O’Reilly and AutoZone are both big auto parts chains. Compare prices, stock, and service for your part, since both are good options.
Both are national chains
Each has thousands of US stores.
O’Reilly
- Strong professional parts counter service.
- Wide inventory for commercial customers.
AutoZone
- Loan a tool program.
- Free battery testing.
- Duralast brand.
Compare
Prices vary by part. Check each site for stock.
Online
Both offer in-store pickup.
Tip
Use coupon codes.
Chain profiles
O’Reilly Auto Parts operates over 6,300 stores in the US, Mexico and Canada, and AutoZone has about 7,000 stores in the US, plus Mexico and Brazil, based on company reports. Both sell parts, batteries, tools and fluids, offer free battery testing, and loan tools.
- AutoZone offers a free Loan-A-Tool program and has a Duralast brand. O’Reilly has a strong commercial and professional customer base, with a large share of sales to mechanics.
- Both offer rewards programs and online ordering with in-store pickup.
- Prices are similar, so compare specific parts, warranties and coupon codes.
Tips
Use the vehicle lookup on each website to confirm fitment. Ask about core charges on parts like alternators. O’Reilly stores often carry deeper stock in hard-to-find parts for professionals. AutoZone’s app has strong DIY guides. Check local reviews for service, since quality varies by store. NAPA and Advance Auto Parts are other options.
Chain profiles
O’Reilly Auto Parts has about 6,000 stores and AutoZone about 7,000 in the US. AutoZone has loaner tools and a Duralast brand. O’Reilly has professional parts focus. Prices and availability vary.
Tips
Compare prices online, check store stock and warranties.
Store comparison
O’Reilly Auto Parts operates more than 6,000 stores in the US and has a dual market approach, serving both do it yourself customers and professional mechanics. AutoZone has over 6,500 US stores and also operates in Mexico and Brazil, and is known for free battery testing and a loan a tool program.
Which to choose
Both stock parts for most vehicles, with similar prices, and offer rewards programs. AutoZone offers a lifetime warranty on many parts and free services like check engine code reading. O’Reilly has a strong commercial network, which can mean wider availability of parts. Compare prices on your part, ask about store pickup and warranty, and check ratings. Parts quality ranges from budget to premium lines in both. Rock-bottom prices exist online at RockAuto.
Based on data from company annual reports and consumer surveys
