i drive a 99 forester s with almost 120K miles on it. i've had the car myself only for 2.5 years and have had almost no problems with it. earlier this week, it did a weird thing-- i was driving in my neighborhood and the alarm went off-- just a couple of quick chirps & it locked the doors for me. it did this again about an hour later. my fob had been slow so i went out and bought new batteries for the fob & the extra. this didn't help-- my fob no longer activates the alarm at all. (yes, i've checked to make sure the right batteries are in the right way.)
it's been quiet until today--now it's happening again randomly, only with a greater frequency. i've looked at the book that came w/ the car but haven't found anything specifically about this weird problem.