I have a 91 integra and i just put a 90 b16a motor in with pr3 ecu. well the knock sensor i got with it is broken. the plaster part that the plug goes into on it broke off. i have gone to auto zone, kragen, pep boys and napa but they dont carry knock sensors. so i dont know where to get one and what car to classify under. can some one help me please this is killing me. thanks.
How about the dealer?
True Dat 
Also Autozone does carry knock sensors. Shouldn’t the knock sensor be the same for any b-series motors that has one???
I would think so. They’re all 1 wire setups IIRC.