Description

The Subaru EJ25D 2.5L H4 Remanufactured Engine 12/95–5/99 is based on Subaru’s EJ-series engine architecture, which was widely used in Subaru vehicles throughout the 1990s and early 2000s. The EJ25D engine is a 2.5-liter horizontally opposed four-cylinder engine, commonly referred to as a boxer engine.

The boxer engine layout places cylinders opposite each other horizontally. This design lowers the engine’s center of gravity and improves vehicle stability and balance. Subaru used this engine configuration across many of its vehicles because it works well with the brand’s symmetrical all-wheel-drive system.

The EJ25D engine features dual overhead camshafts (DOHC) and a four-valve-per-cylinder design. In factory configuration, this engine typically produces approximately 165 horsepower and around 162 lb-ft of torque, providing balanced performance for midsize passenger vehicles.

Remanufactured engines undergo a comprehensive rebuilding process where internal components are inspected, machined, and replaced when necessary to restore factory tolerances.

Where This Engine Is Used

The Subaru EJ25D 2.5L H4 Remanufactured Engine 12/95–5/99 was installed in several Subaru vehicles during the late 1990s.

Common vehicle applications include:

• Subaru Legacy
• Subaru Outback
• Subaru Forester (early models)
• Subaru GT models

These vehicles relied on the EJ25 engine platform to provide dependable performance and compatibility with Subaru’s AWD drivetrain systems.

Because many of these vehicles remain in service today, replacement engines are often required when high-mileage engines experience wear or internal damage.

Engine Performance and Reliability

The Subaru EJ25D 2.5L H4 Remanufactured Engine 12/95–5/99 is rebuilt through a professional remanufacturing process designed to restore engine performance.

Typical rebuilding procedures include:

• complete engine disassembly and inspection
• thorough cleaning of engine components
• precision machining of cylinder heads and engine block
• replacement of pistons, bearings, seals, and gaskets
• inspection of crankshaft, camshafts, and valve train components

The boxer engine configuration provides naturally balanced operation and helps reduce engine vibration.

Combined with Subaru’s all-wheel-drive system, the EJ25 engine delivers dependable performance across a wide range of driving conditions.

Why This Engine Is a Reliable Choice

Replacing a worn engine with the Subaru EJ25D 2.5L H4 Remanufactured Engine 12/95–5/99 offers several advantages.

Key benefits include:

• restored factory engine tolerances
• compatibility with Subaru AWD drivetrain systems
• balanced performance from boxer engine design
• durable engine construction
• extended lifespan for high-mileage vehicles

For many Subaru owners, installing a Subaru EJ25D engine replacement allows them to continue using their vehicles without replacing the entire drivetrain.

Who This Engine Is Best For

The Subaru EJ25D 2.5L H4 Remanufactured Engine 12/95–5/99 is designed for buyers who need a dependable replacement engine for Subaru vehicles equipped with the EJ25D platform.

Typical buyers include:

• Subaru Legacy and Outback owners
• automotive repair technicians
• independent Subaru repair shops
• fleet maintenance operators
• mechanics specializing in engine replacement

For vehicles experiencing engine wear or failure, installing a Subaru 2.5L boxer engine replacement restores reliable performance.

Key Specifications

The Subaru EJ25D 2.5L H4 Remanufactured Engine 12/95–5/99 features Subaru’s boxer engine design.

Key specifications include:

• engine type: horizontally opposed four-cylinder (boxer) engine
• displacement: 2.5 liters (2457 cc)
• valvetrain: DOHC 16-valve configuration
• fuel system: multi-point fuel injection
• engine layout: flat-four boxer design
• horsepower: approximately 165 hp
• torque: approximately 162 lb-ft

These specifications make the engine suitable for Subaru passenger vehicles designed for everyday driving and all-weather capability.

Frequently Asked Questions

What vehicles use the Subaru EJ25D engine?

The EJ25D engine was used in Subaru Legacy, Outback, and early Forester models during the late 1990s.

What type of engine is the EJ25D?

The EJ25D is a 2.5-liter horizontally opposed four-cylinder boxer engine with dual overhead camshafts.

How powerful is the Subaru EJ25D engine?

The engine typically produces around 165 horsepower and approximately 162 lb-ft of torque.

What is a boxer engine?

A boxer engine uses horizontally opposed cylinders that move in opposite directions, which helps balance the engine and reduce vibration.

Who installs replacement engines?

Replacement engines are typically installed by professional mechanics or automotive repair shops specializing in engine replacement.

12/95-5/99 Subaru 2.5L EJ25D H4. EJ25D Eng.. VIN Code 6.

Engine fitment can be verified with the notes and ‘Vehicle Fitment’ tab above, or with the casting numbers under ‘Additional Information’ (if applicable).

Every engine we sell is fully remanufactured to meet or exceed OEM specifications:

• Deep Clean – To start the remanufacturing process, every engine is fully disassembled and hot tanked (cast iron) or thermally cleaned (aluminum)
• Inspection – Magnaflux testing uses magnetic particles to inspect metal, checking for microscopic cracks and fissures that will cause long-term failure. All parts are visually inspected as well.
• Machining and New Parts – Deck surfaces are CNC machined and new parts are added. New parts inlcude bearings, pistons, rings, lifters, oil pump, gaskets, Viton™ valve seals, freeze plugs, galley plugs and either a new timing chain (with new tensioners) or a new timing belt (with new tensioner). If an engine has a timing-driven water pump, a new pump is installed.
• SIM Testing – Each engine is SIM tested after reassembly, with the cooling and oil systems being fully pressurized and the crank being spun at high RPM to verify compression and build quality.

Because of our rigorous remanufacturing process, we can offer the industry’s best warranties. Each engine comes with up to 7 years and 1 million miles of warranty, which can be upgraded to include Pure Care™ no-fault protection. No other engine manufacturer comes close.