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O2 sensors on 2013 X5 Diesel
Does anyone know with certainty how many O2 sensors are on the car? If so, where? It is my understanding the O2 sensors are before and after the primary cats, but my shop told me that the new design is that there is an O2 sensor after the secondary cat on the diesel now. I was hoping to straight pipe the secondary cats but don't want the CEL. Anyone confirm?
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