The workshop would have required about 400 Euros for a new throttle body. This product worked perfectly. The extremely restless motor operation and the constant going out of the engine have been eliminated. However, the rubber seal of the old air filter has dissolved because residues of the cleaner are advised to the air filter (Clio II). Have first installed the old filter after use, and agree to even 1 Week driven so that the wastes pass only in these old filters. After that I have a new filter used what I would have done anyway. 30 euros spent rather than 400.