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Discussion Starter · #1 ·
I'm wondering what color wire is the signal wire for the front 02 sensors in a 2004 mini S . I'm wondering on the wireharness not on the 02 sensor .
I'm wanting to tap it for a narrow band 02 sensor I have laying around that is like to install for a cool light show . Lol my daughter who's 10 and is a car nut loves watching the gauges and reporting them off to me periodically as we drive.lol
 

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Discussion Starter · #3 ·
I am wanting to splice into the signal wire ,rite behind the 02 sensor on the factory wireharness under the hood.
I WANT a fuel ratio sensor just to monitor a few things . I wanna keep a closer eye on things exp since I'm installing a launch controller / no lift shift box..
 

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below pic shows ecu pinout for signal wire trace it off the pinout best way
 

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