What if I do not approve the photos?

Every dollar back. No restocking fees, no return freight charges.

Collection: Used Engines and Transmissions For Sale

Q: What is the warranty?

Up to 3 years, depending on the specific unit.

Q: How long until delivery?

Prep and ship time is 3-5 business days. Transit time is 2-3 business days after dispatch via freight carrier.

Q: Why cheaper than dealer new?

Used OEM from low-mileage donors. Same engineering, fraction of the cost.

Q: When can I reach customer service?

24 hours Monday through Saturday.

100K+

verified units in stock

Customer Reviews

Up to 3 yrs

warranty included

Photos before
shipment

Used Engines and Transmissions For Sale

100K+ verified used engines and transmissions across 36 brands and every model year from 1990 to today — VIN-matched, ASE-tested, photographed before shipment, warranty included, plus 30-day money-back. Free freight to all 50 states. Pick your brand below, or text us your VIN for a personal match in minutes.

🔧 EnginesI need an EngineBrowse verified used engines across every major brand, year, and engine code — VIN-matched and compression-tested.BROWSE ENGINES BY BRAND→ ⚙ TransmissionsI need a TransmissionBrowse verified used transmissions — automatics, manuals, CVTs, dual-clutch, Allison diesel — all Shift-Tested.BROWSE TRANSMISSIONS BY BRAND→

Or text your VIN to +1-307-441-5554 · call 1-877-313-8995 · email info@autopowersource.com

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Up to 3-Year Warranty

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Photos Before Shipment

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ASE-Tested & Verified

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Free Nationwide Shipping

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30-Day Money-Back

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Secure SSL Checkout

Browse by Brand

36 brands ranked by live inventory count — figures are the real number of listings in each collection, updated with every catalogue refresh. Each brand page shows engine-family or transmission-family hero shots, a year-by-year index, a model breakdown, and a buying guide written for that brand's known fitment traps.

All Used Engines →All Used Transmissions →

Mercedes

9,690 units in stock

Engines (4,248)Transmissions (5,442)

Ford

9,433 units in stock

Engines (3,268)Transmissions (6,165)

Chevy

7,912 units in stock

Engines (2,978)Transmissions (4,934)

GMC

5,472 units in stock

Engines (1,836)Transmissions (3,636)

Dodge

4,229 units in stock

Engines (1,768)Transmissions (2,461)

Volkswagen

4,133 units in stock

Engines (1,788)Transmissions (2,345)

BMW

3,961 units in stock

Engines (1,858)Transmissions (2,103)

Toyota

3,536 units in stock

Engines (1,826)Transmissions (1,710)

Audi

2,963 units in stock

Engines (1,124)Transmissions (1,839)

Hyundai

2,930 units in stock

Engines (1,431)Transmissions (1,499)

Nissan

2,495 units in stock

Engines (915)Transmissions (1,580)

Mazda

2,167 units in stock

Engines (1,028)Transmissions (1,139)

Honda

2,143 units in stock

Engines (1,211)Transmissions (932)

Kia

2,020 units in stock

Engines (912)Transmissions (1,108)

Jeep

1,814 units in stock

Engines (725)Transmissions (1,089)

Ram

1,467 units in stock

Engines (449)Transmissions (1,018)

Volvo

1,418 units in stock

Engines (712)Transmissions (706)

Subaru

1,376 units in stock

Engines (757)Transmissions (619)

Cadillac

1,211 units in stock

Engines (557)Transmissions (654)

Lexus

992 units in stock

Engines (536)Transmissions (456)

Chrysler

964 units in stock

Engines (518)Transmissions (446)

Buick

927 units in stock

Engines (452)Transmissions (475)

Mitsubishi

921 units in stock

Engines (450)Transmissions (471)

Infiniti

889 units in stock

Engines (412)Transmissions (477)

Pontiac

805 units in stock

Engines (423)Transmissions (382)

Saturn

749 units in stock

Engines (277)Transmissions (472)

Acura

645 units in stock

Engines (333)Transmissions (312)

Mercury

638 units in stock

Engines (258)Transmissions (380)

Porsche

447 units in stock

Engines (248)Transmissions (199)

Mini Cooper

381 units in stock

Engines (147)Transmissions (234)

Isuzu

319 units in stock

Engines (149)Transmissions (170)

Saab

294 units in stock

Engines (168)Transmissions (126)

Lincoln

260 units in stock

Engines (260)

Land Rover

227 units in stock

Engines (227)

Suzuki

163 units in stock

Engines (163)

Scion

113 units in stock

Engines (48)Transmissions (65)

📱 Not sure which engine code or transmission fits? Text us your VIN — we match in minutes.Text Your VIN →

Why Buy a Used Engine or Transmission from Auto Power Source

We have spent over a decade sourcing engines and transmissions from carefully vetted salvage and recycling partners across North America, and we catalogue every unit by donor VIN before it is ever listed. That is why the 100K+ listings on this site are searchable by year, make, model, engine code and transmission ID — the same identifiers a dealership parts counter uses — instead of vague "fits most" descriptions.

Every unit goes through the same six-step process before it ships: VIN-matching against your vehicle, ASE-certified testing (compression and leak-down on engines, shift-testing through every gear on transmissions), a run-stand noise and smoke check, a full visual inspection, multi-angle photography sent to you for approval, and palletised freight at no charge. Units that fail any step never reach a buyer.

You pay a fraction of dealer-new pricing for identical factory engineering — and for many vehicles older than ten years a tested used OEM unit is the only genuine option left, because the new part has been discontinued. Every order carries a warranty sized to the age of the unit, 30 days from delivery to return for any reason with no restocking fee, and a 0% fitment-related return rate across everything we have shipped.

Your Replacement Options: Compared

Most owners face four real choices when an engine or transmission fails:

← Swipe sideways to see all columns →

Option	Cost	Reliability	Warranty	Fitment Match
Used OEM (our inventory)	$$$ Best Value	High — tested	Included	VIN-matched
New OEM (dealer)	$$$$$ 2-4× more	High	Manufacturer	Exact
Aftermarket / Reman	$$$$	Varies	6-12 mo	May adapt
Junkyard	$ Cheapest	Unknown	None	DIY

Tested used OEM hits the sweet spot — same engineering as new, fraction of the cost.

Used Engine & Transmission Buying Guide

Five things to verify before buying any used engine or transmission online:

Match the code, not the displacement. The 8th digit of your VIN identifies the engine; the transmission tag or door-jamb code identifies the gearbox. Two units with the same litres can have different heads, intake ports, bell-housing patterns or calibrations.
Check the build date. Manufacturers change units mid-year. Our listings name the split dates (for example "From 7/24/00") so the donor matches your production window.
Specify drivetrain. 2WD vs 4WD, FWD vs AWD, and PTO vs non-PTO change the case, oil pan, output shaft and accessory brackets.
Ask how the unit was tested. A compression number and a shift-test through every gear are worth more than a mileage claim — ask for both, and ask for photos of the actual unit before you pay.
Read the warranty term on the product page. Our term scales with the age of the unit; the exact months or years are printed on every listing, and extended coverage is available.

Our ASE-certified technicians verify every one of these points against your VIN before any unit ships.

📞 Need help choosing? Talk to our team live.Call 1-877-313-8995

What Our Customers Say

Live reviews from verified buyers on Trustpilot — updated automatically, not copied onto the page.

Learn More: Buyer Guides

Practical guides from our team — how to install a used engine or transmission, what to check on delivery, and what really matters when buying online.

APS Preinstallation Guide

Step-by-step guide to properly installing a used engine or transmission — what to inspect, prep, and torque before first start.

Post-Install Maintenance Checklist

Keep your used unit running like new — the break-in period, fluid intervals, and warning signs to watch for.

5 Things to Know Before Buying

Warranty terms, VIN matching, mileage, testing, return policy — the checklist every buyer should run through.

After Delivery: Inspection Guide

What to check the moment your unit arrives — freight damage, matching numbers, and what to photograph.

Frequently Asked Questions

What is the warranty on a used engine or transmission?

Every unit ships with a warranty included; the term is set by the age of the unit and is printed on each product page — up to 3 years on late-model units, with extended coverage available on older ones.

What does ASE-tested mean?

ASE-certified technicians compression-test every cylinder and run leak-down evaluation on engines. Transmissions are Shift-Tested through all gears under load. Plus noise & smoke verification, visual inspection, and multi-angle photography before shipment.

How long until delivery?

Prep and ship time is 3-5 business days. Transit time is 2-3 business days after dispatch via freight carrier — typically 5-8 business days from order to delivery.

Can I see photos before I buy?

Yes. Multi-angle photos of the actual unit are sent before payment. If you do not approve the photos, you get every dollar back — no questions, no restocking fees, no return freight charges.

Do I need my VIN?

Strongly recommended for exact-fit matching. Engines and transmissions vary by trim, body style, drivetrain (FWD/AWD/RWD/4x4), and build date. Text your VIN to +1-307-441-5554 and we will match options in minutes.

How do I find my exact engine or transmission?

Start with your brand below, pick engines or transmissions, then choose your model year. Every year page lists the models and engine or transmission families we stock, and every product is titled by its VIN engine code or transmission ID so you can confirm the match.

Why cheaper than dealer new?

Used OEM from low-mileage donor vehicles. Same engineering as factory new at a fraction of the cost — dealers are typically 2-4x our pricing, and many older units are no longer available new at all.

When can I reach customer service?

Call 1-877-313-8995 or text +1-307-441-5554 during the business hours shown in the site footer, or email info@autopowersource.com any time.

🏆 Earn $500 with Our Rewards Program

Every engine and transmission you buy earns rewards. 10 orders (yours or referred) = $500 cash credit. Silver, Gold, and Platinum tiers with discounts, priority support, and private inventory access.

See How Rewards Work →

Start With the Most-Searched Brands

100K+

Engines+Transmissions In Stock

0%

fitment-related returns

All 50

states covered, free freight

36

brands covered

Our 6-Step Inspection & Shipping Process

Every engine and transmission we ship has been through these six steps:

1. VIN-Matching

We match the donor VIN to your VIN to confirm engine/transmission code, emissions calibration, and drivetrain fit.

2. Tested & Verified

ASE-certified technicians compression-test every cylinder and run leak-down evaluation on engines. Transmissions are Shift-Tested through all gears.

3. Noise & Smoke Verification

Units are run to verify normal mechanical sound and clean operation — catches internal wear static tests miss.

4. Visual Inspection

Every accessible component is inspected: turbos, manifolds, valve covers, housings, accessories, sensor harnesses.

5. Photograph & Catalog

Multi-angle photos sent to you BEFORE we ship for your approval.

6. Palletize & Ship

Strapped on a heavy-duty wooden pallet, shipped via freight at no charge.

Our Photos-Before-Shipment Guarantee

Before any engine or transmission leaves our warehouse, we send you multi-angle photographs. You approve. If you do not approve, you get every dollar back — no questions, no restocking fees, no return freight charges. On top of 30-day money-back and the warranty included with every unit. Browse the full inventory below.

✉ Email Us at info@autopowersource.com

No match? Text VIN →