The 2010 Subaru Legacy comes standard with a 2.5-liter naturally aspirated four-cylinder boxer engine, producing 170 horsepower and 170 lb-ft of torque. This horizontally-opposed engine design provides a lower center of gravity for improved handling and stability. The engine features dual overhead cams, 16 valves, and Subaru’s Active Valve Control System (AVCS) for optimized performance across the RPM range. All Legacy models come standard with Subaru’s Symmetrical All-Wheel Drive system, making it capable in various weather conditions while maintaining good fuel economy ratings of approximately 23 city/31 highway mpg.

The 2010 Subaru Legacy shares most parts with the 2010-2014 fifth-generation Legacy models, as this generation underwent a complete redesign in 2010. Engine components, transmission parts, suspension pieces, and many body panels interchange within this generation. Some interior components and electrical parts may also fit 2015-2019 sixth-generation models, though body panels and some mechanical components differ. The 2.5L naturally aspirated engine in the 2010 Legacy shares many components with other Subaru models from 2009-2014 including the Forester and Outback. However, parts from pre-2010 Legacy models generally do not interchange due to the complete platform redesign.

Parts availability changes daily. Call us at (603) 392-7313 or visit our online shop to check current inventory from this specific vehicle. If we have sold a part you need, our Parts Broker service can source it from our network of partner yards nationwide.

Yes! We ship parts from this vehicle and our entire inventory nationwide. Most orders ship within 1-2 business days via FedEx or freight carriers for larger components like engines and transmissions. Call (603) 392-7313 for a shipping quote on any part.

The 2.5L naturally aspirated boxer engine in the 2010 Legacy is generally reliable when properly maintained, though it has some known issues. The engine is less problematic than Subaru’s turbocharged variants but can develop head gasket leaks and oil consumption issues over time. Regular oil changes every 3,000-5,000 miles are crucial, and owners should monitor oil levels closely due to potential consumption problems. The timing chain design eliminates timing belt replacement concerns, and the engine typically runs well beyond 200,000 miles with proper care. Key maintenance includes regular coolant changes to prevent head gasket issues and using the correct oil viscosity to minimize consumption problems.