Thanks for the info, VDCdriver. I didn’t know Subaru had a McIntosh audio option. That’s rather impressive. It must make long trips more enjoyable.
The manual for my '96 Legacy doesn’t mention a security code, nor does my Haynes manual, but the Forester in question is ten years newer.
The person who owns this Forester, like many others, is, sadly, not inclined to read the manual, and the car is too far away for me to check. Her vehicle is the base model as far as I can tell. 2.5L non-turbo engine, automatic, steel wheels, radio w/single CD player. Nothing fancy.