I was just wondering, every once in a while when I shut the trunk or one of my doors when the car is off I hear this faint buzzer. Its really weird, when it does happen, it is after I close a trunk/door. Its not very loud at all, lasts like 2-3 seconds. I was just wondering what this is?

 

So, no one knows?

Btw, my civic is a '99 Ex

 

I have a 99 LX, but I have never heard of that. I'll listen tomorrow morning and see if mine does it.