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Adventure speedometer overhaul

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Created on July 29, 2025

Reading time 10min

Written by:

Emanuel Zifreund

Photos:

Emanuel Zifreund

35

Gisbert Marx

1

Emanuel Zifreund

35

Gisbert Marx

1

Erster optischer Check – Tachoüberholung

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Baujahr klar erkennbar – Tachoüberholung

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Perfekt ablesbar – Tachoüberholung

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VW 411 Kombiinstrument – Tachoüberholung

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Ein Zahnrad kommt selten allein – Tachoüberholung

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Gleich gehts los – Tachoüberholung

Bild von Partner Porsche AMAG November Foto-Galerie 2025

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Geschwindigkeitsanzeigentest – Tachoüberholung

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Werkstattausstattung – Tachoüberholung

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Vorsichtige erste Schritte – Tachoüberholung

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Tacho jetzt ohne Glas – Tachoüberholung

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Aus dem Gehäuse raus – Tachoüberholung

Bild von Partner Planai Classic 2025 Inline 1

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Noch mit Tachoscheibe und Zeiger – Tachoüberholung

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Gut dass ich das nicht machen muss – Tachoüberholung

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Die Tachoscheibe kommt weg – Tachoüberholung

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Es geht ans Eingemachte – Tachoüberholung

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Gleicher VDO Aufkleber wie am Gehäuse – Tachoüberholung

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Inspektion der Elkos – Tachoüberholung

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Weiter gehts – Tachoüberholung

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Ausbau der Elkos – Tachoüberholung

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Einlöten neuer Elkos – Tachoüberholung

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Fingerspitzengefühl ist gefragt – Tachoüberholung

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Toleranztest – Tachoüberholung

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Reparaturvermerk im Inneren – Tachoüberholung

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Bald wieder fertig – Tachoüberholung

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Anbringen des Tachoringes – Tachoüberholung

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Fertig für den Einbau – Tachoüberholung

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Finaler Abschlusstest – Tachoüberholung

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Auch ich bin bald wieder ein Tacho – Tachoüberholung

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Tachoscheiben warten auf ihren Einsatz – Tachoüberholung

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Bald wieder im Einsatz – Tachoüberholung

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Es gibt viel zu tun – Tachoüberholung

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Birnchencheck – Tachoüberholung

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Kaum mehr lesbar – Tachoüberholung

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Links die Ursache des Übels – Tachoüberholung

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Wirbelstromprinzip – Tachoüberholung

Summary

When the speedometer fails on a Porsche 911 Carrera (993), the search for spare parts or repair options begins. The author of this feature had to experience this first-hand (or at least on his own car). But he found the right solution.

This article contains the following chapters

When the speedometer goes on strike
The last hope
The speedometer is dismantled
Tired capacitors
Precautionary measures
Reassembly
Spare parts shortage
How does a speedometer actually work?

Estimated reading time: 10min

Preview (beginning of the article)

When the timer for the auxiliary heating failed in my VW 411 LE Variant in 1984, it was no problem to find a replacement. Off to the scrap yard, remove a used clock, pay at the exit and the matter was off the table. Today it is no longer that simple. You can no longer find gauges from bygone days either at the car recycler or at your trusted dealer. The manufacturers themselves generally offer neither spare parts nor repairs. Instrument failure is often also relevant for the TÜV. Without a speed display, the points account is also quickly filled in case of doubt. In other cases, for example when the trip odometer fails, it is above all a nuisance. It is important to everyone that the odometer works. At least most of us do. Okay, let's agree on many. There are also some people for whom the odometer is more convenient when it comes to selling their car - but I'm getting off the subject.

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