Hello mecmoch, for the golf, in the water box (which has been sewn on the right side of cylinder head), it carries two sensors, well, the one that wears four poles in the tab, is the probe that is responsible for determining temperature to the ECU, it is of the type NTC I think, in case you want to check, when it fails, or drown hot, or it goes badly at start You will see that it does not mark temperature in the painting, I Acho que é sua única função, que, o último não tem nada a ver com a vagem. Espero ter ajudado você, saudações !!