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Central Locking Module

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Central Locking Module

Post by Ash635 » Tue Jun 02, 2020 12:02 pm


Can someone advise me of the location of my central locking module on my 635csi 1989. The central locking has stopped operating recently. I have replaced the fuse no 27. Any help would be appreciated.


1989 635csi Highline

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Re: Central Locking Module

Post by 86_6series » Tue Jun 02, 2020 2:44 pm

Central locking starts on page 5126-0, page 56 of pdf.
Location is page 7000-6, figure #4, page 142 of pdf. ... Manual.pdf

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Re: Central Locking Module

Post by Candycj1 » Sat Jun 06, 2020 11:31 am

The module itself is accessed through the glovebox - open the box and pull out the plastic pins securing the straps either side and lower it down, then unclip the vinyl panel from the back of it. On the right you should see a black plastic cover retained by 2 small screws - these secure the cover to the c/l module behind through an L-shaped metal bracket that in turn screws into the bulkhead above - remove the screws and cover to get to the module (no need to remove the bracket).

I actually just this morning swapped mine over (11/87 production date) as my locking hasn't worked since i bought the car 2 years ago - now working perfectly thanks to a £30 2nd hand replacement via ebay (at that price i didn't even bother troubleshooting the old one...). Note - apparently you shouldn't disconnect / connect the module with the battery connected.

Here's my original and replacement - original is the newer looking one on the right (note someone damaged the case of the old one removing the connector - watch out for the plastic retaining lug; mine came out fine by pushing this down when unplugging). The old one has the same part # (61311380302) but is additionally stamped '101' and '287' whereas the replacement says 201 and 288. Minor difference in the cases too but it seems to function perfectly, interested to hear if anyone knows of material differences (i think the same part was used on the e23 and e30 too so bound to be some minor revisions over time).

Also - anyone know if these are serviceable? Per the pic the old one has no visible signs of damage (i.e. no scorching or water ingress) but i've not opened it up to inspect. Its going into the bin unless anyone here wants it...

Nice to see a fellow Londoner on here btw Ash :D


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Re: Central Locking Module

Post by Ash635 » Mon Jun 08, 2020 6:55 pm

Thankyou both for your replies.

James, the step by step guide as to how to find and remove the module was very much appreciated. It was a bit tough to remove but I managed to remove it after a brief struggle.

Kind Regards

1989 635csi Highline

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Re: Central Locking Module

Post by Sbeaud » Tue Sep 15, 2020 10:17 pm

Jumping on this thread for some feedback.

Having trouble with the central locking on my 1988 US M6. Putting feelers out for a new module, but wanted to check if I’m reading the wiring diagram correctly. The locking was working fine - all positions could control the central lock/unlock function. Then suddenly no lock could control the central lock/unlock. But a couple times since it has worked, at least from the driver’s door. As part of testing the system: is it correct that if I put a jumper between terminals 2 and 3 the whole system should unlock?


BMW wiring - Central Locking.jpg
BMW wiring - Central Locking.jpg (151.88 KiB) Viewed 45 times
1988 M6

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Re: Central Locking Module

Post by Caribe Turf » Thu Sep 17, 2020 3:08 pm

see attachments
central lock.pdf
(384.92 KiB) Not downloaded yet
cental.jpg (258.18 KiB) Viewed 15 times
2000 BMW Z3
1991 BMW 318is
1987 BMW M6
1980 320i

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