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Wrong O2 sensor?

Discussion in '1st Gen. Tacomas (1995-2004)' started by matches3215, Oct 23, 2021.

  1. Oct 23, 2021 at 7:25 PM
    #1
    matches3215

    matches3215 [OP] Well-Known Member

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    I'm doing both afr and O2 sensors rn. The front one matched the replacement part. But the rear sensor looks different. It's a denso ordered from rock auto. I got the part number from the denso website. Should I install this sensor anyway? Could it be possible they changed design since 2000? New one is on the left in pics. The new one is on the bottom in the pic with the plugs. New part number is 234-4189

    20211023_191751.jpg
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    20211023_191817.jpg
     
  2. Oct 23, 2021 at 7:28 PM
    #2
    Nessal

    Nessal Well-Known Member

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    Looks like the connector and flange is the same so I reason that it is a revision. It's a narrowband so they really aren't that complicated. I wouldn't hesitate to use it.
     
  3. Oct 23, 2021 at 7:30 PM
    #3
    Bishop84

    Bishop84 Well-Known Member

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    You're good, as long as the part # is right, you have no worries. Parts change appearance, especially over 20 years.
     
    TnShooter likes this.
  4. Oct 23, 2021 at 7:31 PM
    #4
    v5ensx

    v5ensx CARB legal is not CALI legal

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    You're comparing oe toyota to Denso. Manufacturers will vary slightly.
     
  5. Oct 23, 2021 at 7:31 PM
    #5
    Superdave1.0

    Superdave1.0 Grandma Dave

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    If you don't get any CEL then run it. The front one is more critical. Rear one is just to check the cat is doing it's job.
     
  6. Oct 23, 2021 at 7:34 PM
    #6
    Black DOG Lila

    Black DOG Lila Well-Known Member

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    Stock. EZ pass.Dump pass.Inspection sticker.Convict printed lic.plates.FG cap.
    Did the new O2 sensor come with gasket and rubber body plug ?
    It looks right, laser etched product ID.
    Is the old one laser etched ?
     
  7. Oct 23, 2021 at 7:40 PM
    #7
    matches3215

    matches3215 [OP] Well-Known Member

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    The new one comes with a rubber body plug. Both plugs are laser etched. Different numbers but ones an OE number so I'm not worried about that.

    Thanks for the quick responses guys! I'll throw it in.
     
  8. Oct 23, 2021 at 8:25 PM
    #8
    matches3215

    matches3215 [OP] Well-Known Member

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    Sensors are in and cel cleared. Hopefully it doesn't come back and I don't need to replace a cat. Not sure if the cel was supposed to go away after replacing but w/e.
     
    Black DOG Lila likes this.

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