Changing Oxygen Sensor (O2) On R34 Gt-T

[tmumf]

Hey guys.

i know prior to actually taking the plunge, there was a few comments round here which alluded to the fact that you may be able to install a OZA395-E2 type plug (NGK/NTK) on an R34 GT-T (Neo). Rather than forking out the huge price for a Nissan one, and after discussing with Kudos motorsports on the phone for a little while - i took the plunge and purchased the 395 plug and put it in my car.

few notes for those doing it after me:

1) disconnect plug + take off the shield which holds the o2 sensor plug. (10mm spanner - 1 bolt). -

2) definitely definitely do NOT use a regular spanner unless you know what your doing (or unless its offset) - you will burr off the o2 sensor, then your flucked.

3) in addition to above, try buying a proper o2 sensor socket (22mm off ebay - they're cheap as).

4) in addition to the above x 2, i used a spark plug remover tool. who knew that some spark plugs were 22mm?

5) spray WD40 on the thread, give it some hits with a hammer, spray wd40, hit repeat, warm up the car, let it cool down, hit, spray.

6) it will eventually come loose, it may not look funcked - but if your reading this thread, it probably will be.

7) now, while i was doing this above the plug was disconnected from the ECU / car....(as per #1). Cut & strip the wires (3 wires) about 3-4 inches below the plug on the o2 sensor.

8) get your new plug, cut its plug off and strip the wires - tighten new o2 sensor into dump pipe.

9) join the wires in the following manner (it obvious): Black -> Black, White -> White, Black -> Black. (doesn't matter which black goes to which black, crimp that shit nice and tight.

10) put the heat shield back on the car (10mm), join the plug back up with the o2 sensor, and join it back on the heat shield (should still fit as we kept the original o2 r34 plug).

11) clean up engine bay, make sure stuff isnt sitting on rocker cover etc.

12) bridge the consult port and rev above 2,000 rpm and make sure it passes as per the manual!

13) celebrate!!

to note:

original part number:

22690-AA00

new part number:

OZA395-E2

to clarify: this is a Zirconia 3 wire, 22mm thread which the 33 / 32 boys are using.

to triple clarify: this definately works on an r34 with proof that it fixes fuel economy.

if youve done this and havent fixed your fuel economy: then its either:

- AFM (clean this out, specially if youve changed your filter).

- AAC Valve (search)

- coilpacks

- sparkplugs (pull them out and check the condition on them, heaps of guides)

- tuning (get a nistune - get it dyno'd)

- your right foot (control it).

hope this helps all.

Tim

[Roffy92]

nice writup

just adding my 2 cents

put a new sensor in my 33 the other day n the old one was in there TIGHT with minimal room to move my 22mm spanner.

ended up using a cold chisel and knocking it around with that to break it loose then spanner from there.

may have to remove allll turbo heat shields (including dump) i even had to pull out my J pipe from the BOV blowback.

anyway point being they are a B**ch to get out

good luck!

[tmumf]

they're always real tight, with the exhaust heat expanding and contracting consistently, it would just about weld it in there after 100k kms.

the 22mm spark plug remover was the trick for me - couldn't recommend it more.

Tim

[zamnap]

when do I need to change this sensor...

how do i know that this sensor is still working perfectly

[tmumf]

been millions of topics to that my friend. you need to search.

search for consult, lambda or o2 sensor.

[369]

to quadruple clarify:

did you mean 18mm thread (screws into dump) and 22mm nut (to tighten)?

also there is only one black wire and 2 white wires.

thanks

Edited September 26, 2011 by 369

[msports180]

Does anyone know if this is definitetly the case? I have a tune soon and have forgotten to get a new 02 sensor, and there is a wait for a R34 one yet i can grab one of these off the shelf?

Also i dont have the old sensor, can someone tell me what wire goes where on the plug on the car side? Has 3 wires all brown.

Cheer's!