ROADFAR 2 x Knock Sensors with Harness Fit for Toyota 4RunnerAvalonCamryCorollaPreviaSiennaSolaraTacomaTundraSuprafor Lexus ES300LS400RX300GS300GS400SC400OE 89615-12090 89615-12050

Knock sensor is designed to detect when the combustion in car is not being properly controlled.A knock sensor uses an internal element that is extremely sensitive to vibration and will detect when the pressure wave from the combustion hits the cylinder wall before it is supposed to.When the sensor detects incorrect noise from internals of the motor it will retard the timing in order to protect the engine.The sensor has been designed to act as if mechanic was listening to the engine and keeping an eye on the things for the driver. Notice : Please find the amazon fitment on the top of the page,enter your vehicle information to check if the item fit your vehicle Fitment: 1994-2000 for Lexus ES300 3.0L 1998-2000 for Lexus GS300 3.0L 1998-2000 for Lexus GS400 4.0L 1997-2000 for Lexus LS400 4.0L 1999-2000 for Lexus RX300 3.0L 1997-2000 for Lexus SC400 4.0L 2000 for Toyota 4Runner 2.7L 1996-2002 for Toyota 4Runner 3.4L 1995-1999 for Toyota Avalon 3.0L 1994-2001 for Toyota Camry 3.0L 1991 for Toyota Corolla 1.6L 1991 for Toyota Previa 2.4L 1998-1999 for Toyota Sienna 3.0L 1999-2000 for Toyota Solara 3.0L 1998 for Toyota Supra 3.0L 1995-1998 for Toyota T100 3.4L 1995-2004 for Toyota Tacoma 3.4L 2000-2004 for Toyota Tundra 3.4L Package Including 2 knock sensors with harness as picture show