If your car’s engine or transmission is giving up, buying a used replacement can be a smart, budget-friendly move. But here’s the thing: not all used parts are created equal. One bad buy could cost you more in repairs—or worse, leave you stuck on the side of the road.
Before you make that purchase, here’s what you should check to protect your money and your ride.
🔧 1. Make Sure It Fits Your Vehicle
This might sound obvious, but you’d be surprised how often people buy the wrong part. Use your VIN (Vehicle Identification Number) to confirm compatibility. Even small differences in engine codes or transmission types can cause major headaches.
🔍 2. Check the Mileage
The lower the mileage, the better—but that’s not the only thing that matters. Try to find out how the part was used. A well-maintained 100k-mile engine can sometimes be a better deal than a neglected 70k one. Ask for records if they’re available.
🛠️ 3. Inspect for Leaks, Cracks, or Rust
Don’t skip the visual check. Look over the entire part for leaks, cracks, broken seals, or rust. If something looks off, it probably is. And if a seller won’t let you inspect the part—take that as a red flag.
📄 4. Ask About the Donor Vehicle
Where did this engine or transmission come from? Was the car wrecked? If it was a front-end collision and you’re buying the transmission, you might be okay. But if the engine was in the impact zone, think twice.
🧾 5. Look for a Warranty or Return Policy
No warranty? No deal. Even a 30- or 60-day limited warranty can give you peace of mind. Also, make sure you know the return policy before you buy—just in case.
🧪 6. Get a Test or Diagnostic Report
If available, ask for a compression test (for engines) or a transmission diagnostic scan. These can uncover internal issues like bad seals, weak compression, or slipping gears before you commit.
🔧 7. Consider Professional Installation
Some used parts must be installed by certified mechanics to keep the warranty valid. Even if it’s not required, a pro install can save you time, money, and frustration.
✅ Final Thoughts
Buying a used engine or transmission is a big decision—but with the right steps, it can be a great one. Do your homework, ask the right questions, and always buy from a trusted seller.
When you shop with Natty Auto Parts, we take care of these checks for you—so you can order with confidence. Every engine and transmission we sell is carefully inspected, tested, and backed by our quality assurance process. That means less stress for you, and more time getting back on the road.
