Knock Sensor Knock sensor detecting combustion knock so ignition or injection timing can be corrected LEMARK "LKS006" - Not availablePEUGEOT - 406, 306, 806, 407, 605; CITROËN - C5, XM; RENAULT - Laguna, Clio; LANCIA - Zeta, Phedra; FIAT - Ulysse