Is it expensive
Throttle body is likely imo, sounds like its stripped the plastic gears in the motor housing.
that would be great cheers I'd pay for it. If it is that will it show on diagnostics machineDIY 30 mins tops 15 if you know what your doing, second hand one £40 I have a couple of spare at work if you need one I'll dig one out. Same as 172 by the way.
or look on ebay
http://cgi.ebay.co.uk/clio-172-thro...arts_Vehicles_CarParts_SM&hash=item35a755ee7a
http://cgi.ebay.co.uk/02-RENAULT-CL...arts_Vehicles_CarParts_SM&hash=item3ca99f530c
I'll take a stab in the dark guess at oxygen sensor. Sounds like a similar problem to what I had ages ago with my 182.