Collection: Used Subaru Engines For Sale
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Used Subaru Engines For Sale
800+ verified used Subaru engines in stock across every model year — Outback, Forester, Legacy, Impreza, WRX, WRX STI, Crosstrek, Ascent, BRZ, and Tribeca, and more. VIN-matched to your vehicle, ASE-tested by certified technicians, photographed before shipment, backed by up to a 3-year warranty plus 30-day money-back. Free freight nationwide.
Browse Subaru Engines by Year
Pick your model year for VIN-matched 2018 or 2017 inventory. More year pages coming online weekly — if your year is not yet linked, text us your VIN and we will match you.
Subaru Engines We Cover
Real engines from our warehouse, tested and ready to ship. Our Subaru inventory spans every major engine family Subaru has produced for the U.S. market.
Why Buy a Used Subaru Engine from Auto Power Source
Subaru's entire engine catalog is built around the horizontally-opposed (boxer) architecture, which gives Subaru vehicles their signature low center of gravity and symmetric all-wheel-drive layout. Within that catalog, generation matters enormously. The EJ25 SOHC 2.5L in a 2005 Outback has a well-documented head gasket vulnerability that was resolved with the switch to the FB25 in 2011 — but the FB25's early years (2011-2014) had their own class-action-level oil consumption issue that was resolved by later 2015+ ring redesign. The turbo lineage (EJ255, EJ257) is enthusiast-driven and demands verification against tuning history.
Our 800+ Subaru engines all come from low-mileage donor vehicles, cataloged by VIN, and held in our climate-controlled warehouse. Each unit clears our six-step process: VIN-matched to donor and target, ASE-certified compression test on every cylinder (essential for boxer engines where head gasket condition affects both banks), leak-down evaluation, run-stand noise & smoke verification, full visual inspection, multi-angle photographs for your approval, and palletized freight. On EJ25 SOHC units we specifically test for coolant intermix and head gasket integrity. On FB25 units (2011-2014) we verify ring condition and oil consumption history. On EJ257/EJ255 turbo units we inspect ringland condition and verify against any known tuning history via ECU data pulls.
You pay a fraction of dealer pricing for identical Subaru boxer engineering, ship free on a heavy-duty pallet anywhere in the continental U.S., and get 30 days from delivery to return — no restocking fees. Up to a 3-year warranty covers you after install. Across 100,000+ Engines+Transmissions In Stock, our fitment-related return rate stays at 0%.
Your Subaru Engine Options: Compared
Most Subaru owners face four real choices when their engine fails:
| Option | Cost | Reliability | Warranty | Fitment Match |
|---|---|---|---|---|
| Used OEM (this collection) | $$$ Best Value | High | Up to 3 years | VIN-matched |
| New OEM (dealer) | $$$$$ 2-4× more | High | Manufacturer | Exact |
| Aftermarket / Reman | $$$$ | 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.
Subaru Engine Buying Guide
Five things to verify before buying a used Subaru engine:
- EJ25 SOHC head gasket vulnerability (1996-2011) is the primary risk. The naturally-aspirated 2.5L EJ25 in Legacy, Outback, Forester, and Impreza (1996-2011 SOHC variants) has a documented external head gasket failure that leads to coolant loss and eventually internal coolant intermix. We compression-test and leak-down-test every EJ25 in inventory and disclose any prior head gasket service history. Consider factoring a head gasket replacement into your install budget if the donor mileage exceeds 100K.
- FB25 oil consumption class action (2011-2014, some 2015). The FB25 that replaced the EJ25 (2011+ Forester, Outback, Legacy) resolved the head gasket issue but introduced a piston ring problem on the first three model years that led to a class-action settlement. Later 2015+ units use redesigned rings. We verify oil consumption history and inspect ring condition on every FB25 in inventory.
- EJ257/EJ255 ringland failure is documented on modified units. The 2.5L turbo boxers (EJ257 in WRX STI, EJ255 in WRX/Forester XT/Legacy GT) are strong stock but the piston ringlands are documented to fail on aftermarket-tuned engines running higher boost. We pull ECU data where available to verify no aggressive tune history and inspect ringland condition via borescope before listing.
- FA20 vs FA20DIT: same displacement, very different engines. The naturally-aspirated FA20 in BRZ/FR-S/86 is Subaru-manufactured for the Toyota-Subaru sports coupe partnership — D-4S dual injection resolves carbon buildup. The FA20DIT is a different engine — direct-injection turbo boxer in WRX (2015-2021) and Forester XT (2014-2018). Verify by engine code, not displacement.
- EZ30 & EZ36 H6 flat-six oil pump wear. The flat-six variants (EZ30 in older Outback H6 and Tribeca, EZ36 in Tribeca/Outback 3.6R/Legacy 3.6R) don't have head gasket issues but the oil pump is a documented wear item past 120K miles. Symptoms include low oil pressure at idle and ticking on start-up. We check oil pressure on every H6 before listing.
Our ASE-certified technicians verify every one of these points against your VIN before any engine ships.
Learn More: Subaru Engine Guides
Practical guides from our team — how to install a used Subaru engine, what to check on delivery, and what really matters when buying online.
Frequently Asked Questions
What is the warranty on a used Subaru engine?
What does ASE-tested mean?
How long until delivery?
Can I see photos before I buy?
Do I need my VIN?
What if I do not approve the photos?
Why cheaper than dealer new?
When can I reach customer service?
Related Collections
Our 6-Step Inspection & Shipping Process
Every Subaru engine we ship has been through these six steps:
Our Photos-Before-Shipment Guarantee
Before any engine leaves our warehouse, we dismantle the donor unit and 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 up to 3-year warranty. Have a question about the guarantee or your specific order?
✉ Email Us at info@autopowersource.com