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Relocating E30 Central locking to fix moisture problems once and for all

April 12, 2020

A few years ago I wrote about common problems with the E30 central locking and how to fix them.

Two of most common E30 Central locking/Power locking issues and how to fix them

Well, its time to revisit the topic, because I have figured out the once and for all solution.

You see, even with the best efforts to keep the central locking dry, this happened to a friend after he pressure washed his car:

The reason for this is poor design by BMW, they put the central locking in an area partially exposed to the elements (for details reference first link in this article).

So for my personal car, I decided to completely relocate the central locking and lighting relay to under the dash, attached via heavy duty velcro.

The only thing required is to pickup a central locking harness with as much wire as you can cut back from a donor car. Cut your current connector off and use the extra length of wire from the donor car to splice it in color for color. There is a valley behind the kick panel by the speaker that has plenty of room to run the wires up to under the dash. This route already runs other wires from under the dash, so it wont look out of place and is purpose built for that application.

No more wet central locking!

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