Intermittent Speedo

[STCaulkin]

Hi, I have a 53 plate 172 Cup.

Recently my speedo has started to become a bit intermittent. I took it to a mechanic who said it is one of two things, either the instrument panel or a sensor located in the engine bay (he showed me but I know nothing about cars).

Has anyone else had this problem and is it more commonly one or the other?

Thanks

 

[krappy]

Dodgy speedo sensor - located on the rear of the gearbox, down the back of the engine. Not very expensive and easy to change yourself - just yank out the old one and push in the new one

 

[kaz_quiksilver]

I had his too , got worse over time . Bought a new speedo sensor from renault for around £20 . Job done

 

[The_Pirate]

As above, do it when its cold though, or do what I did and take a layer of skin off the back of your hand lol.

They're around £19 from Renault AFAIK.

 

[krappy]

As above, do it when its cold though, or do what I did and take a layer of skin off the back of your hand lol.

Ha! Yes this - the sensor is right near the exhaust manifold so as said best to do it when the engine is cold.

The sensor also has a small silver heatshield clipped around it so make sure you put that back on the new one...

 

[The_Pirate]

Another thing, its a lot easier to pull it out with a pair of grips (once you unplug it) saves you actually pulling like a man with no arms to get It out!

 

[STCaulkin]

Thank you all! Speedo sensor it is then. Am I right in thinking that it is located behind the engine and down in the middle, almost under the bottom middle of the windscreen?

 

[The_Pirate]

I'll get a picture for you buddy

 

[The_Pirate]

Heres two, looking down the side of the coolant bottle;

I'm pointing at the sensor with a screw driver;

Hope this helps fella!

 

[Cub.]

There are also photos and advice that I put in here;

http://www.cliosport.net/forum/showthread.php?715192-Stroppy-Speedo

I'd suggest giving it a clean and trying it before buying a new one, may just have some gearbox oil on it.

 

[STCaulkin]

Cheers guys, very good of you!