One problem related to engine rattling and whining sounds has been reported for the 2013 Subaru Impreza. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2013 Subaru Impreza based on all problems reported for the 2013 Impreza.
Vehicle will not start after an extended period of attempts. Appears to happen most often when vehicle is parked (either indoors or outside) for more than several hours. Car will crank over for 10+ seconds and will not start. After multiple attempts, car has started eventually. Have communicated with dealer and sia offices that I have noticed the car will make whirring noises that come from the back rh side of vehicle - and also a clicking noise near center of dash when turned off and sitting. This will go on for over 5 minutes at a time, which must drain battery since car is not turned on or engine running. Was told by dealer that this is the emission system "purging" itself - and is considered normal for this vehicle. Sia offices confirmed this and also stated that nothing is noted in the current owners manual which explains this feature. My concern is that the car is unable to start when required to - and am guessing that it might be related to this unusual feature. . . . Regardless of origin, safety issue with car not starting and being ready to operate when normal starting procedures are followed.