Radiator for vehicles with replaceable fixing pin

A radiator for vehicles, comprising at least one collector tank or reservoir (10) made of plastic material which is provided with at least one projecting fixing pin (20, 46) for fixing the radiator to the structure of the vehicle and means (12, 42) for fixing a spare component (22, 46) which replaces the aforesaid fixing pin (20, 46) in the event of failure of the latter.