Blue Print Knock Sensor (ADS77209) Fits: Subaru

The Blue Print Knock Sensor (ADS77209) is supplied in OE matching quality and maintains the high standards of Blue Print products.

The knock sensor swiftly detects engine knock vibrations, signalling the engine control module (ECM) or engine control unit (ECU). The ECM/ECU then adjusts ignition timing or fuel injection to prevent and safeguard the engine from knock damage.

All Blue Print components are developed and manufactured to meet OE specifications to be direct replacements and undergo rigorous testing and quality checks to guarantee every part is manufactured to a high standard. And you can enjoy added peace of mind with a 3-year manufacturer's guarantee for every product.