Although there are a multitude of reasons why your central locking may not be working (Microswitches, actuators, fuses, previous owners attempts) there are two major flaws in the design of the E30 central locking system that often fail and contribute to 80%+ of the central locking problems people experience. The first is the internal fuse found inside of the central locking unit. The central locking unit is located behind/below the drivers side kickpanel speaker. To get to it you need to remove the kick panel which is held on by 1 Philips screw, and the two bolts holding down the hood release lever. Once the kick panel is removed, the speaker is held in by 3 screws. Once removed the central locking unit is held in by a bracket which also holds the interior light relay.   Once you open the central locking unit you will find a board inside, and in the corner of that board you will find a fuse. If the metal piece right beside the fuse is de-soldered, that means the fuse has done its job and tripped. This fuse can be resoldered with your old fashioned soldering iron to re-honor the connection/fuse. But why has … Continue reading Two of most common E30 Central locking/Power locking issues and how to fix them