This is a picture of when I first bought my car. At the top of the the front pillar there is a small black cylinder that is wired into the car. I never figured out what it was. Assuming it was some old factory alarm component.
But I was looking at the picture from Komodo's car. and he has the same exact thing in his car. My car is a 1995/1996 318i his car is a 1998 328i. What is it? and What's the connection?