This knock sensor fits select 1987-2015 Infiniti, Mercury and Nissan applications and detects the vibration frequencies of engine detonation so the engine computer can retard ignition timing.

Walker Products 242-91024 Knock Sensor Features:

• Fits 1990-1992 Infiniti M30; 1990-2001 Infiniti Q45; 1991-2002 Infiniti G20; 1993-1997 Infiniti J30; 1996-1999 Infiniti I30; 1997-2000 Infiniti QX4
• Fits 1993-1998 Mercury Villager, Nissan Quest; 1987-2000 Nissan Pathfinder; 1989-1996 Nissan 300ZX; 1990-1994 Nissan D21; 1991-1998 Nissan 240SX; 1991-1993 Nissan NX
• Also fits select Infiniti, Mercury and Nissan applications
• Female rectangle electrical connector with 2 blade terminals
• 44.8 mm (1.8 in.) overall length
• Mounting hardware not included