Knowing which Subaru engines to avoid can save you from costly repairs and long-term headaches. The most problematic units include the EJ25 2.5L engine, found in several Outback and Legacy models, which is notorious for head gasket failures. The 2.5L turbocharged EJ255 engine also has a history of ringland failure under hard driving conditions. If you are purchasing a used Subaru or sourcing a replacement engine, consult with a trusted supplier to identify reliable alternatives. Opting for the newer FA or FB series engines is generally a safer choice. Understanding which Subaru engines to avoid protects your investment and ensures a more dependable ownership experience. You can trust Moon Auto Parts to provide you with the best quality Subaru engines. Our team carefully inspects every engine to ensure it meets high performance and reliability standards before it reaches your hands.