Originally Posted by hondatech

I have used the bosch one that's cheapo, the splicing the wire one. It seemed to work but I don't like it. I remember taking advanced engine performance classes they were saying that the OEM o2 sensors are calibrated from the factory to work with the OEM computer. If you repair a wire in the o2 sensor wiring(or in this case just splice one in)
the wiring gets increased resistance from the added splice which alters the signal. The signal is usually like 0-5 volts and switches when you going down the road, well if you add some resistance to the wiring that is not suppose to be there the computer will get a signal that is lower than normal. I personally would not put one on my hondas.
However the customer wanted a bosch one installed that spliced in so i put it in no warrenty... It seems to switch and work okay but i don't trust it. Just a thought though to think about.