SCITOO Knock Sensor with Harness Fit for Nissan 200SX 240SX 300ZX Altima D21 Maxima NX Pickup Quest Sentra,for Infiniti G20 I30 J30 Q45 QX4,for Mercury Villager,2Pins,KS79 22060-30P00

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About SCITOO Knock Sensor With Harness Fit For Nissan

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.Comes as a SET of 1(1) - Knock Sensor with HarnessReplaces dealer part numbers: 22060-30P00, 90-2000Fit for1995-1998 Nissan 200SX1991-1998 Nissan 240SX1990-1996 Nissan 300ZX1993-2001 Nissan Altima1990-1994 Nissan D211995-2004 Nissan Pickup1987-2000 Nissan Pathfinder1993-1998 Nissan Quest2000-2004 Nissan Xterra1991-2001 Nissan Sentra1990-2001 Infiniti Q451991-2002 Infiniti G201996-2001 Infiniti I301993-1997 Infiniti J301997-2000 Infiniti QX41993-1998 Mercury Villager