Okay, it's not a wideband, jsut an Air/Fuel gauge. It can jsut be spliced into the factory wiring, but because it's nto a wideband, sorry to say but with Mazda's sensors, you pretty much wasted your money. All it will do is blink back and forth, back and forth, back and forth... This has been discussed to no end here (do a search) but there's no info that can e gathered from a narrowband gauge on Mazda's O2 sensors.