where, as ON Car?
you forgot to post engine option, so nobody can anwer easy
but Sensor 1 is the sensor ,closest to cylinder 1.
Bank 1 is the bank closes to cylinder 1.
on I4 engines Cyl #1 is closest to the cam, and crank pulleys.
on V6 /V8 Cylinder 1 is that bank that is most forward.
on V egines, on bank sits forward, one rear.
if you told engine , size and displacement, this be snap.
or look it up on alldata.com
or google your real engine type.
guessing, USA>....???
3.2 L
J32A3 (258 hp)
V6
3.5 L
J35A8 (286 hp)
V6 (Type-S only)
J32
first google hit
shows (ASCII art, kwel)
No it is
1-2-3
4-5-6
Front of car
so on this V6 , bank 1 is rear, right. see? it above?
and B1S 1 is rear bank, sensor top. sensor closest to engine head.
sensor 2 is always behind CAT, in fact its the CAT monitor sensor.
at a 100k mile replace both V6, top sensors. for max MPG.
they dont last 300k like engines,.
the rear is leave for smog man kicks in behind, only. p420x...
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