Hi, bought a new coolant temp sensor (green 1) where in the engine do i take the old one out and put this one in?

Look at the hoses down the right hand side of the engine (take the side plastic cover off which runs along the inlet manifold) and youll see it sticking upright on a coolant hose.

As above 5 minute job. Don't undo coolant cap and you will lose very little coolant.

When I changed mine on my TDI, I found it really difficult to get the wiring loom plug off, so I did the following:

- put o-ring onto new CTS

- pulled out retaining clip

- removed old CTS and ensured the o-ring came out too

- inserted new CTS (and o-ring)

- reattached retaining clip

- unclipped the old CTS from the loom

- reattached the plug to the new CTS

Coolant lost was next to nothing

just did mine,took longer to open toolbox and get the screwdriver out than do the job

is the green sensor the one that sends the temp to the gauge in the dash??

Yes as well as the ECU.

Is this to cure the rough cold running problem? If so, I think I need to do this myself.

I need to change mine, what part number did you get??

Sorry just noticed your is a mk2

Edited 26 October, 201015 yr by Vrs me

mark 1 mate, 02 plate is what i meant by 02 vrs.

cant remember the part number, just goto gsf and get the one that costs a bit more. about £28 I think, it will be a green one.

Its likely the GSF one will be Hans Pries make (German), so this is it at a lot cheaper price.

http://cgi.ebay.co.uk/AUDI-RANGE-DOUBLE-TEMPERATURE-SENDER-COOLANT-SENSOR-/170374698151?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item27ab1f94a7

Edited 26 October, 201015 yr by Liverpool-Lad