One problem related to engine noise 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.
Several issues: 1) replace rear strut assemblies. 04/22/19. (the car seemed fine but when they put it on a lift to work on brakes mechanics saw this. 2) the the engine shimmies and feels like it is going to stall. This has gone on since 2016. This happen when going about 30 mph. I had a mechanic look at it they found nothing. It still feels like it is going to stall. 3) bearings in rear passenger side in 2017. Rear wheels were making noise when driving around 40 mph. (different mechanic looked at this. 4) right front axle shaft replaced 06/26/19 this car has never been in an accident and is used for highway driving.