One problem related to alternator/generator/regulator has been reported for the 2015 Subaru Forester. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2015 Subaru Forester based on all problems reported for the 2015 Forester.
I was driving on city streets (speed limit 45mph) to run simple errands when the check engine light came on. I immediately turned around to go home which was just a minute or two away. As I sat at a traffic light, I realized the engine was idling a bit rough. The check engine light remained on. I parked the car in the garage and spoke with Subaru as well as our mechanic at new dimensions automotive. Apparently, Subaru had issued a mechanics notice to be aware that alternator problems existed. We ultimately had the repair completed at new dimensions on 8/6/19 in the amount of $877. 53. Our mechanic suggested that this mechanical issue may well become a recall, and to keep our receipt for just that reason.