Hitachi KNS0006 Ignition Knock Detonation Sensor

The Hitachi KNS0006 is a direct-fit replacement knock sensor engineered for vehicles where Hitachi supplies the original equipment part. When a knock sensor fails, the ECU loses its ability to detect detonation and typically retards ignition timing as a safety measure — robbing you of power, fuel efficiency, and drivability. This sensor restores accurate knock detection so the ECU can run optimal timing maps again. It's a flange-mount design that bolts to the engine block in the factory location, plugs into the stock wiring harness, and requires no adapters or modifications.

Build quality reflects Hitachi's OE manufacturing standards — the piezoelectric element and internal circuitry are brand new, not salvaged or remanufactured, which matters for a sensor that needs to deliver precise voltage signals under constant engine vibration and heat. Installation is straightforward for anyone comfortable working around the intake manifold: unbolt the old sensor, disconnect the harness, connect the new unit, and torque to spec. Plan on about 30 minutes to an hour depending on engine bay access. Once installed, clear the stored codes and the ECU will immediately begin using live knock sensor data for timing corrections.