The knock sensor is an integral part of the modern vehicle engine management system. The knock sensor designed to detect and respond to vibrations caused by vehicle engine advanced timing detonation, known as engine knock or pinging. A fully operational knock sensor will allow the vehicle ECU to control the engine ignition timing to optimise power and fuel efficiency. The knock sensor must be compatible with the vehicle engine management system; the Tridon knock sensor range has been carefully researched and engineered to suit each specific application. As knock sensor electrical circuits, technical specifications and appearance may vary; always refer to the Tridon vehicle application list to ensure correct part number selection