SCITOO Knock Sensor Harness Fits for Lexus: ES300,GS300,RX300,for Toyota: Avalon,Camry,Highlander,Sienna,Solara Replaces OE #: 82219-33030 82219-07010 Fits select: 2000-2002 TOYOTA SIENNA LE/XLE

A knock sensor is like a small electronic microphone that is usually attached to the engine block and listens for a couple of things that a engine might do. One thing it listens for is pre-ignition or knocking inside the engine usually caused by a few issues including dirty gas, wrong engine timing low octane fuel, wrong air / fuel mixture, and also by the wrong spark plugs. It also listens for engine run on which happens when the vehicle is turned off, but tries to keep running until it stalls. Once a noise is detected, the knock sensor sends a signal to the cars computer which in turn will retard the timing at 2 degree intervals until it corrects the issue. If the knock sensor fails, it can seriously damage the engine, as continuous pre-ignition could cause melting or fractures in the pistons just to name a few.

Fit for
1997-2003 for Lexus ES300 3.0L
1998-2000 for Lexus GS300 3.0L
1999-2003 for Lexus RX300 3.0L
1995-2004 for Toyota Avalon 3.0L
1994-2006 for Toyota Camry 3.0L
2001-2003 for Toyota Highlander 3.0L
1998-2003 for Toyota Sienna 3.0L
1999-2003 for Toyota Solara 3.0L