5 Things to Check Before Buying Used Auto Parts!

03 January 2025

Buying used auto parts can be a smart move. Whether you’re repairing your own vehicle, running an auto repair shop, or maintaining a fleet, used parts offer a cost-effective solution. But not all used parts are created equal. If you’re not careful, you might end up with a part that doesn’t fit, doesn’t work, or causes more headaches than it’s worth.

As someone who’s worked with countless vehicle owners, mechanics, and auto repair professionals, I’ve seen it all—great deals, bad purchases, and everything in between. To help you make the best choice, here are the five things you should always check before buying used auto parts.

Why Used Auto Parts Are a Smart Choice

Cost Savings

Let’s face it: vehicle repairs can be expensive. Buying used parts can cut those costs significantly, often by 50% or more, without sacrificing quality. For example, a customer of mine once needed a new alternator for their truck. A new one cost $400, but they found a used one for $150—and it worked just as well.

Availability for Rare or Older Models

If you own an older or less common vehicle, finding new parts can be a challenge. Used parts suppliers often have a wide inventory, including hard-to-find items for discontinued models or rare vehicles.

Environmental Impact

Choosing recycled parts helps reduce waste and supports sustainable practices. Every part you reuse is one less part ending up in a landfill.

5 Things to Check Before Buying Used Auto Parts

1. Verify Compatibility with Your Vehicle

The first rule of buying used auto parts: make sure it fits! Compatibility isn’t just about the make and model—it’s about matching the exact specifications for your vehicle.

• Check the Part Number: Look for the original equipment manufacturer (OEM) part number on your old part or in your vehicle’s manual.
• Use Your VIN: Your Vehicle Identification Number can help verify compatibility, especially for complex components like engines or transmissions.

Pro Tip: When I was helping a friend repair their SUV, we thought we’d found the perfect used side mirror—until we tried to install it. It turned out to be for the wrong trim level, and it didn’t align properly. Lesson learned: double-check everything!

2. Inspect the Part’s Condition

Before you buy, take a close look at the part’s condition. Even if it’s compatible, a damaged or worn-out part won’t do you any good.

• Look for Visible Damage: Check for cracks, rust, or excessive wear.
• Inspect Moving Parts: If the part has moving components, ensure they operate smoothly and aren’t loose or stiff.

One time, a mechanic I know bought a used radiator that looked fine at first glance. Upon closer inspection, they noticed small cracks that would have led to leaks. A quick inspection saved them from installing a faulty part.

3. Ask About the Part’s History

Knowing where a part came from and how it was used can give you confidence—or raise red flags.

• Ask About Mileage: Parts like engines, transmissions, or brake rotors can have limited lifespans, so it’s essential to know how much use they’ve had.
• Check the Source: Was the part removed from a functioning vehicle? Was the vehicle involved in an accident? Parts from severely damaged vehicles may have hidden issues.

Pro Tip: A customer once asked me about a low-cost used battery. When we called the supplier, they admitted it had been sitting unused for years. Batteries degrade over time, even if they’re not in use, so the deal wasn’t as good as it seemed.

4. Check for a Warranty or Return Policy

Not all used parts come with a warranty, but reputable suppliers often provide some form of guarantee. This can make a big difference if the part fails prematurely.

• Understand the Terms: Does the warranty cover installation? How long does it last? What’s the process for returns?
• Prioritize Reputable Suppliers: Shops that stand by their parts are more likely to sell quality products.

Example: A repair shop I worked with once bought a used alternator that failed after a week. Luckily, the supplier offered a 90-day warranty, so they were able to replace it at no extra cost.

5. Compare Prices and Suppliers

Used parts can vary widely in price, even for the same item. Doing a little homework can help you avoid overpaying—or falling for deals that are too good to be true.

• Research Market Rates: Check multiple suppliers to get an idea of the average price.
• Check Reviews: Look for suppliers with good reviews and a reputation for selling reliable parts.

Warning: I once came across a shop offering engines at ridiculously low prices. After some digging, I discovered they weren’t testing their parts before selling them, leading to high failure rates. Cheap isn’t always better!

Bonus Tips for Buying Used Auto Parts

Buy from Reputable Suppliers

Look for suppliers with certifications, such as those affiliated with the Automotive Recyclers Association (ARA). Certified suppliers follow strict quality standards, so you can trust their products.

Know Which Parts Are Safe to Buy Used

Some parts, like body panels, mirrors, and rims, are safe to buy used. Others, like airbags or brake pads, should always be purchased new for safety reasons.

Keep Documentation

Always ask for a receipt and any documentation about the part’s origin, condition, and warranty. This can save you trouble if you need to return or replace the part.

Conclusion

Buying used auto parts can be a smart and affordable way to maintain or repair your vehicle, but it’s important to know what to look for. By verifying compatibility, inspecting the condition, asking about the part’s history, checking for warranties, and comparing prices, you can make a confident purchase that saves you time and money.

Next time you’re shopping for used parts, use this guide as your checklist. It’ll help you avoid common pitfalls and ensure you’re getting high-quality components.

Ready to find the perfect used auto parts? Contact us for a free consultation or browse our inventory online. Have tips or experiences to share? Drop a comment below—we’d love to hear from you!

Not finding what you were looking for?

Western Auto and Truck Parts is here to assist. Well-known for our extensive selection of used engines, differentials, and auto body parts at competitive prices, we also specialize in providing high-quality used automotive glass and more. Whether you're searching for a rare component or need advice on the best options for your vehicle, our knowledgeable staff is dedicated to helping you find the perfect solution. Don't hesitate to reach out or visit us for personalized assistance and explore our comprehensive inventory for all your automotive needs.

HERE ARE WESTERN AUTO AND TRUCK PARTS’ TOP RESOURCES ON BUYING AUTO PARTS:

Auto Recycling on Wikipedia
Automotive Recyclers of Canada
Alberta Automotive Recyclers and Dismantlers Association