Our 2003 Forester has been maintained by our dealer since purchased new in late 2002.
From day 1 it has had a coolant leak, a fact that has been pointed out to the dealer at every scheduled service.
The dealer, of course, could not find the source of the coolant lead until after the warranty expired, whereupon we were told that the head gaskets were leaking and the car had developed piston slap to the point where driving the car was ill-advised.
The master tech told me that Subaru has told dealers to ignore the problem until the warranty expires.
Last Subaru I will ever purchase; this was our 7th.