I have a 90 525i, driver's side door lock does not work from outside car while trying to unlock. When key is inserted into door and turned to the unlock position, I hear all doors click, but doors do not unlock. I do the same on the passenger side, and the locks open for 1 sec. and goes back to lock position again. In order to enter the car after locked: I turn key to unlock on passenger side while lifting door handle quickly before locks go down again. I now have to enter car on passenger side and pull up the driver's side lock from the inside. Now, the car is unlocked and all locks remain unlocked. This problem is driving me crazy. I've had the door all apart. Nothing was disconnected, loose, or broken. I thought maybe a push/pull rod or something was disconnected, but not the case. Dealership parts guy says it "MAY" be the lock activator, but could be in any of the doors and they are all different. So, at $200. a pop, I'm not about to try this on a maybe. Has anyone had this problem that can help me???? Any ideas????