I Have a 2000 Civic EX. but i'm running a b16 si ecu. I keep getting a cel for the knock sensor. But I dont know which one to buy. there are two different part numbers. Does anyone know which I should buy??? Thanks

 

take the old on off and bring it in to the local automotive parts store for comparison, or call the dealership and have them give you the OE honda part number. Then cross reference it to another brand.