Overview

2002-2004 Infiniti Q45 (Liter: 4.5 & Engine(cc): 4494 & Cylinder: 8 & Block: V | Note: To 05/2004); 2002-2004 Nissan Altima (Liter: 3.5 & Engine(cc): 3498 & Cylinder: 6 & Block: V | Note: To 01/2004); 2002-2004 Infiniti I35 (Liter: 3.5 & Engine(cc): 3498 & Cylinder: 6 & Block: V); 2000-2003 Nissan Maxima (Liter: 3.5, 3.0 & Engine(cc): 3498, 2988 & Engine(ci): 182 & Cylinder: 6 & Block: V); 2001-2002 Nissan Pathfinder (Liter: 3.5 & Engine(cc): 3498 & Cylinder: 6 & Block: V | Note: To 07/2002); 2001-2003 Infiniti QX4 (Liter: 3.5 & Engine(cc): 3498 & Cylinder: 6 & Block: V); 2003-2004 Infiniti M45 (Liter: 4.5 & Engine(cc): 4500 & Cylinder: 8 & Block: V); 2003-2004 Infiniti G35 (Liter: 3.5 & Engine(cc): 3498 & Cylinder: 6 & Block: V | Note: W/o ECM Hardware Type-VP3); 2000-2001 Infiniti I30 (Liter: 3.0 & Engine(cc): 2988 & Engine(ci): 182 & Cylinder: 6 & Block: V)

The knock sensor is able to detect mechanical stress and produces a voltage when the car knocks or pings. Under heavy acceleration, it sends signals to the ECU and the ECU retards the ignition timing to compensate for the knocking, which in effect protects the pistons and rings from damage. Knocking also occurs when using low-grade fuel and having the knock sensor allows you to use different grade fuels without causing engine damage.

Warranty and Notice

36,000-miles/3-years

Click Here for California Proposition 65 Warning.

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