I purchased a generic 4 wire Oxygen sensor to replace my broken stock (94,000km Bank 1) O2 sensor on my P5. When the O2 sensor arrived I noticed the wire colours are different from my stock O2 sensor. The generic ones dont come with a harness so you need to connect it yourself. Can someone tell me which colour wires I supposed to match up.

IE: blue to grey

My stock O2 sensor = black, black, blue, white
Generic O2 sensor = white, white, black, grey


Thank you

 

Did you by chance figure this out? I have to do the same thing this coming weekend.

 

Mazda OEM was two blacks, one blue, and one white. The Bosch has two whites, one black, and one grey. They connect to each other in that order. The grey on the Bosh and the white on the OEM are ground. The black on the Bosch and the blue on the OEM are the signal. The two blacks on the OEM and the two whites on the Bosch are for the heater.

You're in bidness.