Two problems related to starter have been reported for the 2015 Subaru Outback. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2015 Subaru Outback based on all problems reported for the 2015 Outback.
Battery discharging/not properly charging. Replaced with new battery in 2017 at dealer's recommendation. New battery continues to not store charge/discharge, including when the car is parked at a store or a parking for brief periods of time. This poses serious safety concerns, as I have no idea when and where my car would not start. This has occurred in excess of 20 times in the last 3 years, and I am forced to frequently replace the battery and to always have a jump starter in the car.
After being parked outside overnight with temperatures below 0 degrees f, the vehicle started fine the following morning but had numerous warning lights illuminate (power steering, at oil temperature, among others) while idling in my driveway. Vehicle warmed up for 5 minutes. Once warmed up, owner turned the vehicle off and attempted to restart 20 minutes later. Vehicle would not restart but other electrical components (lights, radio, etc) worked but the starter would not engage. Vehicle towed to dealership for diagnosis of what appears to be an electrical problem.