You're staring at a repair bill and the parts counter just gave you three options: a new OEM part, an aftermarket alternative, and a used part from a salvage yard. The price spread is massive. The quality difference? Not always what you'd expect.
This guide breaks down OEM, aftermarket, and salvage parts so you can pick the right one for your repair, your car, and your budget. For the full picture on buying used parts, check out our used auto parts buying guide.
What the Labels Mean
Before you compare prices, make sure you know what each label actually refers to.
OEM (Original Equipment Manufacturer) means the part was made by or for the vehicle's manufacturer. It's identical to what rolled off the assembly line. New OEM parts come in the automaker's branded box and carry the highest price tag. Aftermarket means a third-party company manufactured the part. It wasn't made by the automaker and it wasn't approved by the automaker. Aftermarket brands range from premium (Moog, Dorman, Centric) to bottom-shelf imports with no brand reputation at all. Salvage / recycled / used OEM all describe the same thing: an original factory part that's been removed from a donor vehicle by an auto recycler. The part was OEM when it was installed. It's still OEM now. The only difference is mileage and wear.Key takeaway: A "used OEM" part and an "aftermarket" part aren't the same thing. Used OEM was built to factory spec. Aftermarket was reverse-engineered by someone else.
Side-by-Side Comparison
Here's how the three types stack up across the factors that matter most.
| Factor | New OEM | Aftermarket | Used OEM / Salvage |
|---|---|---|---|
| Cost | Highest (full retail) | 20%–50% less than OEM | 25%–75% less than OEM |
| Quality | Factory standard | Varies wildly by brand | Factory standard, condition varies |
| Fitment | Guaranteed exact fit | May need modification | Guaranteed exact fit (same VIN match) |
| Warranty | Manufacturer warranty | Varies (30 days to lifetime) | 30–90 days typical from recycler |
| Availability | Limited for older vehicles | Wide for popular models | Broad: 12M+ vehicles recycled/year |
| Best for | New cars under warranty | Routine wear items on older cars | Most repairs, best value |
When to Buy New OEM
New OEM makes sense in a few specific situations.
Your car is under factory warranty. Using OEM parts keeps the repair history clean. While the Magnuson-Moss Warranty Act says a dealer can't void your warranty for using non-OEM parts, proving an aftermarket part didn't cause a failure is a headache you don't need. The part is safety-critical and wear-dependent. Brake pads, airbag components, seat belt assemblies, and tires should always be new. These items wear out by design and a used version has an unknown service life remaining. For a full rundown, see our guide on car parts you should never buy used. Insurance is covering the repair. If your insurer is paying, push for OEM parts in your claim. Many states require insurers to disclose when they're substituting aftermarket parts, and you can often negotiate OEM coverage.When to Buy Aftermarket
Aftermarket parts earn their spot for routine maintenance on older vehicles.
Oil filters, air filters, spark plugs, brake rotors. For wear items you'll replace again in 20,000 to 50,000 miles, a quality aftermarket brand does the job. You don't need factory-original oil filters on a 12-year-old Camry. Cosmetic upgrades. Aftermarket bumper covers, grilles, and lighting upgrades often cost half the OEM price. If exact factory appearance isn't your priority, aftermarket works fine. Premium aftermarket brands exist. Not all aftermarket is cheap. Brands like Moog (suspension), Centric (brakes), and Denso (electrical) build parts that meet or exceed OEM spec. The key is researching the brand. Generic no-name aftermarket is where quality drops off a cliff. The risk. Cheap aftermarket parts can cause fitment problems, premature failure, and cascading damage. A $30 aftermarket water pump that fails after 8 months can overheat your engine and cost you thousands. The initial savings evaporate fast when a part doesn't hold up.When to Buy Used OEM / Salvage
For most repairs, used OEM parts from a salvage yard are the smartest buy. Here's why.
You get factory quality at salvage prices. A used OEM headlight assembly that costs $75 from a recycler is the same part the dealer sells new for $350. It was designed, tested, and built by the automaker. It fits perfectly because it's the same part number. Availability beats both alternatives. Need a part for a 2009 Honda Accord? The dealer may have discontinued it. Aftermarket manufacturers may never have made it. But salvage yards across the country have 2009 Accords in stock right now. The U.S. recycles roughly 12 million vehicles every year, and that's a deep parts pipeline. Non-wear components last. Body panels don't wear out; they get damaged. An undamaged used fender is functionally identical to a new one. The same goes for doors, hoods, trunk lids, mirrors, interior trim, seats, window regulators, alternators, starters, and electronic modules. These parts don't degrade with normal use the way brake pads or tires do. Used OEM beats cheap aftermarket on reliability. This is the point most people miss. A used OEM alternator was built to the automaker's specifications and tested to pass their quality standards. A $45 aftermarket alternator from an unknown brand was not. Used OEM parts are tested by the manufacturer and often more reliable than cheap aftermarket copies.Parts That Change the Math
The "right" choice depends on the specific part. Here's a quick decision framework.
Always buy new: Brake pads, rotors (if scored), airbag modules, tires, seat belts, timing belts, gaskets, and seals. These are wear items or single-use safety components. Buy used OEM when possible: Headlights, tail lights, fenders, bumpers, doors, mirrors, seats, dashboards, instrument clusters, ECUs, alternators, starters, power steering pumps, AC compressors, window motors, and wiring harnesses. Aftermarket is fine for: Oil filters, air filters, cabin filters, spark plugs, wiper blades, and bulbs. Routine consumables where brand quality is predictable and replacement intervals are short. Engines and transmissions: Used OEM is usually the best call. A remanufactured engine costs $3,000 to $5,000. A used engine with verified mileage from a recycler runs $800 to $2,500. The savings are significant, and reputable recyclers test major drivetrain components before selling them. Learn what to look for in our guide on how to inspect used auto parts.For pricing benchmarks across all these categories, check out our used auto parts pricing guide.
How to Get Salvage Parts
Finding the right used OEM part used to mean calling yard after yard until someone had it. That's changed.
Online databases like Car-Part.com search millions of listings across thousands of yards. You enter your year, make, model, and the part you need. Results show pricing, mileage, and condition grades. Voice hotlines connect you directly with salvage yards that have your part in stock. Hotline HQ connects buyers with 500+ salvage yards carrying OEM parts across the country. You describe what you need, and yards with matching inventory respond with pricing and availability, often within minutes. Self-service junkyards let you walk the lot and pull parts yourself. Prices are the lowest you'll find anywhere, but you need tools, time, and enough mechanical knowledge to remove parts without damaging them. What to verify before you buy:- Exact year, make, model, trim, and engine match (use your VIN)
- Part condition: ask about cracks, corrosion, or electrical function
- Warranty terms: most professional recyclers offer 30 to 90 days
- Return policy: know the rules before you pay
- Shipping method and timeline for online/phone orders
Once you've decided which route fits your repair, find used auto parts across 500+ yards in one request, or browse the Hotline HQ marketplace to see what's moving right now.