525i 1992 Speedometer and RPM meter problem when cold outside

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Marcel Vollebregt - 10 Nov 2006 08:46 GMT

Hello all,

I've a problem with my '92 525i when the tempratures outside drop to around
freeze point. The speedometer and RPM meter start jumping around, or stay at
20km/h 500 rpm. When the car has heated up and I stop it for 2 minutes or so
the problem is gone.

Does somebody know what the problem could be?

Thanks and best regards,
Marcel, currently at 341K km.

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JB - 10 Nov 2006 09:05 GMT

> Hello all,
>
[quoted text clipped - 4 lines]
>
> Does somebody know what the problem could be?

Replace the 2 'AA' nicad batteries on the dashboard printed circuit board.
Fairly well documented procedure.

JB

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Bob - 10 Nov 2006 18:00 GMT

> Hello all,
>
[quoted text clipped - 7 lines]
> Thanks and best regards,
> Marcel, currently at 341K km.

It may be the bearings in the gauge not being lubricated well enough.
It's a major pain to pull them and drop in a little oil but that may be
what it needs. I had a similar problem with my speedometer for a while
but it seems to have cleared itself.

Bob

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Marcel Vollebregt - 30 Nov 2006 09:02 GMT

Hello all,

I didn't find any batteries inside my dashboard.
I did the following thing: http://home.online.no/~st-arhol/enge32speedo.htm

I replaced all electrolytic capacitors (6 in total), one measured bad the
one close to the orange capacitor/transistor, not at the regulator.

It has not happended yet, so if it won't happen again troughout the winter.
It's the fix.

Best regards for the response!

> Hello all,
>
[quoted text clipped - 7 lines]
> Thanks and best regards,
> Marcel, currently at 341K km.

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