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What is the engine code for a 2010 Subaru Forester?

The engine code for the 2010 Forester depends on the trim: the standard 2.5-liter models use the EJ25 family (commonly seen as EJ25D or EJ253 in various records), while the turbocharged Forester XT uses EJ255.


In this article, we break down the engine codes by trim and market, explain how to read the code on your engine, and note variations you might encounter. This helps you identify the exact engine variant on a specific vehicle.


Engine options in the 2010 Forester


Below is an overview of the two main engine configurations you would typically find in the North American 2010 Forester lineup.



  • Naturally aspirated 2.5-liter flat-four (non-turbo): part of the EJ25 family, commonly documented as EJ25D or EJ253 in various service guides and records.

  • Turbocharged 2.5-liter flat-four (Forester XT): engine code EJ255, used in the turbocharged variant.


In summary, the base Forester’s engine code is drawn from the EJ25 family, while the turbocharged XT carries EJ255. Market and production variations can affect the exact suffix or designation you see.


Where to find the exact engine code


To confirm the precise engine code on a given 2010 Forester, check the stamping on the engine itself and cross-check with the vehicle’s documentation.


Reading the code on the engine block


The engine code is usually stamped on the engine block or near the valve cover. Look for a designation such as EJ25D, EJ253, EJ25, or EJ255, with a suffix that may indicate a revision. The exact format can vary by year and market.


Other sources to verify


If you’re unsure from a quick check, use the VIN to decode the original engine configuration or consult a Subaru dealer or service manual for your specific vehicle. These sources can confirm the exact engine code tied to your VIN and market.


Notes on market variations


Subaru sometimes used slightly different suffixes or codes for the same engine family in different regions. European or other markets may show small variations in labeling. Always verify against the vehicle’s VIN, window sticker, or owner’s manual.


Bottom line and summary


The 2010 Forester’s engine code is not a single universal value; it depends on the model. The standard 2.5-liter Forester typically uses an EJ25-series engine (often noted as EJ25D or EJ253 in various records), while the turbocharged Forester XT uses EJ255. For absolute certainty, check the engine block stamping or decode the VIN through a dealer or service manual.


Summary: In 2010, Forester base models used the EJ25 family of engines, with EJ25D/EJ253 designations in many records, and the turbocharged XT variant using EJ255. Always verify with the engine block stamp or VIN for your exact vehicle.

Kevin's Auto

Kevin Bennett

Company Owner

Kevin Bennet is the founder and owner of Kevin's Autos, a leading automotive service provider in Australia. With a deep commitment to customer satisfaction and years of industry expertise, Kevin uses his blog to answer the most common questions posed by his customers. From maintenance tips to troubleshooting advice, Kevin's articles are designed to empower drivers with the knowledge they need to keep their vehicles running smoothly and safely.