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hey guys,

got this o2 sensor, i think its a bosch unit? number on it says H3P1.

this is how it compares to the nissan plug (rb25) note different amount of wires.

how do i wire it up?

this is what i thought...

Nissan o2 sensor plug and o2 sensor with 2 white 1 grey and 1 black wire. I'm guessing black to black. Grey to red and booth whites to the white?

post-16535-0-60211200-1298350552_thumb.jpg

cheers all...

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so i have been searching and come across this..

post-16535-0-92460600-1298365001_thumb.png

so im guessing,

white (heater) to heater on plug

white (heater) to heater on plug

black (signal) to signal on plug

then grey to chassis ground

any thoughts?

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Sure it's a RB25 plug? Red, white & black wires usually indicates it takes a Titania sensor (only R32 GTRs out of all the skylines had these type). While the red doubles as a heater (+) and signal reference wire (in) and white is a heater (-) whereas Zirconia sensors it doesn't matter which way both white heater wires go. If I recall correctly there's a chassis ground near the passenger strut tower (R32 GTRs at least) you could use to ground it.

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