The head gasket has a high failure rate due to cooling system problems. Subaru is aware of the problem and has extended the warranty to 8 years/100k miles on many vehicles.
Average mileage: 130,738 (25,000–224,000)
Engine affected: 2.5L 4 Cylinder
11 people reported this problem
Loss of coolant, over heating on hills, bubbling in the coolant fill bottle, replaced several radiators
Head gasket leak causes coolant to be depleted after driving 20 to 30 miles. Overheats. Have to stop and replenish coolant. On top of oil leaks and and noisy 4th gear, I'm scrapping it and getting something else.