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Looking for used Subaru engines for sale? Finding a reliable replacement engine for your Subaru doesn't have to be a gamble. At Moon Auto Parts, we stock used Subaru engines for every major model from the Outback and Forester to the WRX STI and BRZ—all rigorously inspected, low-mileage, and VIN-matched to your vehicle. Every engine ships free to commercial addresses and comes backed by our industry-leading 4-year / 40,000-mile warranty, so you can get back on the road with confidence.
The Subaru Corporation (formerly Fuji Heavy Industries) in Japan, which is the one who Makes Subaru Engines. In 1966, Subaru found its first-ever boxer engine—the EA-series—when the Subaru 1000 rolled out, kicking off the era of the horizontally opposed engine in their cars. Fast forward to 1989, when the EJ-series was launched - and this is the engine family that really put Subaru on the map (you'll find it in Imprezas, Legacies, and Foresters). The EJ20 and EJ25 motors are a testament to the brand's reliability—with proper maintenance of oil and the timing belt, you can easily clock up over 250,000 kilometers (or about 155,000 miles).
In the 2010s, Subaru’s FA and FB-series engines replaced the EJ line-up, improving emissions and fuel efficiency. The FA-series engines (FA20, FA24) are compact, direct-injection flat-fours that succeeded the EJ line powering popular models like the BRZ, WRX, Subaru Ascent, and the Subaru Crosstrek engine, which runs the FB20 and more recently the 2.5L naturally aspirated flat-four across its lineup. Earlier, larger SUVs such as the Subaru Tribeca also utilized specially tuned boxer engines, showcasing the versatility of Subaru’s powertrains. Till the ongoing cars, Subaru continues using naturally aspirated and turbocharged boxer engines, including hybrid versions, under its “Dynamic Performance.”
Subaru engines in general use exclusively flat, horizontally opposed engines (four or six cylinders) across almost all its vehicles. The Subaru Boxer engine layout places cylinders horizontally, allowing a low center of gravity and balanced movement. The boxer configuration minimizes engine shake, making even high-mileage used Subaru engines smooth-running after proper servicing. Several brands are using boxer engines. The Boxer engine cars are Subaru, Porsche, and historically VW and Toyota (86/BRZ).
Subaru’s main modern engine families: EJ, FA, FB, EZ, and FA24F turbo. Subaru WRX engines use turbocharged flat-four engines (EJ20, EJ255, FA20F, FA24F). The Subaru STI Engine, a.k.a. the WRX STI, used the EJ257 2.5L turbocharged boxer engine through 2021.
Here is the list of makes that employ Subaru engines:
Subaru is well known for its symmetrical AWD layout. But you can still opt for a Subaru manual transmission on select models. The WRX, BRZ, and Impreza all offer 5-speed and 6-speed manual gearboxes. These keep driver engagement strong and give you a real mechanical feel. Manual transmission Subarus use a viscous-coupling center diff to manage AWD duties.
On the other hand, Subaru also offers the CVT option. Formally known as the Lineartronic Continuously Variable Transmission, it launched in 2009. It improved fuel efficiency and reduced drivetrain vibration noticeably. Unlike older gearboxes, it adjusts gear ratios smoothly without stepping through fixed gears. This keeps the engine revving at its sweet spot at all times. The result is smooth, consistent acceleration in everyday driving. As a bonus, it uses a chain-type system instead of belts. This adds durability and delivers torque more smoothly overall.
When it comes to finding Subaru engines for sale that are actually worth buying, Moon Auto Parts delivers every used subaru engine for sale in our inventory is Grade A inspected, VIN matched, and backed by our 4-year / 40,000-mile warranty, with free commercial shipping across the USA. Whether you need a daily-driver swap or a performance build, our inventory of used Subaru engines covers every make, model, year, and displacement. Use the AI-powered search on our homepage to quickly locate the right VIN-matched engine and place your order in minutes.
