CCIYU knock sensor Fit for 30530-PV1-A01 SU4778 1996-2004 for Acura RL 3.5L,1996-2000 for Honda Civic 1.6L

A vehicle knock sensor is a sensor screwed into the engine's block or cylinder head. It is used to detect engine knock or detonation (there is a piezoelectric element inside the sensor). The signal from the knock sensor is sent to the PCM/ECM and that is used to control the engine's timing. Typically you'll have one knock sensor on each bank of the engine (one on inline 4/5/6 cylinder engines, two on V6, V8, V10 engines).Like anything else, sensors wear out, corrode, or become dirty.

Item fitment:
1996-2004 for Acura RL 3.5L
1996-2000 for Honda Civic 1.6L