you know ... for the longest time I have been trying to find out where the hell it goes. It's near the oil filter? I need to get a knock sensor ... but Honda/Acura want $150 for it and I'll be damned if Im paying that much for a part no bigger than my thumb. I've tried junkyards, but every Honda I see with a b series motor has most of the engine parts stripped. I keep looking on ebay. One will show up soon.