Here is my info that I have in my files...
I know the Bosch wiring is:
White = heater (+ or - doesn't matter as there is no polarity)
White = (same as above)
Grey = Ground
Black = Signal
but the LR ones are different colors.
I think according to the Elec Manual that it's:
OG = heater (+)
YB = heater (-)
WG = Signal
WO = ground
Does anybody out there know if this is correct? It looks like it from the manual and pinout (see attached) but if somebody knows for sure, I would appreciate it.
GEMS 02 sensor wire colors:
red-12v heater
yelo-gnd
wht-gnd heater
blk-signal