V8 STI Air Fuel Ratio Sensor Replacement Q?

[Koom]

My friend has been told that she needs to replace the air fuel ratio sensor in her V8 STI and has been quoted $800.

Anyone know if you can use a sensor like an Innovate (or similar) to replace the factory one? I read somewhere on here that they are 0-3v, are they simulated wideband or full or something different? i.e. can you emulate the signal via the aftermarket sensors software?

Or are you stuck with having to purchase a factory one?

[Optical]

Lc1's only let you set two reference points and it interpolates between them. You'd have to figure out what the response from the oem sensor was to see if you can simulate it

[Koom]

Yeah after asking Tony at RDL about it, it sounds like using a proper replacement is the only way forward that wouldn't do my head in.

Although I've found this thread on Nasioc that states this list of replacement sensors for the 02-05 WRX (USDM);

ACDelco - 213-2843

Airtex - 5S4302

Bosch - 15537

Denso - 234-9011

NGK - 24659

Subaru - 22641AA042

Walker - 250-54004

Going to continue googling for a while before giving up hope of finding a cheaper than $800 replacement.

[Koom]

http://shop.ebay.com/i.html?_nkw=subaru+front+oxygen+sensor+&_sacat=0&_odkw=subaru+front+oxygen+sensor+sti&_osacat=0&bkBtn=&_trksid=p3286.m270.l1313

Ebay also do a bunch but I wouldn't have a clue which is which.

Numbers on the actual sensor in question are;

22641 AA191

DENSO 12D02

192400-2090

[Optical]

She must be hot if you're trying to get your head around all those numbers

[Simon C]

Just did mine. Got quoted similar, thought it was a major ripoff. Did it myself with an hour's labour + $240 for the part shipped straight from the USA (Denso, who is the OEM manufacturer). The OEM part number is 22641AA042 I think. https://www.rockauto.com/catalog/x,carcode,1378773,parttype,5132

[Guest Fastfour]

http://www.trademe.co.nz/Browse/Listing.aspx?id=290266356

[Koom]

 Simon C']

Just did mine. Got quoted similar, thought it was a major ripoff. Did it myself with an hour's labour + $240 for the part shipped straight from the USA (Denso, who is the OEM manufacturer). The OEM part number is 22641AA042 I think. https://www.rockauto.com/catalog/x,carcode,1378773,parttype,5132

Cheers, I'll pass that on.

[quote name='Optical said:

She must be hot if you're trying to get your head around all those numbers

a) I like numbers so they're not the problem, trying to figure the difference between usdm and jdm is what gets me and

b) I like to help friends out. I'd be doing the same if she was a dude

[Koom]

 Fastfour said:

http://www.trademe.co.nz/Browse/Listing.aspx?id=290266356

Cheers but wrong side of the combustion process. Its the O2 sensor but a specific one called air fuel ratio sensor (by Subaru).

[Guest Fastfour]

Oops. Manflu brain no good

[Koom]

 Fastfour said:

Oops. Manflu brain no good

They've developed a cure for that now....

Works mint and its herbal too ;D

[Guest Fastfour]

Damn that looks so good!

[Optical]

 Koom']

[quote name='Optical said:

She must be hot if you're trying to get your head around all those numbers

/quote]

a) I like numbers so they're not the problem, trying to figure the difference between usdm and jdm is what gets me and

b) I like to help friends out. I'd be doing the same if she was a dude

i jest i jest

what are these sensors, narrow or wideband or something new?

[Koom]

haha thought of another reason too, boredom at work and its given me something to research

I'm not entirely sure what the output of them is but I have seen some posts stating 0-3v semi-wideband (I'm guessing similar to wideband but within a restricted range. I really should try and find a service manual which would normally state the output curve? There's heaps of stuff on the net with people using the Denso 22641AA042 which is easy to find and is shown as suiting a EJ205 WRX but I haven't found anything that tells me if the 22641AA191 is essentially the same sensor or not.

And the Japanese parts places only show 22641 as the part number for a bunch of different sensors for non-turbo and turbo variants. Wish the USDM and JDM stuff was easily interchangeable for once.......

[Guest boostin]

I couldn't tell you the voltage range as I've never stuck a multimeter up its jacksie, but on the Select Monitor they have a varying current output, and that's how the ECU judges whether it is rich, lean or stoich.