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O2 sensors

Discussion in '3rd Gen 4Runners (1996-2002)' started by Turfdawg, Aug 22, 2020.

  1. Aug 22, 2020 at 1:57 PM
    #1
    Turfdawg

    #1
    Turfdawg [OP] New Member

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    01 green 4 runner
    New to forum. I have 2 questions: I need to replace the O2 sensors on my recently acquire 01 runner. I am finding conflicting info. - are there 2 sensors or 3 and is it best to use DENSO?
    2nd- the keyless entry fobs aren’t working. I replaced batteries, replaced fobs and reprogrammed- still no luck: is there a receiver or something inside the vehicle to replace?
    Thank you
     
    Turfdawg, Aug 22, 2020
    #1
  2. Aug 22, 2020 at 2:07 PM
    #2
    SR5 Limited

    #2
    SR5 Limited New Member

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    Welcome. I posted the manual to the alarm in a post below. It may help with pairing up the remotes.
     
    SR5 Limited, Aug 22, 2020
    #2
  3. Aug 22, 2020 at 4:04 PM
    #3
    SR5 Limited

    #3
    SR5 Limited New Member

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    CDBE56CF-948D-473C-9107-9436D0090ECC.jpg 0E387E0D-281B-4FF1-908A-2E0CA416E8DA.jpg Seems my pdf isn’t loading. To pair the new remote to your alarm....
     
    SR5 Limited, Aug 22, 2020
    #3
  4. Aug 23, 2020 at 12:11 PM
    #4
    Clutchplate

    #4
    Clutchplate New Member

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    There are 2 O2 sensors. Do yourself a favor and get Denso only.
     
    Clutchplate, Aug 23, 2020
    #4
  5. Oct 9, 2020 at 11:44 AM
    #5
    mousemeat

    #5
    mousemeat New Member

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    upgraded suspension, large all terrain tires
    yes , exactly...i replaced both of mine...and the check light & codes, stopped.
     
    mousemeat, Oct 9, 2020
    #5
  6. Oct 9, 2020 at 1:08 PM
    #6
    negusm

    #6
    negusm New Member

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    Remember...some 4Runners came with downstream A/F sensors and not O2 sensors. Make sure you know which is which. They look the same.
     
    negusm, Oct 9, 2020
    #6
    Jkpt445 likes this.
  7. Dec 27, 2021 at 9:15 AM
    #7
    Benamaro

    #7
    Benamaro New Member

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    How do I know? I need to change mine soon and was gonna buy the upstream and down stream ca compliant O2 sensors now I'm hesitant because of A/F sensor?
     
    Benamaro, Dec 27, 2021
    #7
  8. Dec 27, 2021 at 9:27 AM
    #8
    negusm

    #8
    negusm New Member

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    1999-2000 had 02 sensors.

    2001\2002 could have either.

    Call your dealer with your vin. They can tell you the exact part number and you should be able to cross reference it to what kind it is.
     
    negusm, Dec 27, 2021
    #8
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