how hard/ expensive is it to change the mircoswitch?

Quote Originally Posted by pcross
Here is a re-run of a reply to the same type of problem I posted to a week ago: One of the microswitches in the system is not being read as "closed" by the computer. I had the exact same problem of locking and an immediate unlock. Here's what I found: I visually checked the microswitch in my driver's door (1994 525i) and saw that the constant opening and closing of the door over the years had worn down the contact bar on the switch. It's very easy to see if you eyeball it close in good light. As a temporary fix (which really has become permanent - I'm lazy), I cut a strip from an old, thin plastic card, slipped it over the switch bar and duct-taped it into place. Now when I close the door, the microswitch closes fully and the problem is gone. Observe the driver's door first. It gets the most open/close action over the years. Then check all of the doors for worn-down micro-switch buttons. You'll be surprised at what you find.