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O2 sensor part numbers?

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Old Jul 17, 2017 | 07:07 PM
  #1  
gregs69rs's Avatar
gregs69rs
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Default O2 sensor part numbers?

Like many on here, I have the persistent p0171 error code I am chasing on my 1999 ES300. I cleaned the MAF and that bought me about 2 weeks of relief then the code came back. I replaced the MAF and got about a week of relief. I am now going to try replacing the bank 1 o2 sensor. I came up with Denso part number 234-9007 and ordered it from eBay. Well, the part showed up today and it is 234-9021. I am waiting to hear back what the vendor says, but is this a replacement part number?
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Old Jul 20, 2017 | 07:44 AM
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OEM Part #: 89467-41040
MSRT: $206.36
Your Price: $ 139.99 w free shipping
2000-2003 TOYOTA SIENNA 3.0L
1999-2001 LEXUS ES300 3.0L
2000-2004 TOYOTA AVOLON 3.0L
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Old Jul 20, 2017 | 08:41 AM
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According to RockAuto 234-9007 is the way to go (they sell it for $116.79 + shipping). Seller either sent you the wrong part, or it's a generic knockoff. Lots of "Chenso's" on eBay nowadays.
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Old Jul 20, 2017 | 10:00 AM
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Denso makes these OEM parts for Lexus.

I used Denso 234-9021 air/fuel sensor on my ES (2000) :
Amazon Amazon

Also used Denso 234-4137 oxygen sensor :
https://www.amazon.com/gp/product/B000C5UFQ2/ref=oh_aui_search_detailpage?ie=UTF8&psc=1 https://www.amazon.com/gp/product/B000C5UFQ2/ref=oh_aui_search_detailpage?ie=UTF8&psc=1
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Old Jul 21, 2017 | 02:05 PM
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Looks like they just sent the wrong part. i am exchanging it. Thanks all!
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