Which Subaru has boxer engine?

The boxer engine is Subaru’s defining feature—an opposed, horizontally opposed flat-four (and in some cases flat-six) layout. In practice, virtually every current Subaru model relies on this design, delivering a low center of gravity and confident all-wheel-drive performance across the lineup. Here is a concise guide to which Subarus use the boxer engine and what that means for driving dynamics.

What a boxer engine is and why Subaru uses it

A boxer engine uses cylinders arranged in opposing pairs that move in and out like a boxer's punches. This layout keeps the engine compact and, importantly for Subaru, pairs well with the brand’s symmetrical all-wheel-drive system by providing a balanced, low, and predictable chassis feel. Over the years Subaru transitioned from older EJ-era engines to the newer FB/FA families, while continuing to refine performance with turbocharged options in sportier models. The result is a distinctive sound, smooth operation, and a bias toward stability and handling in varied conditions.

Current lineup and engine notes

Representative models that currently rely on the boxer engine across their powertrains include:

• Impreza


• Crosstrek (XV)


• Forester


• Outback


• Legacy


• WRX


• BRZ


• Ascent

In broad terms, most mainstream Subarus use a naturally aspirated boxer engine in lower trims and a turbocharged boxer in higher-performance or larger-model variants. Notably, the sport-oriented WRX and the BRZ (the Toyota 86 sibling) rely on turbocharged flat-four power, while family-oriented models use efficient, reliable boxer four-cylinders to support standard all-wheel drive and balanced dynamics.

Performance and maintenance considerations

The boxer layout contributes to a lower center of gravity, aiding handling and stability in all-wheel-drive applications. For owners, routine maintenance—oil changes, spark plugs, belts and hoses, and periodic coolant and transmission service—follows the same cadence as most modern gasoline engines but benefits from a compact, accessible layout. Subaru has continually refined the engine lineup from the EJ family to FB/FA, improving reliability and efficiency across generations. In some markets, mild-hybrid variants labeled “e-BOXER” have appeared, though full electrification remains limited to future product plans in many regions.

Future direction and what it means for boxers

Subaru remains committed to the boxer engine as a core element of its identity, emphasizing reliability, smoothness, and AWD synergy. While electrification and hybrids are advancing globally, the brand has continued to develop the flat-four and flat-six family, with ongoing refinements in fuel economy and emissions. In markets where performance is paramount, turbocharged boxer engines (used in WRX, BRZ, and higher-capacity variants such as the Ascent in some regions) will continue to define the sporty side of the lineup, even as electrified options expand in the broader industry.

Summary

Subaru’s boxer engine is a unifying thread across its current lineup, powering everything from practical sedans and crossovers to sporty coupes. The Impreza, Crosstrek, Forester, Outback, Legacy, WRX, BRZ, and Ascent all rely on this design, with turbocharged boxers driving performance models and naturally aspirated variants underpinning everyday utility. As the brand evolves, the boxer configuration remains central to Subaru’s handling, balance, and all-wheel-drive philosophy.

Is the Subaru 3.6 a Boxer engine?

3.6-liter Flat-6
The largest SUBARU BOXER® engine available, this 3.6-liter 6-cylinder serves up 256 horsepower and 247 lb. -ft. of torque.

Is the 2.5 L Subaru engine a Boxer engine?

It was announced in September 2010 as the third generation (following the EA 1st and EJ 2nd generations) boxer engine family with 1.6, 2.0, and 2.5 litre naturally aspirated and turbo-charged variants.

Are Subaru boxer engines any good?

Yes, Subaru boxer engines are generally considered good, offering benefits like a low center of gravity for better handling, a smoother and quieter ride due to less vibration, and overall dependability with proper maintenance. While older models had issues with head gaskets and a specific 4-cylinder engine, newer versions are highly reliable. 
This video explains the advantages of Subaru's boxer engine, such as better handling and a smoother ride: 57sOTTO'S SUBARUYouTube · Jan 24, 2024
Advantages

• Improved handling: The low and horizontal design places the engine lower in the chassis, resulting in a low center of gravity. This leads to more balanced and predictable handling. 
• Smooth and quiet operation: The opposing pistons create a naturally balanced engine, which significantly reduces vibration compared to other designs. 
• Enhanced safety: The boxer engine's low profile can allow it to go under the cabin in a head-on collision, which is a safety benefit. 
• Good fuel economy: Subaru has improved the efficiency of its boxer engines, and some models achieve impressive highway mileage. 
• Durability: When properly maintained, many Subaru boxer engines are known to last well beyond 200,000 miles. 

Disadvantages and past issues

• Past head gasket issues: Older Subaru models, particularly the 2.5 DOHC engine from the late 1990s, were known for head gasket failures. 
• Maintenance complexity: The horizontal layout can make some maintenance tasks, like changing spark plugs, more challenging and potentially more expensive. 
• Past piston ring problems: In the past, some four-cylinder boxer engines had issues with piston rings. 

Modern reliability

• Subaru has significantly refined the boxer engine over the years, and its modern versions are considered more reliable than ever. 
• For example, the latest FB series engines have received high marks for predicted reliability in recent years, according to resources like Consumer Reports. 

This video discusses the potential issues with Subaru boxer engines, including past problems: 57sPhill PanaYouTube · May 7, 2024

Which Subaru models have boxer engines?

The following Subaru vehicles are equipped with the BOXER engine:

• Subaru Ascent.
• Subaru BRZ.
• Subaru Crosstrek.
• Subaru Forester.
• Subaru Impreza.
• Subaru Legacy.
• Subaru Outback.
• Subaru WRX.