my downstream o2 sensor(on cat) is shot, so i just bought a new denso one for my car on ebay, but it doesnt specify wether its the upper or the lower one, i mean, are these 2 sensors interchangable? or are they 2 completely different?
Re: Upstream or Downstream O2 Sensor? interchangable? (TunerShark)
It should. I know on the Integra, the secondary sensor has a rubber grommet to seal the hole where it enters the car, and the wiring might be a slightly different length. I'm not entirely certain, but I assume it's a similar situation with the Civic. Either way, it shouldn't be a big issue.
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