Knock (Detonation) Sensor Honda Civic Cx, Dx, Ex, Gx, Hx, Lx, Delsol Acura Vigor, RL 1996-2004 Description: OEM Quality Aftermarket Knock (Detonation) Sensor In order to determine compatibility please refer to 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: HONDA: STANDARD MTOR: AIRTEX / WELLS: 30530P2MA01 30530-P2M-A01 30530PV1A01 30530-PV1-A01 KS65 5S2140 SU4778 *It is solely buyer's responsibility to check compatibility prior to ordering! Please 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 OE ref. codes. Year: Make: Model: 1996-2000 HONDA CIVIC HX 1996-1997 HONDA CIVIC DELSOL SI 1996-2000 HONDA CIVIC EX 1997-2000 ACURA EL 1996-2004 ACURA RL *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 sale! Payment: We prefer PayPal as a payment method; If you don't have a PayPal account you can use your credit/debit card to complete the transaction; The item ships upon complete payment. 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