Replacing an engine is the largest single repair most vehicles ever face, and a dealer quote for a new one regularly costs more than the car is worth. A used engine pulled from a low-mileage donor changes that math completely, which is why swapping in a second-hand unit has become the standard route for keeping an older vehicle on the road rather than writing it off.
Sourcing one is where the process gets complicated, because engines are heavy, expensive to ship and impossible to assess by eye, which makes where you buy a bigger part of the decision than it is with any other component. Recycler networks, salvage directories, marketplaces and self-service yards all carry them, but they differ enormously in what testing has been done, what mileage is documented, and who absorbs the cost when a unit turns up with a problem.
Below are the best places to buy used car engines in 2026, compared on donor mileage and history, engine code matching, testing before sale, warranty terms and what the whole thing costs delivered. You will find what each one does well, and which have some limitations worth knowing before you order.
Types of Used Car Engines and What Each One Means
Used engines are sold under several different labels, and those labels are not standardized across the industry. Knowing which one you are looking at explains most of the price differences you will see across listings.
Used OEM engine
An original factory engine removed from a donor vehicle and sold as it came out, with the internals, sensors and mounting points untouched. Condition depends entirely on the donor's mileage and service history, which is why documentation matters more here than with any other option. This is the cheapest route to a genuine factory unit and the one most of this list deals in.
Remanufactured engine
Stripped to the block, machined, and reassembled with new wear components to a published specification. Consistency is the selling point, and warranties tend to be longer, but the price sits closer to new and almost all of them carry a core charge on your old unit.
Rebuilt engine
Repaired rather than rebuilt to spec, usually by replacing whichever components had failed while leaving the rest in place. Quality varies with whoever did the work, and rebuilt units are frequently listed alongside used OEM engines with nothing in the title to distinguish them.
Long block and short block
A short block is the bottom end only, meaning block, crankshaft and pistons. A long block adds the cylinder head and valvetrain. Neither includes the intake manifold, alternator, starter or accessories, so a low price on one of these often means several hundred dollars of parts you assumed were coming.
Complete drop-in engine
Sold with the accessories still attached, ready to fit with minimal transfer of parts from the old unit. Costs more up front and saves labor at installation, which usually makes it the cheaper option overall once a shop is doing the work.
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1. OEM Used Auto Parts |
| Pros | Cons |
|---|---|
| Genuine OEM parts throughout, with no aftermarket equivalents | Sold only through the official website, not third-party marketplaces |
| Part number and interchange number published on every listing | Catalog is curated rather than exhaustive, so rare parts may not be stocked |
| Full compatibility chart by year, trim and engine on every product | |
| Every part inspected before listing | |
| Free 90-day warranty covering electronics as well as mechanical parts | |
| Free shipping across 48 states with no core charge | |
| Real depth in electronics, interiors and lighting, not only mechanical assemblies |
OEM Used Auto Parts takes the top spot for combining genuine factory stock with the fitment information needed to order confidently and warranty terms that cover the parts most sellers exclude. Inventory is pulled from salvage yards nationwide, cleaned and inspected before it reaches the site, and sold directly rather than through third-party sellers, so there is one point of contact if anything needs sorting out.
Listings identify the vehicle each engine came out of, so compatibility can be checked against your own engine code and interchange number before anything is ordered. That matters more on engines than on any other part, because a mismatch is not a return you can process casually once a unit is on a pallet in your driveway.
The absence of a core charge is worth noting on a purchase this size, since core deposits on engines routinely run into the hundreds and are only refunded once the old unit has been crated and shipped back.
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2. LKQ Online |
| Pros | Cons |
|---|---|
| Wide selection of body and mechanical parts | Used OEM listed alongside aftermarket and remanufactured |
| Easier to find parts for older vehicles | Warranty terms vary by part category rather than applying uniformly |
| Multiple fulfillment locations shorten delivery times | Ordering and fulfillment are built around trade accounts more than retail buyers |
LKQ operates one of the largest vehicle recycling networks in North America, with salvage operations across the United States and an online storefront drawing on that inventory. It supplies used OEM car parts to body shops and repairers at scale, which makes it one of the more reliable places to find a part for an uncommon vehicle.
The nationwide network is the real strength, and for an older or less common vehicle the odds of a suitable engine sitting in stock somewhere are better here than almost anywhere else. However, used OEM units are listed alongside rebuilt and aftermarket alternatives with nothing obvious in the product title to separate them, and warranty terms change depending on the category rather than applying across the catalog.
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3. Car-Part.com |
| Pros | Cons |
|---|---|
| Covers small yards you would never find otherwise | You deal with a yard, not Car-Part |
| Shows what is actually in stock nationwide | Listings often lack condition detail or photos |
| Interchange numbers help confirm a part fits | No support if the part turns up wrong |
Car-Part.com indexes live inventory from thousands of independent salvage yards and returns matches with interchange data attached, which makes it the quickest way to establish whether a particular engine exists anywhere in the country. It is a directory rather than a seller, so the search happens here and the purchase happens with the yard.
Searching thousands of yards at once, with interchange numbers built into the results, is something no individual seller can replicate. The limitation is that Car-Part.com does not sell anything itself. Once a match appears you are negotiating with a yard you have never used before, arranging freight yourself in many cases, and accepting whatever warranty that particular yard happens to offer.
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4. eBay Motors |
| Pros | Cons |
|---|---|
| Biggest selection, including rare and discontinued parts | Aftermarket parts mixed in with used OEM |
| Buyer protection if an order goes wrong | Condition and testing vary from seller to seller |
| Returns depend on the individual seller |
eBay Motors carries an enormous volume of used engines listed by dismantlers, independent yards and private sellers, covering current models through to vehicles long out of production. For an unusual or discontinued engine, it is often the only place still holding stock.
The fitment filter narrows results to a specific year, make and model, which makes the volume of listings manageable. The drawback is consistency, since every seller sets their own returns policy, testing standard and freight terms, so what one listing offers tells you nothing about the next. Returning an engine that does not fit is also a far bigger undertaking than returning a switch, and the cost of that usually lands with the buyer.
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5. My Auto Store |
| Pros | Cons |
|---|---|
| Free shipping across the continental US | Electrical parts cannot be returned at all |
| Six-month warranty on every part | 25% restocking fee may apply to returns |
| Return shipping is at your own cost |
My Auto Store is a large independent auto recycler, stocking used OEM engines for foreign and domestic makes from its Camden, New Jersey facility. Everything is dismantled and stored at a single site, which keeps handling and record keeping consistent.
Six months of warranty cover is longer than most sellers in this comparison offer, and free freight on a component this heavy is a genuine saving. Still, the return terms underneath deserve attention. Engines sent back with fluids attract a separate draining fee, a 25% restocking fee may apply on top, and return shipping is at your own cost, which means a unit that turns out to be wrong is an expensive mistake rather than a simple exchange.
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6. Pick-n-Pull |
| Pros | Cons |
|---|---|
| Cheapest used OEM parts on the market | You pull the part yourself, with your own tools |
| No core charges on any part | Nothing is tested or inspected before sale |
| No shipping, so you have to drive to the yard |
Pick-n-Pull runs a chain of self-service salvage yards across the US, where buyers pay a small entry fee, find the donor vehicle on the lot and remove the part themselves. An online search shows which vehicles are currently on the ground at each location.
Price is the obvious draw, and the online inventory search means a trip can be planned around a specific donor vehicle. Everything else, though, is on you. Pulling an engine is a full day with a hoist and a helper, the unit is sold exactly as it sits in the car with no testing of any kind, and getting several hundred pounds of iron home is a logistics problem before it is a mechanical one. Nothing is verified before it leaves the yard, which makes a bad engine a wasted purchase.
How We Ranked the Best Places to Buy Used Car Engines
To build this list, we focused on sellers stocking genuine factory engines pulled from real vehicles, rather than rebuilt or remanufactured units sold under an OEM label.
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Genuine OEM stock: Sellers holding original factory engines ranked above those mixing rebuilt and aftermarket units into the same search results, since the distinction is rarely obvious from a product title.
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Mileage and donor records: Sellers documenting the donor vehicle's odometer reading and origin ranked above those listing an engine with no history attached.
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Fitment information: Published interchange numbers and donor vehicle details ranked above generic descriptions, since engine variants within a single model year are where these purchases go wrong.
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Testing standards: Units checked before listing ranked above engines pulled and shelved without inspection, as a used engine cannot be judged from a photograph.
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Warranty and returns: We weighted the conditions attached to a warranty more heavily than its length, particularly installation requirements and who pays return freight.
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Total delivered cost: Free or transparent freight and no core charge ranked above low listed prices with hundreds added at checkout, since the total is what you actually pay.
Focusing on sellers that document what they are selling and stand behind it means this list points you toward engines that run and keep running. A cheaper unit that fails costs more than the right one ever would.
Best Overall: OEM Used Auto Parts
OEM Used Auto Parts is the best place to buy used OEM car parts, supplying genuine factory components at a fraction of dealer pricing without the guesswork that usually comes with buying used. Every part is pulled from a salvaged vehicle, cleaned and inspected before listing, and matched to your car by part number, interchange number and a full compatibility chart, so you know it fits before you order rather than after the box arrives.
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Verified fitment : Donor vehicle details and interchange number published on every listing, so the engine can be matched to your own code before you buy
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Inspected before listing: Every unit checked before it goes on the site, not pulled and shelved
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Warranty as standard: Free 90-day cover on every engine, with extended options available
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No core charge : No deposit held against the return of your old unit, so the listed price is what you pay
Used Car Engine Installation Checklist
Buying the right engine is half the job. What happens during the swap decides how long it runs, and most of the items below cost very little while the engine is out of the car.
Replace everything that is cheaper to reach now: Timing belt, water pump, thermostat, gaskets and rear main seal all cost a fraction to change while the engine is out. Skipping them is the most common reason a good used engine ends up back on the lift.
Fit a new clutch or flex plate while you are in there: The labor is already paid for at that point, and doing it later means pulling the engine or transmission out again.
Flush the cooling system before the engine goes in: Overheating ends more replacement engines than mechanical failure does, and old coolant or a blocked radiator will do it just as effectively on a fresh unit.
Change the oil and filter straight after installation: Whatever was in the engine when it was pulled has been sitting since, and the warranty on most used engines requires documented fluid changes anyway.
Break it in gently for the first few hundred miles: Varied engine speeds, no sustained high load and no towing gives seals and rings time to seat properly.
Keep every receipt and record: Warranty claims on used engines are routinely declined for missing proof of professional installation or a documented oil change, so the paperwork is part of the cover.
Is a Used Car Engine as Good as a New One?
In most cases, yes. A used OEM engine is the same unit the manufacturer built, with the original internals, sensors and tolerances intact, so it performs as the factory intended rather than approximating it the way a rebuilt engine does. The real variable is how much life the donor vehicle used up, which is why documented mileage matters more than anything else on the listing.
Longevity comes down to the swap as much as the unit. Modern engines routinely pass 200,000 miles when fluids are changed on schedule and the cooling system is sound, and one installed properly is no more likely to fail than the engine it replaced. Most problems traced back to used engines turn out to be installation shortcuts or an overheating issue that was never fixed.
Much of it comes down to what you know before you buy. Documented mileage, a published interchange number, testing before sale and clear warranty terms are what tell you whether an engine will perform like the one it replaced. OEM Used Auto Parts publishes all of it on every listing and inspects each unit before it goes on the site, so nothing is left to find out after the swap.