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Speedo Failure 325i e30

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e21Keith
E21 Fanatic
Posts: 291
Joined: Sun Jan 05, 2014 7:44 pm
My E21(s): '81 323i Manual

Speedo Failure 325i e30

Post by e21Keith » Wed May 15, 2019 7:50 pm

The speedo on my e30 has been intermittent since I bought the car 5 years ago. Having owned many e30s over the years I thought it would be an easy fix, normally it's the cable to the speed sensor on the diff which has corroded. This improved things but it wasn't a fix.

All the information on the interweb talks about the odometer failing due to damaged gears, but my problem was that both the odometer and the speedometer didn't work, consequently the cruise didn't work either. I checked for dry joints on the PCB, cleaned everything I could find, no improvement. I've lost count of the number of times I've had the cluster in and out of the car and dismantled it.

Finally I came to the conclusion that the problem must be internal to the speedo head itself, I really didn't want to change this as I wanted to keep the mileage correct. After much more internet scouring I found an item on correcting the mileage, so today I have fitted a replacement speedo with exactly the same mileage as the one I removed.

Success at last!



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Jeroen
Site Admin
Posts: 25395
Joined: Tue Sep 14, 2004 12:23 pm
My E21(s): '81 323i Baur
Location: The Netherlands
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Re: Speedo Failure 325i e30

Post by Jeroen » Wed May 15, 2019 9:58 pm

:thumbsup :thumbsup :thumbsup :thumbsup :thumbsup
Regards/groeten, Jeroen

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