The 2011 Subaru Legacy comes standard with a 2.5-liter naturally aspirated SOHC flat-four engine, producing 170 horsepower and 170 lb-ft of torque. This horizontally opposed boxer engine features aluminum construction with cast iron cylinder liners and is known for its low center of gravity, contributing to the Legacy’s balanced handling characteristics. The engine utilizes a timing chain rather than a belt, reducing maintenance requirements. It’s paired with either a 6-speed manual transmission or Subaru’s Lineartronic CVT automatic transmission, with standard all-wheel drive across all trim levels.

The 2011 Subaru Legacy shares most parts with the 2010-2014 fifth-generation Legacy models. Engine components, transmission parts, suspension pieces, and body panels are largely interchangeable within this generation. Some electrical components and interior trim pieces may have minor variations between model years due to mid-cycle updates. The 2.5L engine in particular remained consistent throughout this generation, making engine parts highly compatible. However, always verify part numbers when sourcing components, as running changes and option packages can affect compatibility even within the same generation.

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 engine in the 2011 Legacy is generally reliable but has some known weaknesses. The most significant concern is head gasket failure, which typically occurs between 100,000-150,000 miles and requires expensive repairs. Oil consumption can also be problematic on some units. However, with proper maintenance including regular oil changes every 3,000-5,000 miles and coolant system service, these engines can provide dependable service well beyond 200,000 miles. The timing chain design eliminates belt replacement concerns, and the boxer configuration provides smooth operation and longevity when maintained properly.