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Upstream vs downstream 02 sensor?

Discussion in '1st Gen. Tacomas (1995-2004)' started by Off-grid yota, Feb 19, 2021.

  1. Feb 19, 2021 at 7:58 PM
    #1
    Off-grid yota

    #1
    Off-grid yota [OP] New Member

    Joined:
    Feb 19, 2021
    Member:
    #356727
    Messages:
    4
    Gender:
    Male
    First Name:
    Rick
    Vehicle:
    98 toyota tacoma 2.7l
    All original
    Ok I got a question I got a 98 toyota tacoma 2.7l and my 02 sensor is needing replaced but I went to order them and what is the difference between an upstream 02 sensor and a downstream 02 sensor and how many is there I got my repair book ordered
     
    Last edited by a moderator: Feb 19, 2021
    Off-grid yota, Feb 19, 2021
    #1
  2. Feb 19, 2021 at 8:11 PM
    #2
    Black DOG Lila

    #2
    Black DOG Lila Well-Known Member

    Joined:
    Jun 14, 2019
    Member:
    #296344
    Messages:
    9,116
    Virginia
    Vehicle:
    2003 Tacoma SR5 2.7 5 speed 4WD
    Stock. EZ pass.Dump pass.Inspection sticker.Convict printed lic.plates.FG cap.
    Black DOG Lila, Feb 19, 2021
    #2
    Off-grid yota[OP] and TnShooter like this.
  3. Feb 20, 2021 at 11:16 AM
    #3
    Off-grid yota

    #3
    Off-grid yota [OP] New Member

    Joined:
    Feb 19, 2021
    Member:
    #356727
    Messages:
    4
    Gender:
    Male
    First Name:
    Rick
    Vehicle:
    98 toyota tacoma 2.7l
    All original
    I appreciate it thank you very much
     
    Off-grid yota, Feb 20, 2021
    #3
    Black DOG Lila likes this.

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