2010 2011 2012 Subaru Legacy 2.5L H4 SOHC AVCS Engine JDM EJ25 EJ253

Vehicle Specifications

• Engine Code: EJ253 (JDM Version)

• Displacement: 2.5 Liter (2,457cc)

• Configuration: Horizontally Opposed (Boxer) 4-Cylinder

• Valvetrain: SOHC 16-Valve with AVCS (Active Valve Control System)

• Timing Drive: Timing Belt Driven (Interference Engine)

Vehicle Fitments

• 2010–2012 Subaru Legacy 2.5i (BM Chassis)

Included Parts

• Complete Engine Long Block (Engine Block and SOHC Heads)

• Intake Manifold & Throttle Body

• Fuel Rails & Fuel Injectors

• Coil Packs & Spark Plugs

• Alternator, AC Compressor, & Power Steering Pump

• Water Pump & All Internal Timing Components (Belt, Idlers, Tensioner)

Installation & Notes

• USDM Swap: To ensure 100% plug-and-play compatibility with your vehicle's ECU and harness, you must transfer your original USDM intake manifold, wiring harness, and all sensors to the JDM long block.

• Timing Component Swap: It is critical to swap your original USDM Crankshaft Sprocket and Driver-Side Camshaft Sprocket. The JDM trigger patterns for the cam and crank sensors often differ; failing to swap these sprockets will prevent the engine from starting or cause persistent timing codes.

• Maintenance: Since the engine is out, we highly recommend installing a new Timing Belt Kit (belt, tensioner, idlers), Water Pump, and Rear Main Seal.