Knock / Detonation Sensor Nissan Altima, Pathfinder, Maxima Infiniti G20, J30, Q45, QX41991-2002 Description:New Aftermarket Knock (Detonation) Sensor In order to find compatibility please check the chart of compatible vehicles, cross-reference OEM part numbers or contact your mechanic. >>> PLEASE READ >>> CROSS-CHECK OE REFERENCE PART NUMBERS PRIOR TO ORDERING! THIS IS THE ONLY RIGHT WAY TO ORDER CORRECT PART! >>> OE Reference Codes: NISSAN: AC-DELCO: AIRTEX / WELLS: 2206030P00 22060-30P00 2206030P00A 22060-30P00A 213-1818 5S2217 STANDARD MOTOR: OTHER: KS79 144-220 WA1711 *Cross-check indicated OEM reference codes against those found on your current unit. You may call local dealership (auto parts dept.) to obtain correct part numbers or ask your mechanic. List of compatible vehicles: *Models presented for reference purpose only! In order to correctly determine compatibility you must cross-check indicated OEM reference part numbers. Year: Make: Model: Engine: 1995-1998 NISSAN 200SX , SE-R L4 2.0L 1991-1998 NISSAN 240SX, LE, SE L4 2.4L 2389cc 1989-1996 NISSAN 300ZX V6 3.0L 1993-1999 NISSAN ALTIMA GLE, GXE, SE. XE L4 2.4L 1990-1993 NISSAN D21 PICKUP, SE V6 3.0L 1998-1999 NISSAN FRONTIER L4 2.4L 1992-1999 NISSAN MAXIMA GLE, GXE, SE V6 3.0L 1991-1993 NISSAN NX L4 2.0L 1992-1999 NISSAN PATHFINDER LE, SE, XE V6 3.0L & 3.3L 1994-1996 NISSAN PICKUP, KING CAB XE, SE V6 3.0L 1993-1998 NISSAN QUEST GXE, XE V6 3.0L 1991-1999 NISSAN SENTRA GXE, SE-R, LE, SE, XE, CLASSIC L4 1.6L & 2.0L 1990-2001 INFINITI J30 & Q45 ALL 1991-1996 INFINITI G20 ALL 1997-2000 INFINITI QX4 ALL 1996-2001 INFINITI I30 ALL 1990-1992 INFINITI M30 ALL *May fit other makes-models not listed. Note: The knock sensor responds to spark knock caused by Pre-detonation of the Air&Fuel mixture. As the flame front moves out from the spark plug ignition point, pressure waves in the chamber crash into the piston or cylinder walls resulting in a sound known as a knock or ping. This is caused by using a fuel with a low octane rating, overheating, or over advanced timing. Sometimes it can be caused by hot carbon deposits on the piston or cylinder head that raise compression. A knock sensor, which serves to warn of engine knock or pinging due to a bad air/fuel mixture, can go bad. Signs that the knock sensor is bad are a sluggish engine, poor fuel economy and slow acceleration. Most of the time, the knock sensors don't fail entirely but go "soft" and create false signals. You can check the knock sensor through an electrical harness. Important: Please check compatibility prior to purchasing. Cross-check OE reference numbers presented in this description against those found on your current unit. If you are not able to locate part numbers, please call local dealership (auto parts department), provide your vehicle information and obtain correct part number(s). Feel free to contact us if you have any questions. Thank you for visiting my product!Payment:We prefer PayPal as fast and easy payment method;Credit cards are accepted through PayPal (no need to have an account);The item will be shipped once the payment is received and clearedShipping:Each item ships within 48 hours upon receiving cleared payment; Shipping time may vary depending on the destination and shipping method used;Seller is not responsible for the shipping delays;If you would like purchased item being shipped more promptly, please email us;It is absolutely buyer's responsibility to be aware of all possible duties / taxes.Terms of Sale:Any installed, used or damaged items do not qualify for a return; If item purchased by error it should be sent back for a refund, 10-15 % restocking fee may be held. Shipping costs are not refundable; If you do not agree with these terms & conditions please DO NOT buy from us; By placing a buy you are bound with all terms and conditions of this product; Please contact us prior to leaving negative feedback if you are not fully satisfied we will resolve any matter.About Us:In order to meet your expectations we work hard. Any issue can be solved. Please contact us first prior to leaving a negative feedback should you have any problems or concerns. We are conducting our business in the good will and friendly manner.Contact Us:Please do not hesitate to contact us should you have any questions or concerns. We will gladly reply all questions in the timely manner.