Trends
Vehicle use and fleet age provide demand context for parts and accessories, but neither measure direct accessory adoption. O’Reilly’s 2024 filing cites approximately 3 trillion U.S. vehicle-miles per year as an industry-scale estimate.
| Demand-context measure | Period | Result |
|---|---|---|
| Total U.S. vehicle miles traveled | 2022 | +0.9% |
| Total U.S. vehicle miles traveled | 2023 | +2.1% |
| U.S. vehicle miles traveled | January–November 2024 | +1.0% |
| U.S. light-vehicle fleet | End of 2023 | 284 million |
| Registered vehicles | 2013–2023 | +14.2% |
The travel figures are based on U.S. Department of Transportation data cited by O’Reilly and are not accessory-sales measures. The November 2024 figure is partial-year, while the 2024 light-vehicle sales measure is an approximate seasonally adjusted annual rate of 16.8 million vehicles, not an exact single-month or necessarily final calendar-year total.
The replacement environment also reflects vehicle longevity. U.S. vehicle scrappage rates ranged from 4.1% to 5.7% annually from 2013 through 2023, while average vehicle age rose 10.6%, from 11.3 years in 2013 to 12.5 years in 2023.
Source: O’Reilly Automotive, Inc. Form 10-K for year ended December 31, 2024.
AutoZone Vehicle Accessory Retail Statistics
AutoZone’s fiscal year ended August 31, 2024, provides a detailed view of one large retailer’s physical footprint and operating capacity. The company operated 6,432 U.S. stores, 794 stores in Mexico and 127 stores in Brazil, for a global network of 7,353 locations at fiscal year end.
- AutoZone added 213 net stores in fiscal 2024, reflecting 217 openings and 4 closures.
- The company had 5,898 domestic commercial sales programs at fiscal 2024 year end, up from 5,007 in fiscal 2020.
- Average store inventory was $837,000 in fiscal 2024, compared with $683,000 in fiscal 2020.
- Total store square footage was 49.417 million square feet in fiscal 2024.
- Average store size was 6,721 square feet in fiscal 2024.
A commercial sales program is not a count of unique customers or sales volume, and inventory and square-footage measures include the company’s broad assortment. The network statistics consequently describe AutoZone’s retail infrastructure, not an industry-wide store-growth rate or accessory-only inventory.
Source: AutoZone, Inc. Form 10-K for fiscal year ended August 31, 2024.
O’Reilly Aftermarket Sales and Margin Data
O’Reilly’s calendar 2024 results combine parts, maintenance items, accessories, equipment and related products. Sales reached $16.71 billion, up 6% from $15.81 billion in 2023, while comparable-store sales increased 2.9% in 2024 and 7.9% in 2023.
| O’Reilly measure | 2024 result | Definition or scope |
|---|---|---|
| Sales | $16.71 billion | Consolidated operations |
| Comparable-store sales | +2.9% | U.S. stores open at least one year |
| Gross profit | $8.55 billion; 51.2% | Consolidated operations |
| SG&A expense | $5.30 billion; 31.7% | Consolidated operations |
| Operating income | $3.25 billion; 19.5% | Consolidated operations |
| Net income | $2.39 billion; 14.3% | Consolidated operations |
The comparable-store definition excludes specialty machinery, independent-parts-store sales, employee sales and the 2024 leap day, while including online sales. O’Reilly opened 198 net new stores in 2024 and began operating 23 Canadian stores through the Vast Auto acquisition; the 23-store addition was acquisition-based rather than organic openings.
Source: O’Reilly Automotive, Inc. Form 10-K for year ended December 31, 2024.
Vehicle Accessory Categories and Customer Concentration
Product-category figures show why company revenue should not be read as accessory-only demand. AutoZone reported that failure and maintenance categories represented approximately 86% of fiscal 2024 sales, with the remaining mix including discretionary and other categories; the filing does not identify accessories alone.
Standard Motor Products’ 2024 disclosed categories were broader than consumer accessories:
| Product group | 2024 sales |
|---|---|
| Engine Management | $467.460 million |
| Electrical and Safety | $229.361 million |
| Wire Sets and Other | $65.739 million |
| AC System Components | $274.926 million |
| Commercial Vehicle engineered solutions | $89.171 million |
| Light Vehicle engineered solutions | $91.548 million |
The supplier’s customer base was concentrated. O’Reilly Auto Parts represented 28.4% of Standard Motor Products’ 2024 consolidated net sales, AutoZone represented 18.8% and NAPA represented 13.5%; the three largest individual customers together represented approximately 60.7%.
Those percentages measure supplier customer concentration, not O’Reilly, AutoZone or NAPA market share. Engineered-solutions sales serve vehicle and equipment manufacturers and should not be relabeled as consumer accessory purchases.
Source: AutoZone, Inc. Form 10-K for fiscal year ended August 31, 2024; Standard Motor Products, Inc. 2024 Form 10-K.
Consumer Vehicle Spending and Accessory-Adjacent Costs
The Bureau of Labor Statistics provides a consumer-spending lens, but its 2023 table is stratified by military status. The figures below retain the source’s first and second listed consumer-unit groups rather than presenting either column as a national all-consumer-unit average.
| BLS 2023 measure | First listed consumer-unit group | Second listed consumer-unit group |
|---|---|---|
| Other vehicle expenses | $3,845 | $4,146 |
| Vehicle finance charges | $361 | Not reported in supplied figure |
| Maintenance and repairs | $975 | $1,127 |
| Vehicle rental, leases, licenses and other charges | $734 | Not reported in supplied figure |
| Vehicle insurance | $1,775 | $1,937 |
The table’s categories are broader than accessory purchases. In particular, maintenance and repairs, insurance, finance charges and licensing cannot be converted into accessory spending without additional evidence.
The first listed consumer-unit group recorded $975 in mean annual maintenance and repairs spending in 2023, while the second listed group recorded $1,127. Other vehicle expenses were $3,845 and $4,146 respectively, and vehicle insurance was $1,775 and $1,937.