Navigating the world of auto parts can be overwhelming, whether you’re a seasoned mechanic or a first-time car owner. Our shopping guide to the largest auto parts retailers spotlights trusted names offering vast selections, competitive prices, and convenient shopping options. Discover where to find the parts you need with confidence—saving you time, money, and hassle on your next automotive project.
Comparing the Largest Auto Parts Retailers in the U.S.
When shopping for auto parts, it’s crucial to understand the landscape of the largest auto parts retailers. Each major retailer has unique characteristics in terms of number of locations, revenue, regional presence, and specialties. The table below helps you quickly compare the key players:
| Retailer Name | Number of Locations (2025) | Estimated Annual Revenue | Main Geographic Strength | Specialty | Service Model |
|---|---|---|---|---|---|
| AutoZone | 6,529 | $18B | Nationwide, especially Texas | Aftermarket auto parts | Retail/DIFM/DIY |
| O’Reilly Auto Parts | 6,307 | $17B | Nationwide, strong Texas presence | Aftermarket auto parts | Retail/DIFM/DIY |
| NAPA Auto Parts | 5,612 | $13B | Nationwide, large in California | Branded, professional use | Retail/Wholesale |
| Advance Auto Parts | 4,333 | $9B | Nationwide, focus in Florida | Aftermarket auto parts | Retail/DIFM/DIY |
| Pep Boys | ~1,000 | $2.7B | Mainly Eastern U.S. | Parts & auto services | Retail/Service Bays |
| Discount Tire | 1,113 | $7B | Nationwide, Western U.S. | Tires & wheels | Retail/Install |
| LKQ Corporation | 280+ (U.S. retail) | $10B (global) | North America, Europe | Recycled/OEM parts | Wholesale/Retail |
| Genuine Parts Co. | NAPA, 5,600+ (owned) | $12B (U.S.) | Nationwide | Branded, large network | Wholesale/Retail |
| Carquest (part of Advance) | 1,300+ | N/A | Nationwide | Aftermarket auto parts | Retail/Wholesale |
Types of Auto Parts Retailers and Their Attributes
| Retailer Type | Suited For | DIY Support | In-House Install | Parts Offered | Online Ordering | Rewards Program |
|---|---|---|---|---|---|---|
| National Chain (AutoZone, O’Reilly, Advance) | Personal & Commercial | High | Limited to None | Extensive | Yes | Yes |
| Specialty Tire (Discount Tire) | All drivers | Low | Yes | Tires & Wheels | Yes | Yes |
| Full Service (Pep Boys) | Car owners needing repair | Medium | Yes (full bays) | Parts & Repair | Yes | Yes |
| Wholesale/Hybrid (LKQ, NAPA, Carquest) | Shops & DIYers | Medium | Limited (NAPA Car Care Centers) | OEM, aftermarket, recycled | Yes | Yes (varies) |
Shopping Guide to the Largest Auto Parts Retailers for Personal Car Use
Compatibility: Find the Right Parts for Your Vehicle
-
Know Your Vehicle Details
Always start with your vehicle’s make, model, year, and engine type. Different stores’ systems let you search by car details to find exact-fit parts. Having your VIN handy ensures compatibility. -
Choose Retailers with Strong Compatibility Tools
The biggest retailers like AutoZone, O’Reilly, Advance, and NAPA invest heavily in inventory systems. These let you match parts to your specific vehicle, reducing errors. -
OEM (Original Equipment Manufacturer) vs. Aftermarket
- O’Reilly, AutoZone, and Advance Auto Parts primarily offer aftermarket, good for most repairs and cost savings.
- NAPA, Carquest, and LKQ include OEM and remanufactured options, best for those seeking factory-quality.
-
For hard-to-find or specialty items, LKQ provides used/recycled/OEM components.
-
Specialty Needs
For tires and wheels, Discount Tire is the dedicated leader in this segment. For quick installations on-site, seek retailers that also offer service bays (like Pep Boys).
Function: Parts Selection and In-Store Experience
- Critical Parts: Items vital for your car’s operation (batteries, pumps, belts, etc.) are always stocked in major chains.
- Maintenance Supplies: Fluids, filters, bulbs, and wipers are reliably in stock.
- Performance/Customization: Some retailers (especially NAPA and O’Reilly) have strong lines of performance and specialty parts for enthusiasts.
- Service Options: Pep Boys provides both parts sales and installation/repair, while Discount Tire specializes in tire and wheel installation.
Tip: If your repair can’t wait, check retailers with guaranteed “Buy Online, Pickup In Store” and local delivery options.
Installation Tips: DIY or Professional Help?
DIY Installation
- Support for DIYers: All major auto parts retailers cater to the do-it-yourselfer. Expect free tool loans (AutoZone, O’Reilly), engine code checks, and basic support.
- Instructions: Look for stores that provide step-by-step installation guides (in print or online). YouTube channels are often supported by these retailers.
- Service Kiosks: Pep Boys and some NAPA locations have installation bays for brakes, batteries, or wipers—an asset for those who want pro help.
Choosing Installation Services
- Brakes, Batteries, and Wipers: Most chains can install these for you, either at parts counters or service bays.
- Tires: Discount Tire leads for tire install speed, quality, and price.
- Advanced Repairs: For engine or electronic work, use NAPA’s network of certified repair shops or Pep Boys’ full garages.
Tip: Always compare installation fees and warranty terms between stores before deciding.
Maintenance Advice: Maximizing Value from Your Purchases
-
Stick to Maintenance Schedules
Use retailer-provided online schedulers and email reminders to stay ahead of oil, brake, and filter changes. -
Rewards Programs Pay Off
Enroll in store loyalty programs for discounts on regular purchases, bonus coupons, and occasional free services (battery check, wiper install). -
Keep Records
Track what parts you’ve purchased and when you installed them. Most large retailers offer email receipts and purchase histories connected to your account. -
Warranties and Returns
- National chains typically offer generous return policies, often with lifetime warranties on select parts (like alternators and starters).
-
OEM and remanufactured parts may have different warranty terms, so always check.
-
Stay Alert for Recalls
Register your part purchases with the retailer or manufacturer to receive any recall or safety notifications.
Practical Tips and Best Practices When Choosing & Using Large Auto Parts Retailers
1. Prioritize Retailers with Extensive Location Networks
- National coverage ensures replacement parts and warranty service are available if you travel or move.
- For urgent repairs, wide store networks increase the likelihood of finding parts in stock nearby.
2. Compare Online Ordering and Pickup/Delivery Options
- Many major stores now offer same-day delivery for common parts.
- “Buy Online, Pick Up In Store” is a huge convenience for DIY projects.
3. Use Store Staff Expertise
- Staff at O’Reilly, AutoZone, and Advance Auto Parts are trained for both DIYers and professionals.
- Don’t hesitate to ask for part advice, installation tips, or tool borrow programs.
4. Evaluate Rewards and Loyalty Programs
- Regular buyers (for DIY maintenance or multiple vehicles) get significant benefits from loyalty accounts.
- Look for points on purchases, member discounts, or even free roadside services.
5. Check Return Policies and Core Charges
- Especially for batteries, alternators, and other “core” components, ensure you understand the return/core refund process.
- Hold onto your receipts; many returns require proof of purchase.
6. Consider Store Specializations
- Tire needs? Discount Tire.
- Complete auto service? Pep Boys.
- Professional-grade and OEM? NAPA/Carquest.
7. Investigate Parts Availability and Warranty Coverage
- The largest stores carry millions of SKUs, but not every location stocks every part.
- Use online inventory checkers before visiting, especially for less common models.
8. Account for Regional Reach and Store Hours
- Texas, California, and Florida have the highest density of stores.
- Mega cities like Houston, San Antonio, and Columbus may offer extended hours or specialty locations.
Key Attributes Comparison Table: Largest U.S. Auto Parts Retailers
Below is a quick reference to compare some of the most important technical and operational features:
| Feature / Attribute | AutoZone | O’Reilly Auto Parts | NAPA Auto Parts | Advance Auto Parts | Pep Boys | Discount Tire | LKQ |
|---|---|---|---|---|---|---|---|
| DIY Tool Loan | Yes | Yes | Some | Yes | Some | No | No |
| Online Inventory Checker | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| In-Store Pickup | Yes | Yes | Yes | Yes | Yes | Yes | Varies |
| In-House Installation | Limited | Limited | Some (Car Care) | Limited | Extensive | Yes (Tires) | No |
| OEM Parts Availability | Limited | Limited | Strong | Limited | Limited | N/A | Yes |
| Commercial Account Support | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Nationwide Store Count | 6,529 | 6,307 | 5,612 | 4,333 | ~1,000 | 1,113 | ~280 retail |
| Loyalty Program | Yes | Yes | Yes | Yes | Yes | Yes | Varies |
| Warranty Coverage | Good | Excellent | Very Good | Good | Good | N/A | Varies |
| Delivery Services | Yes | Yes | Yes | Yes | Yes | Yes | Varies |
Related Video
Conclusion
Shopping for auto parts is now easier and more convenient than ever, thanks to the expansion and innovation of America’s largest auto parts retailers. From finding compatible, quality parts for your car to leveraging rewards, in-store services, and expert advice, these retailers offer solutions for nearly all personal car repair and maintenance needs. By understanding the differences in coverage, specialization, and customer service among the leading chains, you can make sure your choice delivers value, reliability, and convenience tailored to the way you drive and maintain your car.
FAQ: Frequently Asked Questions About the Largest Auto Parts Retailers
-
Which auto parts retailer has the most locations in the U.S.?
AutoZone currently holds the leading spot for the most auto parts retail locations across the country, followed closely by O’Reilly Auto Parts. -
What’s the biggest difference between AutoZone, O’Reilly, and NAPA Auto Parts?
AutoZone and O’Reilly focus on aftermarket parts for both DIYers and professionals. NAPA specializes in both aftermarket and OEM parts with a stronger orientation toward professional and commercial mechanics. -
Can I order online and pick up in-store with all the big retailers?
Yes, all major chains offer “Buy Online, Pick Up In Store” services, often with same-day pickup for in-stock parts. -
What auto parts stores provide installation services?
Pep Boys offers full repair and maintenance services. Discount Tire is dedicated to tire installation. Some NAPA locations have “NAPA Car Care Centers” for pro installs. -
Are warranties the same at all large auto parts retailers?
Warranty coverage varies by part and retailer. Most chains offer lifetime warranties on critical parts (like starters and alternators), but it’s best to check the specific policy at purchase. -
Can I earn rewards or discounts as a frequent shopper?
Most national chains offer rewards or loyalty programs. You can earn points on purchases, receive special discounts, and even get reminders for upcoming maintenance needs. -
Are OEM (Original Equipment Manufacturer) parts always better than aftermarket parts?
OEM parts match what originally came on your vehicle. Aftermarket parts are often less expensive, widely available, and of equal quality for most maintenance tasks. -
How do I make sure the part I buy is compatible with my vehicle?
Use the retailer’s in-store systems or online tools. Enter your vehicle’s year, make, model, engine type, and even VIN to match parts with your specific car. -
Which retailer should I use for quick tire replacement?
Discount Tire specializes in tire and wheel sales and installation, offering fast turnaround and a wide selection. -
What should I do if a part fails after installation?
Keep your receipt and check warranty terms. Contact the retailer promptly—major chains are known for customer-oriented return and exchange policies, especially on warrantied items.