NTK O2 Sensors
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Originally Posted by BillBost37
Picked up my 4 wire for $60 locally

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From: Farmington, Minnesota =MWBF '05 SURVIVOR= =CEBF '06 SURVIVOR= =August '06 COTM=

Originally Posted by BillBost37
Sex for auto parts....hmmm hopefully she'* cute too.
I still have mine to sell, but it depends what year your car is. The one im selling is single wire.
http://www.bonnevilleclub.com/forum/...ic.php?t=33428
http://www.bonnevilleclub.com/forum/...ic.php?t=33428
Well, they both read O2 levels. But if I understand correctly, only the one in the down pipe really affects gas mileage. I think the one behind the cat makes sure the cat is working correctly. I think it will throw a code if it reads that the cat isn't doing its job.
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That is correct..... The one in the rear manifold helps the PCM determine air fuel ratio.... The one behind the cat helps the PCM ensure that the Cat is functional... 
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