Sorry for bumping this with my first post. I think my T reg (99) 8V 214i is suffering from the same problem as the OP's car. My 8V 214i came with factory fitted central locking (also has no lock on the passenger side).
The problem started with the central locking fuse blowing all the time. Then the power kept cutting out on the car. At times, it would just die for no reason when parked up. Sometimes, it would even cut out as I was driving along. It would sort itself out when I pushed the fuse box down. Having taken the fuse box off and cleaned up the connector blocks, the power cut out problem has been solved (and was probably a completely separate issue to the central locking problem). Then the boot wouldn't unlock at all - with the central locking or with the key (key wouldn't even turn in the lock). Copious amounts of WD40 sorted this out. The boot lock has always been a bit dodgy, mind - sometimes it would work with the central locking, sometimes not. Yesterday, the central locking packed up completely. Even using the key doesn't make the CL work. All doors have to be locked/unlocked individually. The boot stopped locking at the same time as the CL breakdown (but sorted that out today, as the lock mechanism was sticking). The CL fuse is fine. The alarm and immobiliser are working fine with the key fob. The wiring loom on the boot is fine.
So, what next? Attack the central locking motor in the driver's door? Having looked on Ebay, I see that all the doors have central locking motors. How can I be sure which one's given up the ghost? Any ideas?
Last edited by Shamaniac; 10-10-2008 at 17:57.