Knock Sensor Knock sensor detecting combustion knock so ignition or injection timing can be corrected CSV "CSD9047" - Not availableBMW - 3 (E91, E92), 5, X3, 1 (E81, E87), 6; NISSAN - NV400, X-Trail; MITSUBISHI - Carisma; OPEL - Movano B, Vivaro A