Description: Location: The Knock sensor is located on the engine block and in some applications under the intake manifold. The Knock sensor generates an AC voltage created from the frequency of poor combustion in the engines combustion chambers. A mechanical fault within the motor creating a rapping sound may create false signals from this sensor. Ignition timing and the air/fuel ratio are adjusted to compensate for this condition. Failure Symptoms: Malfunction Indicator Light (MIL) illumination, failed emission test, pre-detonation or “ping ”, increased emission levels, low engine power. Part Number: 89615-20010 8961520010 Fits for Lexus ES300 / Toyota 4Runner / MR2 / Celica / Pickup. Specification: Diameter: approx. 30MM Length: approx. 45MM Material: Metal and plastic Other Part Number: 89615-12050, 89615-32010 For Lexus LS400 (1990) For Toyota 4Runner (1991-1988) For Toyota Celica (1991-1988) For Toyota MR2 (1991) For Toyota Pickup (1991-1988) Package Includes: 1 Piece Knock Sensor Note: Please allow 0.5-1 inch difference due to manual measurement.(1 inch=2.54cm) Please check the size measurement and the picture carefully before making payment. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Please understand,Thank you
