Does the opel corsa have a knock sensor?

Yes, the Opel Corsa has a knock sensor. The knock sensor is a device used to detect the occurrence of knocking in a spark-ignition engine. It is typically mounted on the engine block and consists of a piezoelectric element that generates an electrical signal when it is subjected to mechanical vibrations. The signal from the knock sensor is used by the engine control unit (ECU) to adjust the ignition timing and fuel injection in order to prevent the engine from knocking.