The Bosch Knock Sensor - 0261231146 is a high-quality sensor designed to detect engine knock or detonation in a vehicle's engine. It is a crucial component in the engine management system, providing accurate readings to the engine control unit (ECU) to adjust the ignition timing and prevent engine damage. This knock sensor is compatible with a wide range of vehicle makes and models and is made with durable materials for long-lasting performance. It is a reliable and essential part for maintaining the health and efficiency of a vehicle's engine.