Speedo intermittent

[98elise]

The speedo on the MX5 dropped to zero a couple of times today, while the car was doing about 20-30mph. It happened a couple of months ago as well.

Any idea's on whats causing it? There are no other issues with he cluster so my first thought is the sensor?

[gdaybruce]

Not sure how old your car is but on my Eunos the speedo is driven by a cable from the side of the gear box. I'd check that the connections at both the gearbox and speedo ends are tight.

[98elise]

gdaybruce said:

Not sure how old your car is but on my Eunos the speedo is driven by a cable from the side of the gear box. I'd check that the connections at both the gearbox and speedo ends are tight.

Its a 54 plate Mk2.

Do they still use a cable driven speedo? I assumed these days it would be from a sensor rather than mechanical.

[MX-5 Lazza]

It will be a gearbox sensor on a 54. Quite possibly the sensor is failing.