The Subaru boxer engine replacement cost typically ranges between $1,500 and $5,000 depending on whether the engine is used, remanufactured, or rebuilt. A used Subaru boxer engine generally costs less, often falling between $1,500 and $2,500, while labor charges can add another $1,000 to $1,500 depending on the workshop. The horizontally opposed design of the Subaru boxer engine makes installation slightly more labor-intensive compared to conventional engines. Model year, engine variant, and regional labor rates all influence the final cost. Sourcing a low-mileage used Subaru boxer engine from a reputable supplier can significantly reduce overall replacement expenses. Moon Auto Parts offers affordable used Subaru boxer engines with verified mileage to help manage your total replacement cost.